Releases

General discussion about the sport of hang gliding
Steve Davy
Posts: 1338
Joined: 2011/07/18 10:37:38 UTC

Re: Releases

Post by Steve Davy »

http://www.hanggliding.org/viewtopic.php?t=34685&
Wanted "Winch Tow Release"
Davis Straub - 2016/09/06 22:40:13 UTC

http://ozreport.com/pub/images/bridles060106.jpg
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That's just great, Davis! So now, in order to terminate the tow in an emergency situation, someone dumb enough to go up on that crap has to pry that bent pin barrel "release" open AND then go hunting for the lanyard on the three string release.

http://ozreport.com/1149624110
Over/under bridles

Good thinking there, Steve exceptionally stupid Wendt.
Dave Gills
Posts: 45
Joined: 2014/12/15 17:54:14 UTC

Re: Releases

Post by Dave Gills »

I know I should not enter into these release discussions but I can't look away.

To make it worse...
Even the the ones who get the primary figured out now have to think about a weak link, secondary release & bridle configurations.
F-me-running :roll:

Someone did PM me about selling him an RMR so I guess it wasn't a total waste of time.
Steve Davy
Posts: 1338
Joined: 2011/07/18 10:37:38 UTC

Re: Releases

Post by Steve Davy »

I hope that it was Brad Barkley, and I hope that you told him to go fuck himself.

http://www.hanggliding.org/viewtopic.php?p=327659#327659
2013/07/11 13:47:16 UTC - 3 thumbs up - NMERider
2013/07/11 12:40:02 UTC - 3 thumbs up - Paul Hurless
2013/07/11 04:10:08 UTC - Sink This! -- michael170
I think that you need to offer an apology for that bullshit, NMERider.
User avatar
Tad Eareckson
Posts: 9149
Joined: 2010/11/25 03:48:55 UTC

Re: Releases

Post by Tad Eareckson »

Jump to next post:
http://www.kitestrings.org/post9623.html#p9623

Transferring from the Tres Pinos thread:
http://www.kitestrings.org/topic89.html
to follow a new Jack Show thread the to which the incident has given rise.

http://www.hanggliding.org/viewtopic.php?t=34646
Are you satisfied with flex wing handling qualities?
Steve Corbin - 2016/08/21 02:06:52 UTC
Yeah Steve, I am. I recognize a hang glider for what it is and what the limitations and tradeoffs are and that ALL fixed wing aircraft have limitations and tradeoffs.
I posted this on page 15 of the Incident Reports topic of the Los Trinos accident:
Good start, Steve. Always a pleasure to read stuff by authors who've really done their homework and really care about getting things right.
"How many pilots have to die as a result of The Lockout?
Hopefully all the ones who:
- think that:
-- towlines transmit pressure from the power end
-- a:
--- reach will be easy in an emergency situation
--- center of mass bridle autocorrects for roll
--- bridle which:
---- splits the tow force between the:
----- pilot and glider is a three point
----- pilot's shoulders only is a pro tow
--- one point aerotowing is perfectly safe
--- weak link:
---- keeps you from getting into too much trouble
---- pop is an inconvenience
---- is:
----- an emergency release
----- the focal point of a safe towing system
--- hook knife makes a really great emergency release when one's Infallible Weak Link fails to fail
-- something resembling a thought process went into the standard aerotow weak link
-- flying in the center of the Cone of Safety will render them lockout proof
-- Jim Rooney has a keen intellect
-- Bobby Bailey is a fucking genius when it comes to this shit
-- Steve Wendt is exceptionally knowledgeable
-- Dennis Pagen DOESN'T deserve to be stood up in front of a fuckin' wall

We don't kill NEARLY enough "pilots" in towing crashes. If we just killed the ones who deserve to die three times over I one hundred percent guarantee you we'd eliminate all problems in towing in the space of a month and a half.
It's insane to keep insisting that a purely weight-shift controlled aircraft can be towed safely.
Thank Gawd we have a sane person like you who doesn't tow defining insanity for tow pilots.
The only aircraft that should be considered acceptable for towing are those that have demonstrated the ability to recover from any attitude while being towed.
You mean like?:

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It simply amazes me that every time we have a towing accident the conversation always ends up focused on releasing....
http://ozreport.com/forum/viewtopic.php?t=24846
Is this a joke ?
Jim Rooney - 2011/08/25 04:55:25 UTC

It always amazes to hear know it all pilots arguing with the professional pilots.
...or on the merits or deficits of any particular release mechanism.
You mean from the people who ACTUALLY TOW and develop and/or use superior systems that would've turned really spectacular fatals into nonevents?
Anytime a pilot being towed has to release before the normal time should be a red flag warning that we have a serious equipment deficiency that needs fixing.
Ditto for any time a driver has to slam on the brakes before arriving at his intended destination. Or an airliner gets diverted or stays on the ground because of crap conditions.
Nobody says a word about lockouts, or our susceptibility to getting locked out while flying a purely weight-shift controlled aircraft.
Nah Steve...

http://www.hanggliding.org/viewtopic.php?t=12403
weak link table
ian9toes - 2009/06/14 15:18:37 UTC

I strongly disagree with banning the one guy who has the most knowledge about safety issues involving what I believe is the most dangerous part of our sport. I hear someone dies every year from towing. I hope SG bites his tongue in the interest of public safety.
We're all fucking morons with no fundamental understanding of the physics and mechanics of what we've been doing since the early Eighties.
We aren't trying hard enough.
I know fer sure that YOU are anyway. Always a major force in the discussions serving as a nucleus around which the people who really have their shit together can unite and effect really positive changes - like putting fins and ailerons on our kites.
We're just like the Pg crowd, trading safety and performance for convenience.
If we were that much into convenience then how come we used the standard aerotow weak link to increase the safety of the towing operation for as many decades as we did?
The form may be different but the content is the same.
Get fucked, asshole. They can't fix their problem. In hang gliding the culture won't permit anybody to implement the fixes they've already developed. (Read your stupid post, ferchrisake.)
Yeah, I'm just a cranky old curmudgeon. But I'm right."
Ever meet a hang glider jockey who WASN'T?
As expected, many are chiming in with their own two cents worth. Come one, Come all, you're invited to make your inputs, if you can think of some.
Oh. You got my Jack Show posting privileges restored? Thanks bigtime.
First I'll introduce myself...
You've already introduced yourself much more than adequately in this post already.
...and provide some info about my flying, and my attitude about flying, which has been shaped by my experiences and the experiences of others, some of which I was personal witness to.

I was almost finished with my Private Pilot course in the spring of 1976. I tried out a Hg, bought it, and never went back to airplanes.

After 40 years of Hg I've decided to open up and speak out concerning some issues. You may dismiss me as a cranky old curmudgeon, but hopefully you'll consider my logic before putting me on your Ignore List.

I started my aeronautical adventure as a small child with a dime glider. I've designed and built and (tried to) fly many model gliders and airplanes.

While it's true that I'm poorly educated, I have eagerly read a lot about aeronautics ever since I broke that dime glider. I did eventually go to school and got an Airframe & Power plant Mechanics license...
Puts you in a league with Paul Hurless - repairing and replacing parts other people have designed and built. What more could we possibly ask for. (Are you sure you can't invent an aerotow release system vastly superior than anything the planet has ever seen then not describe it to us the way Paul didn't?)
...and I humbly accept your heartfelt thanks for not getting a job working on airplanes.

It's a fascinating hobby, and I mean the whole range of aeronautical pursuit is of great interest to me.
Am I the only reader here who just heard absolutely nothing about experience in or familiarity with hang glider towing?
While Hg remains my favorite way to fly, I know that the experience of personal flight can be much better than it is. I am convinced that an aircraft utilizing only pure weight-shift control is excessively limited in the type of maneuvering it can perform...
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...and this applies whether the launch is from a hillside or by towing.
Are you sure hang gliders are even capable of being towed? Have you ever actually seen it happen?
Please note my use of the term 'excessively'. This term can be subjective...
Perish the thought.
...and I think we'll see some comment from those that disagree with me concerning how much control is necessary for safe flying.
Just get Jack to ban anyone who doesn't agree with you. You'll be fine.
Some will feel that their degree of control is adequate to the task, and some will agree that our degree of control is excessively limited.
And let's certainly not delve into the ACTUAL *PHYSICS* of hang glider towing and get away from what the assholes who do it FEEL.
A few months ago there was another lock-out related death in our community in Florida.
- A highly qualified Two at a top notch operation on the very best of equipment. I've read the very detailed and professional report from US Hang Gliding, Inc. and concluded that this one happened solely because of the limitations of control of a purely weight-shift controlled aircraft. Everybody was doing everything right and there's no fuckin' way anyone could've survived that evening training flight without using a glider with vastly superior roll control response. And perhaps quicker inconvenience stall recovery properties as well.

- That was not an AERO tow. And you write as if ALL towing were aero - the most dangerous flavor. You don't even acknowledge platform in which you almost always need a real Sam Kellner caliber genius...

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...to fuck things up enough to hit the breaking point. (A bit odd that he's not participating in this conversation, dontchya think?)

- Tomas was still healthy when the unidentified tow driver decided to make a good decision in the interest of his safety and very abruptly stop towing him. And when a glider's STALLED...
Wills Wing / Blue Sky / Steve Wendt / Ryan Voight Productions - 2007/03

NEVER CUT THE POWER...

Image

Reduce Gradually
Increase Gradually
...it doesn't matter how good or crappy its roll response is.
Being tired of hearing or reading about these accidents and incidents...
One can only imagine the untold hundreds of hours you've spent hearing or reading about...

http://www.ushawks.org/forum/viewtopic.php?f=17&t=1081
Platform towing /risk mitigation / accident
Sam Kellner - 2012/07/03 02:25:58 UTC

No, you don't get an accident report.
...these accidents and incidents.
...I spoke up on a forum....
A forum you're permitted to mention on The Jack Show?
....where someone else...
A someone else you're permitted to mention on The Jack Show?
...had posted a video...
A video you're permitted to post on The Jack Show?
...that gave a demonstration of what truly effective control is all about.

That video was shot from cameras mounted on an aerobatic sailplane, which was being aero-towed behind a Piper Pawnee (I think).The video from the sailplane showed the glider pilot performing precision axial rolls behind the tug.
http://www.youtube.com/watch?v=PY-6hVRmC1U

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Yeah, there's no fuckin' way a HANG GLIDER...

http://ozreport.com/forum/viewtopic.php?t=865
Tandem pilot and passenger death
Davis Straub - 2005/10/15 05:50:52 UTC

In the pre-Worlds in Forbes, NSW, Australia in the late nineties, those of us flying the Icaro 2000 Laminars got them just before the meet began after we has been in the country for a while. I had been flying a Moyes Extra Light, king posted glider.

On the first day towing the Laminar I believe I had nine tows, but maybe it was only seven. During those terrible tows I had at least three barrel rolls.
...could do a barrel roll on aerotow. We just don't have the roll control authority to make it happen. Or stop it from happening. I always get confused in these discussions.
So here we are being towed aloft in our Hg's...
WE who, motherfucker? Still haven't heard about you ever going up on one end of a string.
...and if we get more than a few degrees off on our heading...
How many degrees off his heading is...

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...this sailplane getting? Compare/Contrast with Dave Pendzick...

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...AKA DAVE858 - on his first ever aerotow launch:

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...OSCILLATING (Pilot Induced of course), overcontrolling, using excessive roll input - which is actually symptomatic of somebody who knows how to fly a hang glider. Doing the right thing, just too much of it. (Compare/Contrast with Wallaby victim Shohei Asai...

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... 2014/01/05, who's been put up without the slightest clue as to roll controlling a hang glider. (But don't worry. If that had been on takeoff his Wallaby Link would've broken before he could've gotten into too much trouble.))

Standard aerotow weak link...

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...increases the safety of the towing operation...

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...here...

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...because Dave "might have been locked out a little bit." (Right, Tina?) But not:

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...
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...or bank angle...
What the fuck do you mean about GETTING a few degrees off OUR bank angle?

- WE can and do get way the fuck off OUR bank angle all the fuckin' time and continue the tow at least for a while when we're new and overcontrolling. Talk to the exceptionally knowledgeable witnesses of Holly Korzilius's first effort at pro towing. Tugs fly fast which means that the gliders tied to them also fly fast and fast hang gliders have roll control to burn.

- The other way WE get off OUR bank angle is to get...

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04-1409

...asymmetrically clobbered by a thermal. But nonlaminar air doesn't exist in Ryan Instant-Hands-Free-Release Voight's world of aviation so let's throw that out of the equation.

(Bit odd the way peeetaaar leaves BOTH hands...

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...in position on the basetube and doesn't make an easy reach for anything while he's fighting the freeflight roll and recovering his heading, dontchya think?)
...we get "locked-out" and have to terminate our tow...
Big fuckin'...

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...deal. Taking a hand off the basetube is never an issue during a tow lockout.
...which is usually a minor aggravation...
Dennis Pagen - 2005/01

I pulled in all the way, but could see that I wasn't going to come down unless something changed. I hung on and resisted the tendency to roll to the side with as strong a roll input as I could, given that the bar was at my knees. I didn't want to release, because I was so close to the ground and I knew that the glider would be in a compromised attitude. In addition, there were hangars and trees on the left, which is the way the glider was tending. By the time we gained about 60 feet I could no longer hold the glider centered--I was probably at a 20-degree bank--so I quickly released before the lockout to the side progressed. The glider instantly whipped to the side in a wingover maneuver.
Suck my dick, Steve. This guy:

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...with the bridle routed OVER the bar has all fuckin' day to release and safely abort the locking out tow. But he can't afford to make the easy reach and hunt for the lanyard while he's trying to be a PILOT in an emergency situation. So he does what he can with what he has and gets his brain mushed and life destroyed. But he'd have probably have been OK if only he'd had a pair of your imaginary ailerons.
...but if the release decides it's gonna "lock-out" also...
Which we already know it WILL...

http://www.hanggliding.org/viewtopic.php?t=21033
barrels release without any tension except weight of rope..
Bart Weghorst - 2011/02/25 19:06:26 UTC

But I've had it once where the pin had bent inside the barrel from excessive tow force. My weaklink was still intact. The tug pilot's weaklink broke so I had the rope. I had to use two hands to get the pin out of the barrel.
No stress because I was high.
...many years before the incident but the important thing is we're using something with an extremely long and ever lengthening track record.

If you go up with a release that has any possibility of locking out then fuck you. You deserve to die and I have way less than ZERO sympathy for you. It'll be just another great day for the gene pool.
...then things can get pretty hairy, most especially so if we're at a low altitude.
- Just don't be at a low altitude then. Problem solved. (Don't see anything in the SOPs about running weak link inconvenience drills at low altitude, do ya?)

- That's why we fly with really safe weak links. They increase the safety of the towing operation and all we've gotta do is pull in and properly respond to the inconvenience. (And hope the ground doesn't keep coming up so fast.)
In fact, this scenario is a potentially very deadly one.
But as long as our release doesn't lock out after we've made the easy reach to it we'll be fine.
The video from the sailplane showed the glider pilot performing precision axial rolls behind the tug. Lock-out? What's a "lock-out"?
Notice his HEADING stays nicely aligned with the tug's at all times, dickhead?
Now I ain't tryin' to say that we need that degree of control to safely operate a Hg.

But the distance between that guy and us, as measured in controllability, is a vast one, like from here to the moon.
Go back to your Bob Show cult, Steve.
Without adding much weight or cost, our controllability of Hg's can be vastly improved.
And we'll be able to fly the glider with ONE hand just fine. So we really don't hafta have any more stupid arguments about releases, load capacities, actuation systems.
But a decision was made back in the '70's that is crippling our sport today.
Ease up on the fatality reporting a bit. We're trying to PROMOTE the sport, after all.
Our Hg manufacturers decided to stay with Pure Weight Shift, or PWS.
Despite our desperate pleas for ailerons.
Competition rules were written that prohibited any control of the aircraft by means other than PWS.
- And if you can't fly your bird in competition then why bother flying at all? Why even go on living? What would be the point?
- I guess people don't have aileroned Falcons 'cause they wouldn't be able to fly them in competition.
Now I'm obviously referring to "Class 1" gliders, the least expensive and, most popular by far, Hg's.

I was conversing with some pilots that work for a Hg company. I was asking about the possibility of us ever getting some sort of control augmentation...
Like maybe a built-in bulletproof release system that doesn't demand control compromise to blow like...

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...all sailplanes have?
...and was informed that such a thing would disqualify the glider from competition.
Yeah, so would a...
Risk Mitigation Plan for the Quest Air Open

6. Equipment safety check in advance

Competitors must use appropriate aerotow bridles as determined by the Meet Director and Safety Director and their designated officials. Bridles must include secondary releases (as determined by the Safety Director). Bridles must be able to be connected to the tow line within two seconds. The only appropriate bridles can be found here:

http://OzReport.com/9.039#0
ProTow
Image

and:

http://ozreport.com/9.041#2
More Protows
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Pilots with inappropriate bridles may purchase appropriate bridles from the meet organizer.
...built-in bulletproof release system that doesn't demand control compromise to blow like all sailplanes have.
So a little later on I got to thinking about that, and got to wondering just how much that not being able to compete would affect my flying. Since I've never competed and don't plan to, I figure that this competition rule has only affected my flying experience in a negative way. Since no one wanted to crack that rule, no advancement in the area of Hg control has come along and given relief to my aching shoulders.
Bullshit. Get an Atos.
And I wonder how many high-performance gliders produced ever actually get used in a contest where the rule applies. Five percent? Fifteen? Twenty? In the meanwhile, in 2016, the rest of us have to make a decision between controllability and performance. 'Cause we ain't allowed to have some simple device that is manually operated, we're only allowed PWS because a handful of us want to have a contest.
And they're the motherfuckers who control all the AT operations.
There's something wrong with this picture.

To close...
Thank gawd.
...I simply suggest that better handling Hg's won't make us any less attractive than we are now.
I don't think there's anything left that could make hang glider culture less attractive than it is now. Tim Herr has already encoded everything imaginable in the SOPs.
I daresay it would improve our image in some circles.
Don't hold your breath.
Image
Yeah, throw a little popcorn smile in for your graphics. That'll make up for the total absence of videos, photos illustrating this critical lack of roll control authority that's killing all of our great tow pilots. You haven't even cited a crash report with results of any level of seriousness to support your position because their essentially nonexistent. Hang gliding culture as it is totally confident that it has control authority to squander on tow. And it squanders it with its foot launching of students, pro toad bridles, easily reachable releases, and infallible long track record weak Links. And on tow and free flight launch pilots alike are good coming in with their hands at shoulder or ear height where they can't control the glider. And if anything bad results it's 'cause they got hit by an invisible dust devil.
2016/08/29 06:15:47 UTC - 3 thumbs up - flyzguy
Oh look, a volunteer to help reinvent hang gliders already. I think I'll start holding my breath now.

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User avatar
Tad Eareckson
Posts: 9149
Joined: 2010/11/25 03:48:55 UTC

Re: Releases

Post by Tad Eareckson »

Jump to next post:
http://www.kitestrings.org/post9624.html#p9624

http://www.hanggliding.org/viewtopic.php?t=34646
Are you satisfied with flex wing handling qualities?
Dave Pendzick - 2016/08/21 02:40:05 UTC

Maybe there needs to be a better emergency release system, perhaps something like the Automatic Activation Device AAD utilized in skydiving.
So what's wrong with your...

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83-082328
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84-082403
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85-090813
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...Wallaby Release? Bicycle brake lever securely velcroed to your starboard downtube within extremely easy reach and an extremely long track record.
For those not familiar, It will automatically sever the reserve closing loop when a jumper exceeds 80mph below 700' AGL.
Good idea. I can handle hitting the ground at 70mph in my sleep.
It has saved many many lives.
And we OBVIOUSLY have ten times the talent we need in hang gliding to develop something like that.
Maybe if such a device were designed & built into the Carabiner...
Oh good. A new spelling of "carabiner" - capitalized in the middle of a sentence.
...which connects pilot to the tow rope & could be activated via a bite switch the pilot could have in his mouth.
Yeah, we couldn't just do anything like:

http://www.youtube.com/watch?v=rh3-uZptNw0


That would be WAY too Rube Goldberg.
I do not feel that the glider is somehow not efficient in design & needs radical design changes as tens of thousands of tows have happened without incident.
Yeah Dave. Let's look at your first two aerotows...

30-030129
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33-030202
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61-082304
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67-082310
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Not a hint of an incident in either of those. Of course they're being super vigilant with respect to your equipment 'cause those are your first two aerotows.
Pilots are the problem & not the aircraft.
- Shouldn't a release system be considered part of the aircraft and, if so, how come you're proposing a bite controlled actuation system?

- So are you implying that it's advantageous to have TWO hands on the control bar continuously in an emergency situation and that a release system such as what you're proposing could save many many lives? And thus that many many lives - Nancy Tachibana's and Jeff Bohl's come to immediate mind - have been needlessly lost simply due to The Industry's negligence in adopting such systems?
I do feel towing is an advanced skill & should not be utilized in training students, but this is only my opinion.
So only in your opinion Steve Wendt / Wills Wing...

http://vimeo.com/116997302


...are totally full o' shit?
Interesting topic.
It always is. Following every reasonably well publicized towing fatality. Always all these great ideas, ignoring of all the existing and flying solutions, and nothing ever changing - for the better anyway.

87-105815
http://c1.staticflickr.com/9/8754/28786035474_be82ce8f44_o.png
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Keep up the great work, Dave.

P.S. Note that Dave's using a helmet cam and thus we know he's looking sideways the whole duration of the easily reachable...

http://www.chgpa.org/forums/viewtopic.php?f=2&t=3107
I have a tandem rating!!!
Lauren Tjaden - 2008/03/23 22:20:15 UTC

When Jim got me locked out to the right, I couldn't keep the pitch of the glider with one hand for more than a second (the pressure was a zillion pounds, more or less), but the F'ing release slid around when I tried to hit it. The barrel release wouldn't work because we had too much pressure on it.

Anyhow, the tandem can indeed perform big wingovers, as I demonstrated when I finally got separated from the tug.
...release episode.

P.P.S. This is thirty frames per second and it's over in a blink watching the video...

http://www.youtube.com/watch?v=HNXZwfR-MyY


...at real time speed. Never noticed anything before a recent review and reworking of the stills. Was astonished, but not very surprised...

06-02914
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08-03206
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14-04225
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...when I decided to go for a closer look in Final Cut while reworking the stills from this one recently.

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Tad Eareckson
Posts: 9149
Joined: 2010/11/25 03:48:55 UTC

Re: Releases

Post by Tad Eareckson »

http://www.hanggliding.org/viewtopic.php?t=34646
Are you satisfied with flex wing handling qualities?
Davis Straub - 2016/08/21 02:43:07 UTC

Yes.
Davis Straub - 2016/08/21 02:45:19 UTC

I don't believe that Mr. dayhead knows what caused the incident at the Quest Air Open.
I don't believe Quest and u$hPa do either. Can't find anything either of them have made available to indicate that anything out of the ordinary happened there on the afternoon of 2016/05/21.
Nor should he be expected to.
With Tim Herr running our sport for us he should definitely be expected not to.
Tom Galvin - 2016/08/21 03:04:41 UTC

I think he was referring to the H2 on the winch.
Oh yeah. Let's go to their website and see if there have been any updates on that one...

http://www.ushanggliding.com/
US Hang Gliding, Inc.

Nope.

Image

Go figure.
Davis Straub - 2016/08/21 03:22:43 UTC

Thanks. That goes for the other accident in Florida also.
I don't know about any accidents in Florida - or anywhere else.
Janica Lee - 2016/08/21 11:19:00 UTC
Steve Corbin - 2016/08/21 02:06:52 UTC

Without adding much weight or cost, our controllability of Hg's can be vastly improved.
How?
http://ozreport.com/forum/viewtopic.php?t=31052
Poll on weaklinks
Brad Gryder - 2013/02/21 23:25:31 UTC

There's also a way to swing your body way outside the control frame so it stays up there while you reach out with one hand and release. Come on - do some pushups this winter. :roll: See if you can advance up to some one-arm pushups.
(Wondering if you're referring to the Fledge.)
Matt Pruett - 2016/08/21 14:00:29 UTC
Minneapolis

Any ultralight fixed wing aircraft regardless of control system can be overpowered by conditions. Many pilots of fixed wing powered ultralights don't fly them mid day because of that risk. So just adding atos like controls to a flexwing won't really circumvent the issue. Excessive roll sensitivity can also be a safety issue.
Just use a really safe weak link. You'll be fine.
Birds can fly in ripping thermals, turbulence, and ratty air safely because they can continuously adjust the lifting capabilities of their wings by tucking them in. One wing starts lifting you more than the other? Just bring it in a bit.

However building such capabilities into a hangglider, and doing so in a way that doesn't compromise performance, while still being intuitive to the pilot, is no small engineering challenge.
That's OK, entelin. Hang glider people love nothing as much as engineering challenges.
With materials that are vastly stronger and lighter than what we have now some great things could be accomplished.
Yeah. Then the manufacturers could keep not building quality release systems into their planes and selling them through their dealers in Florida, Texas, Ohio, Michigan, Indiana, Illinois, Wisconsin, Minnesota with the advisory that they're not designed or intended to be towed.
Absent that I suspect any such system would add significant weight. It's actually quite remarkable how well hanggliders do work.
And how very few people we crash and kill on them.
Steve Corbin - 2016/08/21 15:49:38 UTC

You're right about that.

It seems that many if not most, of the pilots are relatively satisfied with the current tech.
And...

07-300
http://c2.staticflickr.com/8/7441/12980980635_a22762812d_o.png
Image

...shoulder mounted bent pin barrel releases.
But there are enough pilots seeing what I see to keep this conversation going.
Until Post 145 at 2016/08/31 06:16:21 UTC at which point it will start drifting down towards the bottom of the page with nothing of any actual substance resulting.
My Opinion: We berate the Pg crowd for trading safety for convenience...
http://ozreport.com/forum/viewtopic.php?t=24846
Is this a joke ?
Jim Rooney - 2011/08/28 10:15:12 UTC

Weaklinks are there to improve the safety of the towing operation, as I've stated before.

Any time someone starts in on this "sole purpose" bullshit, it's cuz they're arguing for stronger weaklinks cuz they're breaking them and are irritated by the inconvenience. I've heard it a million times and it's a load of shit. After they've formed their opinion, then they go in search of arguments that support their opinion.
while we do the same thing.

Poor roll authority has done at least as much damage on the hillsides as it has in towing.
But please don't bother citing and discussing any actual incidents from those environments either.
Yes, even an F-16 has limitations.
You mean it can't work light thermals as well as a Sport 2?
That doesn't mean no effort should be made to expand the limits.
And we can start holding our breath now while you progress in something of actual substance.
The fact that lock-outs exist proves that Hg's are deficient in the controllability context.
The fact that lockouts exist is a byproduct of the fact that hang gliders are weightshift controlled and they MUST be towed with the force routed through the pilot / control system. If you don't like that then get into something in which you sit in a cockpit and use a stick and rudders to make it go where you want it to. If you wanna do something to help with hang gliders start by recognizing that TWO hands and a good bit of muscle are needed to safely control them.
We have too many accidents, and while pilot error can be blamed a lot of the time, it doesn't mean that the gliders are Ok.
Name the ones in which pilot error ISN'T the sole cause of the crash. (And recognize that the douchebag on the front of the line is sharing in the piloting of the glider.)
It's correct that I don't know what caused all the towing accidents.
So make sure not to discuss the relevant issues in ANY of them. Also any of the tons of consequences-free incidents at altitude for which we have excellent and indisputable video documentation.
I'd like to know if any of them could have been avoided had the pilot had better control of his or her glider.
Ya think he or she might have had better control of his or her glider if he or she would've been able to blow his or her release with both of his or her hands continuously on the CONTROL bar - asshole?
entelin mentioned that excessively easy control can cause problems as well. This needs to be dealt with. In the late '70's Wills Wing Ravens were so easy to control that a restriction line was installed on trainers to limit billow shift.
I wonder if that could be used in conjunction with a LeverLink. (Funny we haven't heard anything from Jeff Roberson and no one's referenced his great revolutionary idea in this discussion, dontchya think?)
zamuro - 2016/08/21 17:17:43 UTC
New York

I am OK with current flex wings but I would welcome an effort to achieve HG performance safety with PG convenience.
Good luck.
NMERider - 2016/08/21 18:07:45 UTC
Steve Corbin - 2016/08/21 15:49:38 UTC

The fact that lock-outs exist proves that Hg's are deficient in the controllability context.
That's patently absurd. Have you ever read the article, Lockouts - Taming The Beast?
http://www.birrendesign.com/towing_LO.html

Have you read any of the extensive studies on single-line tethered kite stability?
http://www.google.com/search?q=single-line+tethered+kite+stability
The dynamics are extremely complex.

The facts that at least four pilots and one passenger...
STUDENT. The tandem instructor's eleven-year-old STUDENT. It's illegal to take PASSENGERS up on tandem flights. We don't have an exemption for that. The tandem exemption was granted to enhance the safety of our training programs.

http://c2.staticflickr.com/6/5788/23461251751_e98b9c7500_o.png
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See how great it's working?
...have been killed and many more have been injured in both surface tow and aero tow lockout accidents in the past few years...
Let's look at the last eight fatal tow crashes (all of them US 'cept for the 2013/07/21 (France)):

2011/01/15 - Shane Smith
2012/06/16 - Terry Mason
2013/02/02 - Zack Marzec
2013/07/21 - Luis Rizo / (Sara Reynaud)
2015/03/27 - Kelly Harrison / Arys Moorhead
2016/02/02 - Tomas Banevicius
2016/04/03 - Nancy Tachibana
2016/05/21 - Jeff Bohl

2011/01/15 - Shane Smith
Total fucking fringe activity. Scooter. Removed the tow ring and ran the bridle through the weak link.

2012/06/16 - Terry Mason
Total fucking fringe activity. Truck. Well known mega asshole Sam Kellner hits the dump lever in the interest of the safety of his clueless victim. Whipstall.

2013/02/02 - Zack Marzec
Total fucking fringe activity. Aero. Illegal pro toad bridle, il- or marginally legal Quest Link. Bar stuffed already just coming off the cart. Tow deliberately continued into monster thermal. Glider rockets up standing on its tail, Quest Link increase the safety of the towing operation, inconvenience whipstall and tumble. Glider survives in pretty good shape.

2013/07/21 - Luis Rizo / (Sara Reynaud)
Incompetent tug driver outclimbs and stalls the glider (which should've pulled in to force the idiot fucking tug driver back into position). Quality Street release actuated. Harmless inconvenience stall. Passenger seriously injured.

2015/03/27 - Kelly Harrison / Arys Moorhead
Total fucking fringe activity. Fucked up in every aspect possible beyond all description. Pulled down from 390 feet by rewind motor with bridle hooked over wheel extension. Not a thought of parachute deployment. Massive cover-up conspiracy.

2016/02/02 - Tomas Banevicius
Brand new Hang Two on training tow. Stationary winch and turn-around pulley. Driver hits the dump lever in the interest of the safety of his victim. Inconvenience stall.

2016/04/03 - Nancy Tachibana
Total fucking fringe activity. Stationary winch and turn-around pulley. Operation with a well documented recent history of total shit equipment and procedures. Hang One - WITH ZERO SIGNED CERTIFICATION FOR SIGNIFICANT ROLL CONTROL - pulled to three hundred feet. Turns towards downwind on the mistaken assumption that her chintzy state-of-the-art two-string had functioned, slams in on tow with the same high latent winch tension that almost killed Lin Lyons at the same smartass shit operation on 2013/06/15. (Birrenator didn't work during initial misalignment, lockout progression or impact. Only time you can be sure it's gonna increase the safety of the towing operation is when the glider's climbing hard in a near stall situation.)

2016/05/21 - Jeff Bohl
Total fucking fringe activity. Aero. United Airlines / Hang Four Comp pilot with documented history of ignoring shit release issues. Illegal pro toad bridle, inaccessible bent pin barrel release with total shit load capacity, towing cross to the runway on underpowered tug which needs to turn ninety shortly after takeoff to miss the trees. With bar stuffed to normal pro toad position instinctively makes the easy reach to an unsecured camera. Begins lockout progression which he has no chance of aborting using his Davis Appropriate Bridle. Tad-O-Link increase the safety of the towing operation an instant before idiot fucking unidentified 582 Dragonfly driver fixes whatever was going on back there by giving him the rope (and saving his own ass). Fatal inconvenience stall. Glider survives in pretty good shape.

ZERO of these incidents had SHIT to do with locking out due to the inherent limitations of hang glider roll control response.
...strongly suggests to me that the current methodology for emergency release is where we should be focusing our attention.
http://www.hanggliding.org/viewtopic.php?t=14230
pro tow set-up
Ryan Voight - 2009/11/03 05:24:31 UTC

It works best in a lockout situation... if you're banked away from the tug and have the bar back by your belly button... let it out. Glider will pitch up, break weaklink, and you fly away.

During a "normal" tow you could always turn away from the tug and push out to break the weaklink... but why would you?

Have you never pondered what you would do in a situation where you CAN'T LET GO to release? I'd purposefully break the weaklink, as described above. Instant hands free release Image
Jim Rooney - 2009/11/03 06:16:56 UTC

God I love the ignore list Image

Tad loves to have things both ways.
First weaklinks are too weak, so we MUST use stronger ones. Not doing so is reckless and dangerous.
Then they're too strong.

I have no time for such circular logic.
I had it with that crap years ago.

As for being in a situation where you can't or don't want to let go, Ryan's got the right idea. They're called "weak" links for a reason. Overload that puppy and you bet your ass it's going to break.

You can tell me till you're blue in the face about situations where it theoretically won't let go or you can drone on and on about how "weaklinks only protect the glider" (which is BS btw)... and I can tell ya... I could give a crap, cuz just pitch out abruptly and that little piece of string doesn't have a chance in hell. Take your theory and shove it... I'm saving my a$$.
Problem solved. Funny Ryan Voight isn't saying anything about his instant hands free release and Jim Keen-Intellect Rooney has been silent as a fuckin' tomb on every consequential towing incident subsequent to Zack Marzec.
I would start with a conversation with Peter Birren regarding his Link Knife emergency release.
Yeah. Sure...

http://groups.yahoo.com/group/skysailingtowing/message/6726
Weaklinks
Peter Birren - 2008/10/27 23:41:49 UTC

You trying to tell me the pilot had time to release? Not a prayer.

I know about this type of accident because it happened to me, breaking 4 ribs and my larynx... and I was aerotowing using a dolly. The sh*t happened so fast there was no room for thought much less action. But I wasn't dragged because the weaklink did its job and broke immediately on impact.

Imagine if you will, just coming off the cart and center punching a thermal which takes you instantly straight up while the tug is still on the ground. Know what happens? VERY high towline forces and an over-the-top lockout. You'll have both hands on the basetube pulling it well past your knees but the glider doesn't come down and still the weaklink doesn't break (.8G). So you pull whatever release you have but the one hand still on the basetube isn't enough to hold the nose down and you pop up and over into an unplanned semi-loop. Been there, done that... at maybe 200 feet agl.
Peter's your go-to guy for one-handed towing safety.
In fact I have already begun the process with email correspondence but did not follow-up.
Fuck that total douchebag and the horse he rode in on.
The statistics for lockout injury/fatality suggest to me that the sport has failed to adequately address the emergency release/disconnect issue.
Manned Kiting
The Basic Handbook of Tow Launched Hang Gliding
Daniel F. Poynter
1974

"A bad flyer won't hurt a pin man but a bad pin man can kill a flyer." - Bill Bennett
"Never take your hands off the bar." - Tom Peghiny
"The greatest dangers are a rope break or a premature release." - Richard Johnson
42 fuckin' years ago.

http://ozreport.com/forum/viewtopic.php?t=24846
Is this a joke ?
Cragin Shelton - 2011/09/03 23:57:33 UTC

Nice Reference Citation

Do you REALLY think that there has been no progress in knowledge about the practical applied physics and engineering of hang gliding in 37 years? OR that an early, 3+ decade old, information book written by a non-pilot is a solid reference when you have multiple high experience current instructors involved in the discussion?
You and the rest of the Ridgely/CHGA cult can suck my dick, Cragin.
Having flown extensively in the past with winch-launched R/C sailplanes I can tell you that 3-axis gliders with extreme levels of control will still lockout. Recovery was initiated via backing off on the line tension and using elevator.
Why didn't you just...
Wills Wing / Blue Sky / Steve Wendt / Ryan Voight Productions - 2007/03

NEVER CUT THE POWER...

Image

Reduce Gradually
Increase Gradually
...cut the power? Into trying to fix bad things 'cause you don't wanna start over?
The pilot controls the winch in R/C.
OH! So controlling the power going to your plane is a PILOTing function and...

http://www.hanggliding.org/viewtopic.php?t=32681
Tandem crash in LV (speculation thread)
Mark G. Forbes - 2015/04/01 03:46:29 UTC

Among ourselves, we agree (via the waiver) that we understand we're engaged in a risky sport that can cause serious injury or death. We each agree that we are personally and individually responsible for our own safety. If we have an accident and get hurt, we agree in advance that it is solely our own fault, no matter what the circumstances might be. We sign at the bottom saying that we fully understand these things, that we accept them, and that we know we are giving up the right to sue anybody if an accident happens.

Those are fundamental tenets of our sport. We are all individually responsible for ourselves and our safety. We need to see and avoid all other pilots, avoid crashing into people or property and use good judgment when flying. If someone doesn't agree with those principles, then they don't need to be involved in our sport.
...influences the safety of the flight? I dunno... Isn't it a lot simpler just to cut the RC plane loose and blame it for whatever happens subsequently?
Not so with hang gliders where pitch...
...not to mention roll...
...control is a blend of weight shift and line tension vectoring.
And even with a Rooney Link limiting the line tension (pressure) to a couple hundred pounds that can be a significant factor in which way the glider's going.

Anybody think this guy:

08-A01958
http://c2.staticflickr.com/8/7474/27517570792_6fd52c4f82_o.png
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is doing anything that requires much more than a couple hundred pounds of input effort?
The killer for hang gliders IMHO has less to do with weight-shift control and more to do with inability to get off the line or at least slacken the line before entering an irrecoverable trajectory.
The killer for towed hang gliders is all the total crap being deliberately spewed by the u$hPa/Industrial Complex.
I would start with a Link Knife on the glider and guillotine on the surface then go from there.
Fuck the Linknife and its Sainted Inventor. We don't need to cut strings to effortlessly dump five or six hundred pounds of towline tension. We need ENGINEERED ACTUATION SYSTEMS. And Peter is, has been, always will be a thousand miles south of useless in that department.

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User avatar
Tad Eareckson
Posts: 9149
Joined: 2010/11/25 03:48:55 UTC

Re: Releases

Post by Tad Eareckson »

http://www.hanggliding.org/viewtopic.php?t=34646
Are you satisfied with flex wing handling qualities?
Davis Straub - 2016/08/21 18:29:58 UTC

We received a bunch of Russian mouth releases.
"We" the fuck who?
Bruno was using one at the 2016 Big Spring Nationals.
How?

http://ozreport.com/rules.php
Big Spring Nationals Rules

They're not permitted by the rules, don't qualify as appropriate bridles.
Kinda hard on the mouth...
Yeah, we know...

http://www.hanggliding.org/viewtopic.php?t=34390
Tragedy at 2016 Quest Air Open
Davis Straub - 2016/05/28 15:39:13 UTC

They can pull your teeth out.
They can pull your teeth out. So how many teeth were pulled out? And speaking of pulling teeth out... How many do we hafta pull outta you Flight Park Mafia motherfuckers to get you to tell us what you're now mandating for AT weak links, what their breaking strengths are, and what problems they're supposed to be solving for us?
...but a good start.
But a good start on WHAT?

http://ozreport.com/forum/viewtopic.php?t=31052
Poll on weaklinks
Davis Straub - 2013/03/10 14:09:22 UTC

I've had no problem releasing my barrel release hundreds of times.
Sounds to me like a solution for a nonexistent problem. Or are you saying that they represent enough of a good start that Jeff Bohl would've only been HALF killed if these had fallen under the definition of an appropriate bridle at the Quest Air Open?

If these DO, in fact, represent a "good start" then...

http://ozreport.com/forum/viewtopic.php?t=31052
Poll on weaklinks
Jim Rooney - 2013/03/03 19:37:19 UTC

It saddens me to know that the rantings of the fanatic fringe mask the few people who are actually working on things.
...why didn't the few people who are actually working on things come up with something as good or better before the 2016/05/21 fatal crash at Quest? Too tied up with the new Tad-O-Link testing program? And where can I go to find the comments on this thing from the few people who are actually working on things?

You had a proven system that worked...

http://ozreport.com/forum/viewtopic.php?t=30971
Zach Marzec
Jim Rooney - 2013/02/12 18:00:27 UTC

Your second statement is why.
I just buried my friend and you want me to have a nice little discussion about pure speculation about his accident so that some dude that's got a pet project wants to push his theories?

Deltaman loves his mouth release.
BFD

I get tired as hell "refuting" all these mouth release and "strong link" arguments. Dig through the forums if you want that. I've been doing it for years but unfortunately the peddlers are religious in their beliefs so they find justification any way they can to "prove" their stuff. This is known as "Confirmation Bias"... seeking data to support your theory... it's back-asswards. Guess what? The shit doesn't work. If it did, we'd be using it everywhere. But it doesn't stand the test of reality.

AT isn't new. This stuff's been worked on and worked over for years and thousands upon thousands of tows. I love all these egomaniacs that jump up and decide that they're going to "fix" things, as if no one else has ever thought of this stuff?

But back to the root of my anger... speculation.
Much like confirmation bias, he's come here to shoehorn his pet little project into a discussion. Please take your snake oil and go elsewhere.

Tune him up?
Yeah, sorry... no.
Now you're trying to replace it with something that doesn't work in reality and have made a good start. I'm really not liking the smell of any of this.
2016/08/21 19:16:09 UTC - 3 thumbs up - NMERider
2016/08/22 18:19:31 UTC - 3 thumbs up - raquo
Brian Scharp - 2016/08/21 19:07:50 UTC
NMERider - 2016/08/21 18:07:45 UTC

The killer for hang gliders IMHO has less to do with weight-shift control and more to do with inability to get off the line or at least slacken the line before entering an irrecoverable trajectory. I would start with a Link Knife on the glider and guillotine on the surface then go from there.
http://www.hanggliding.org/viewtopic.php?t=34243
Fatal HG crash in Tres Pinos CA 4-3-2016
Dan DeWeese - 2016/04/06 20:37:43 UTC

I thought a linkknife could be rigged so that if the AofA gets too high or too far offline, it cuts away the tow line and frees the glider.
NMERider - 2016/04/06 21:11:00 UTC

I just fired off a letter to Peter Birren for his input on the utility of the Link Knife in this situation.
Doug Hildreth - 1990/09

1990/07/05 - Eric Aasletten - 24 - Intermediate - 2-3 years - UP Axis - Hobbs, New Mexico - Platform tow - Fatal / Head

Reasonably proficient intermediate with over a year of platform tow experience was launching during tow meet. Homemade ATOL copy with winch on the front of the truck. Immediately after launch, the glider pitched up sharply with nose very high. Apparently the angle caused an "auto release" of the tow line from the pilot, who completed a hammerhead stall and dove into the ground. Observer felt that a dust devil, invisible on the runway, contributed to or caused the relatively radical nose-up attitude. Also of concern was the presumed auto release which, if it had not occurred, might have prevented the accident. Severe head injury with unsuccessful CPR.

The reporter was certain he saw a dust devil begin on the edge of the runway in a location that would support an invisible dust devil on the runway crossing the path of the truck and glider.

Recommendation of the reporter: If towing is done in gusty, turbulent or thermal conditions, a row of wind flags should be on each side of the runway at 50-75 foot intervals to warn of invisible turbulence. 1) Pilots should attach their release line in such a way that there will not be an auto release. 2) Weak links should be strong enough so that breaks right after launch will not occur.
NMERider - 2016/08/21 19:29:49 UTC

Point taken however,
We're not talking about auto releases or pitch-up accidents.
Nah, those don't really exist in the universe of Hewett physics based hang glider towing.
Furthermore even assuming there was no auto release accident who is to say there would not have been an incipient lock out with disastrous results?
Nobody. In the religion of Hewett based hang glider towing nothing bad that isn't the fault of a totally incompetent pilot can happen to a any glider once the power is cut. Anybody who says otherwise is just making...

http://www.chgpa.org/forums/viewtopic.php?f=2&t=2467
weak links
Jim Rooney - 2007/08/01 19:49:30 UTC

It's more of this crappy argument that being on tow is somehow safer than being off tow.
...more of this crappy argument that being on tow is somehow safer than being off tow and doesn't need to be involved in our sport.
Unseen turbulence OTOH is a very serious issue and is addressed in the one report. I applaud the use of flags and streamers.
Along with...

http://ozreport.com/12.081
Weaklinks - the HGFA rules
Davis Straub - 2008/04/22 14:47:00 UTC

At the 2008 Forbes Flatlands Greenspot for the first time was used as the standard weaklink material (thanks in large part to the efforts of Bobby Bailey). We applaud these efforts to improve the safety of aerotowing by using a better weaklink material.
...Bobby Fucking-Genius Bailey's efforts to improve the safety of aerotowing by using a better weaklink material.

So let's leave him killed instantly as the result of a whip inconvenience rather than risk killing him much more dead in the lockout he'd have probably gotten into if we'd allowed him to stay on tow. And let's make flying with Birrenators mandatory for all tow flights and recognize Peter with another NAA Safety Award.
These can prevent tragedy.
Not in ANY of the eight most recent fatal tow crashes I listed. Not in any recent towing crash incident I can remember. And John Claytor with his pro toad placebo release and fuzzed out Greenspot at the ECC on 2014/06/02... Launched on an improvised runway in a howling crosswind, broke his neck, ruined his life, and THEN the Safety Committee called the day due to conditions.
Matt Christensen - 2016/08/21 20:44:18 UTC

Love my glider, it is an amazing aircraft! Blaming comps for the current development of hang gliders makes me laugh, but go ahead, because modern hang gliders are AWESOME!
And have such awesome release and weak link systems.
I always find it interesting how it often seems those with the least, if any, towing experience; seem to be experts on the matter.
Or fuckin' Dragonfly drivers who know everything about everything 'cause they fly gas guzzlers up and down all week long.
I am all for advancement and evolution in design...
As long as there's nothing Rube Goldberg involved. That's why I don't find anything (I know that) Tad has developed worthy of any glance - let alone...

http://www.chgpa.org/forums/viewtopic.php?f=2&t=233
AT releases
Hugh McElrath - 2005/03/05 17:02:56 UTC

Thanks, Tad. I was too green to fully appreciate your system when you showed it to me a couple of years ago. Now I'm more interested. Do I have to fabricate this myself from parts or are you in business?
http://www.chgpa.org/forums/viewtopic.php?f=2&t=3347
Tad's barrel release tested
Janni Papakrivos - 2008/06/30 15:35:44 UTC

Tad showed me the release system he installed in Hugh's glider. I was amazed at the quality and complexity of the system. Being able to tow and release without ever having to take your hands off the base tube is wonderful and much safer.
http://www.chgpa.org/forums/viewtopic.php?f=2&t=939
Weak link breaks?
Dan Tomlinson - 2005/08/31 00:33:01 UTC

Tad's post is difficult to read but I've seen his work. His release mechanism is elegant in its simplicity and effectiveness.
http://www.hanggliding.org/viewtopic.php?t=12587
weak links (here we go)
Patrick Halfhill - 2009/06/21 23:22:23 UTC

You and I met at the ECC a few years ago. We spent 45 minutes or more together going over your system. I saw it first hand. I was quite impressed with the quality of engineering and the time you spent on it.
...comment.
...but there won't be a design that will completely offset human error, especially close to the ground.
Sure there will. A loop of 130 pound Greenspot on one end of a bridle increases the safety of the towing operation for anyone. Proven system that works. Downside...

http://ozreport.com/forum/viewtopic.php?t=31052
Poll on weaklinks
Davis Straub - 2013/03/06 18:29:05 UTC

I'm happy to have a relatively weak weaklink, and have never had a serious problem with the Greenspot 130, just an inconvenience now and then.
Just a bit of inconvenience now and then.
Having said that, I would love to hear more from the great engineering minds that have it figured out here...
http://www.hanggliding.org/wiki/HG_ORG_Mission_Statement
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Tad Eareckson
Posts: 9149
Joined: 2010/11/25 03:48:55 UTC

Re: Releases

Post by Tad Eareckson »

http://www.hanggliding.org/viewtopic.php?t=34646
Are you satisfied with flex wing handling qualities?
Robert Kesselring - 2016/08/22 00:20:19 UTC

I'm with Dayhead
When choosing a glider to fly, I had to accept a compromise...
Name somebody who flies anything in a different position.
I chose a Horizon 180. I'm in the middle of the weight range for it.
If I had chosen a 160, I would have had better roll authority, but a sink rate that would have made it all but impossible to soar.
Rubbish.
If I'd gone for a big wing like a Falcon 225, I would have had an excellent sink rate, but a glider that was difficult to control in all but the mildest conditions.
If somebody made a no-compromise wing with the sink rate of a big wing and the responsive handling of a little wing, I'd be on the wait list to get one, and I suspect it would be a long, long list.

(anybody listening? WillsWing? Northwing?)
So we can put you down as being totally cool with easily reachable releases, pro toad bridles, and whatever weak link Davis orders us to use?
Matt Pruett - 2016/08/22 01:50:38 UTC
Davis Straub - 2016/08/21 18:29:58 UTC

We received a bunch of Russian mouth releases.
I got one also, I have not tried it yet, but I plan to this fall. I have a strong suspicion that a mouth release could save lives.
Ya think?
Trading glider control to actuate a release is really an unfortunate choice that other methods to some degree force you to make.
And you're forced to be forced to make that unfortunate choice by...

http://ozreport.com/forum/viewtopic.php?t=22308
Better mouse trap(release)?
Jim Rooney - 2010/12/16 18:47:05 UTC

A few years ago, I started refusing to tow people with home made gear.
I like the idea of improving gear, but the lack of appreciation for the world they were stepping into didn't sit with me.
For example... flying with the new gear in mid day conditions?
Are you kidding me????

Approach it for what it is... completely untested and very experimental gear which will likely fail in new and unforseen ways as it tries it's damndest to kill you... and then we can talk.
...the Davis camp shits that hijacked the sport from competent and responsible pilots.
NMERider - 2016/08/21 18:07:45 UTC

The killer for hang gliders IMHO has less to do with weight-shift control and more to do with inability to get off the line or at least slacken the line before entering an irrecoverable trajectory. I would start with a Link Knife on the glider and guillotines on the surface then go from there.
Almost all of my flights have been aerotow. I use a Linknife at the apex of a v-bridle attached to a weak dog leash which keeps the actuation line taunt regardless of how I move. The force required to actuate it is very small and consistent, a little tug and your off, no chance for wrapping, etc. Though it doesn't solve the problem of having to move a hand to pull it, which I think is the larger issue.
Good. We can sure use assholes like you well clear of the gene pool.
Robert Kesselring - 2016/08/22 00:20:19 UTC

When choosing a glider to fly, I had to accept a compromise...
All aircraft are a compromise. Control surfaces cost weight. I would be curious though to hear if atos pilots find that they can still be overpowered in a thermal like flexwings can.
Release systems don't need to and shouldn't be compromises. Tost sailplane release - fuckin' bulletproof. No decades long discussions about them.
NMERider - 2016/08/22 03:36:13 UTC

Have you considered whether the larger issue may have more to do with executing the release before you find yourself in an unrecoverable trajectory with the ground?
Bill Bryden - 2000/02

Dennis Pagen informed me several years ago about an aerotow lockout that he experienced. One moment he was correcting a bit of alignment with the tug and the next moment he was nearly upside down. He was stunned at the rapidity. I have heard similar stories from two other aerotow pilots.
Dennis Pagen - 2005/01

I pulled in all the way, but could see that I wasn't going to come down unless something changed. I hung on and resisted the tendency to roll to the side with as strong a roll input as I could, given that the bar was at my knees. I didn't want to release, because I was so close to the ground and I knew that the glider would be in a compromised attitude. In addition, there were hangars and trees on the left, which is the way the glider was tending. By the time we gained about 60 feet I could no longer hold the glider centered--I was probably at a 20-degree bank--so I quickly released before the lockout to the side progressed. The glider instantly whipped to the side in a wingover maneuver.
If a lockout seems incipient (and you know it's only going to get worse when you release one hand) isn't there a limited window of time in which you must commit to cutting the line?
Total rot. This is the Industry line to put all the blame on...
Joe Gregor - 2004/09

There is no evidence that the pilot made an attempt to release from tow prior to the weak link break, the gate was found closed on the Wallaby-style tow release.
...the dead pilot and whitewash the shoddy junk they've sent their latest victim up on.

Quest tells us...

http://www.questairforce.com/aero.html
Aerotow FAQ
Quest Air Hang Gliding

Weak Link

The strength of the weak link is crucial to a safe tow. It should be weak enough so that it will break before the pressure of the towline reaches a level that compromises the handling of the glider but strong enough so that it doesn't break every time you fly into a bit of rough air. A good rule of thumb for the optimum strength is one G, or in other words, equal to the total wing load of the glider. Most flight parks use 130 lb. braided Dacron line, so that one loop (which is the equivalent to two strands) is about 260 lb. strong - about the average wing load of a single pilot on a typical glider. For tandems, either two loops (four strands) of the same line or one loop of a stronger line is usually used to compensate for nearly twice the wing loading. When attaching the weak link to the bridle, position the knot so that it's hidden from the main tension in the link and excluded altogether from the equation.
...a properly sized weak link will break before our glider handling can be compromised but...
IMPORTANT - It should never be assumed that the weak link will break in a lockout.
ALWAYS RELEASE THE TOWLINE before there is a problem.
...it actually won't before we get killed so release when we're straight and level - just like...

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...Dave was when he might have been locked out a little bit - make the easy reach to your release before there's any possibility of anything bad happening.

In free flight when you have a wing start going up do you immediately bail because you have no way of knowing whether or not you're on the edge of something that's gonna tumble you or do you fight the roll to get the glider level and into smoother stronger lift? Tell me what people are gonna do differently on tow.

If you're gonna bail every time you start to get bumped and/or use a Davis Link...

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...to increase the safety of the towing operation ya might as well stay on the fuckin' ground until the evening glass off 'cause the danger of the emergency landing and relight is ALWAYS gonna outweigh the danger of continuing a still controllable tow.
I'd be interested in your thoughts...
The motherfucker doesn't have any.
...and training...
From whom? The flight parks who are telling their students not to use weak links on both ends of the bridle because that doubles the towline tension needed to blow tow?
...in this regard.
Furthermore... PEOPLE make MISTAKES. Even the people who aren't towed up by these shit operations before having a fucking clue how to roll control a glider make mistakes that require BOTH no further control compromise AND an immediate release. Jeff Bohl didn't necessarily deserve to die 'cause he reached for an unsecured camera right after takeoff. And even if he DID deserve to die he inconvenienced a lot of other pilots who'd come a long way to Quest and had wanted to fly another comp day. And there are probably a few people who witnessed the impact and had their enthusiasm for pursuing the sport dampened just a bit.
Davis Straub - 2016/08/22 04:50:15 UTC

I don't think that we know that any of the three towing incidents were lock outs.
None of them were the classic lockouts in which an actual pilot on tow has his roll control authority overwhelmed by a thermal blast to the point at which recovery on tow is possible. Steve Corbin's just assuming that's what's going on - without having made the slightest effort to understand what's actually going on - to use as ammunition in his campaign to get somebody else to revolutionize glider design.
NMERider - 2016/08/22 04:51:30 UTC

The fact that lock-outs exist does not prove that Hg's are deficient in the controllability context. It does suggest that there may be issues with the manner in which towing is conducted.

Try stalling a sailplane under winch tow and see how long before you hit the ground at 150mph. Sailplanes lock out if the manner in which the towing is conducted exceeds the limitations of the sailplane and/or conditions. The same holds true for hang gliders. They both have limitations and well, let's face it--we are all human and we make mistakes...
Ex fuckin' zactly.
...and sometimes those mistakes result in trying to operate outside of the limitations of our equipment and /or the conditions.
Rubbish.

First of all, we're discussing aerotow with pilots who know left from right and how to get there. It's fuckin' pointless to talk about students who've been thrown in way over their heads and platform in which it's nearly impossible for anything bad to happen without Sam Kellner around.

We're also talking aerotow in soarable conditions which is the only real point to aerotowing.

And in soarable thermal conditions anything can happen up to and including dust devil.

Anybody who has any business aerotowing KNOWS anything can happen and - no matter how well he's equipped - is SCARED until after he's up through the kill zone and NERVOUS the rest of the climb.

Anybody who's properly equipped WILL abort the tow as quickly as he can react in response to a lockout onset.

Anybody flying a release that stinks on ice will do whatever it is that allows him to live as long and crash as softly as possible. And that's ALWAYS gonna be flying the fucking glider.

Lock out in a roll at altitude and it doesn't matter much what you do. You can release or wait for whatever you or the tug is using for a weak link to break.
But to posit the notion that lock-outs prove anything exists other than lock-outs really is baloney. The existence of lock-outs should give us all pause to consider whether we can effectively prevent one from happening to each of us at any given point in time.
We can't.

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We can just recognize that we can be rendered pretty useless by the combined and misaligned forces of hundred plus horsepower engines and Mother Nature and make reasonably sure that we have a few hundred yards of reasonable air in front of us to start off and have equipment to lose the horsepower as quickly an safely as possible.
In other words, there comes a time in which to ask one's self -- Am I likely to have a lock-out here?
I always assume that I will. Same as I always assume I'm not hooked in as I'm about to commit on a launch ramp.
Maybe I'd be better off not towing right now?
Sure. Wait for the evening sled conditions.

http://ozreport.com/forum/viewtopic.php?t=24846
Is this a joke ?
Jim Rooney - 2011/08/28 19:39:17 UTC

Weak links break for all kinds of reasons.
Some obvious, some not.

The general consensus is the age old adage... "err on the side of caution".

The frustration of a weaklink break is just that, frustration.
And it can be very frustrating for sure. Especially on a good day, which they tend to be. It seems to be a Murphy favourite. You'll be in a long tug line on a stellar day just itching to fly. The stars are all lining up when *bam*, out of nowhere your trip to happy XC land goes up in a flash. Now you've got to hike it all the way back to the back of the line and wait as the "perfect" window drifts on by.

I get it.
It can be a pisser.

But the "other side"... the not cautions one... is not one of frustration, it's one of very real danger.
Better to be frustrated than in a hospital, or worse.
No exaggeration... this is the fire that the "other side" is made of. Best not to play with it.
You never really wanted to get up to cloudbase and play around for a few hours anyway.
...or Am I prepared to handle a lock-out?
No human can "HANDLE" a lockout. The definition of a lockout is a situation in which your control authority is overwhelmed and you're going in a direction not of your choosing with no possibility of recovering the tow. You can just make sure that you're equipped to REACT TO a lockout as effectively as possible.

But the percentage of people IN THE WEST who care about doing that is so microscopic that I don't know why we're having this discussion - AGAIN. Everybody has much more fun making cracks about Tad's Rube Goldberg system and getting teeth pulled out by Kaluzhin releases.
Now I'm all for making flex-wing hang gliders more controllable if it can be done without adding greater complications and uncertainties.
If they could've been they would've been. But the manufacturers won't provide safe built in release systems like ALL sailplanes have because hang gliders aren't intended to be tow launched.
Sometimes, simpler is safer in the long run.
'Specially when you're designing releases. You must never consider the complexity of the actions required to blow them. And when the pilot gets killed you can ALWAYS blame him for having tried to fix a bad thing because he didn't wanna start over and nobody will ever be able to prove you wrong. And then you can tell all your students and customers what an asshole the guy was.
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Tad Eareckson
Posts: 9149
Joined: 2010/11/25 03:48:55 UTC

Re: Releases

Post by Tad Eareckson »

http://www.hanggliding.org/viewtopic.php?t=34646
Are you satisfied with flex wing handling qualities?
Doug Martens - 2016/08/22 05:53:52 UTC
Reseda, California

From what I understand the lockout in Florida by the Comp glider, the pilot knew he was locked out and rode it out thinking he could eventually overcome the condition. Possibly trying to avoid breaking the link and then having to tow up again wasting time.
Yeah, he died on impact but we know what he was thinking 'cause some assholes told you. Reminds me a lot of Steve Wendt and Richard Bryant telling us what Holly Korzilius was thinking on the aerotow crash that wiped her memory of it.
Greblo always says when you get away with a safety lapse over and over you begin to accept it as being a new norm.
Like:

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- flying on the control tubes?

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- always doing your hook-in check a few steps into your launch run?
An over confident pilot at a competition is his own business.
What a load o' crap.
I always say the ground doesn't care what rating card you carry in your pocket.
Yeah, I'll bet as a United Airline pilot he never gave issues like this much thought. But of course as an airline pilot he wasn't issued total crap equipment "designed" by total fucking morons.
Should comps require a complex technological release?.
Yeah. And they should also keep pissing all over simple beautifully engineered systems already developed and flown for years.
I saw a minor landing accident today at Sylmar with a female pilot with a nasty bruise but the soft grass made it less sever that it could have been.
Don't worry. Once she gets her flare timing perfected issues like that will be history.
Davis Straub - 2016/08/22 06:01:22 UTC

I'm sorry to say that you would actually have a hard time knowing what happened in Florida. I was there in line one person behind him. Even I don't know for sure what happened.
And we have no fuckin' clue what really happened in the Zack Marzec incident... We just know that right afterwards...

http://ozreport.com/forum/viewtopic.php?t=31052
Poll on weaklinks
Jim Rooney - 2013/03/05 19:42:58 UTC

My god my head hurts.

Wow...
So you know what happened then?
OMG... thank you for your expert accident analysis. You better fly down to FL and let them know. I'm sure they'll be very thankful to have such a crack expert mind on the case analyzing an accident that you know nothing about. Far better data than the people that were actually there. In short... get fucked.

Again, tell me how all this nonsense is about "safety"?

So, a stronger weaklink allows you to achieve higher AOAs... but you see high AOAs coupled with a loss of power as *the* problem? So you want something that will allow you to achieve even higher AOAs?
Are you NUTS?

I'm tired of arguing with crazy.
As I said many times... there are those that listen with the intent of responding... you unfortunately are one.

You've done a great job of convincing me never to tow you.
Thank you for that.
Mission accomplished.
...everybody and his dog suddenly and inexplicably became happy with Tad-O-Links.
But the stories that I have heard from even better witnesses than I do not jibe at all with your comment.

But, hell, this is the internet, so fire away.
So why all this sudden interest in the Kaluzhin release?
Ryan Voight - 2016/08/22 06:15:59 UTC
NMERider - 2016/08/22 04:51:30 UTC

The fact that lock-outs exist does not prove that Hg's are deficient in the controllability context. It does suggest that there may be issues with the manner in which towing is conducted.
I agree this is an absurdly illogical conclusion. A lock-out is usually (always?) the result of inadequate lateral control. This could be from a lacking aircraft design capability... but could be just as easily from PILOT error or inadequacy.
What's a pro toad tumble following a Rooney Link pop at 150 feet in a monster thermal usually (always?) the result of? Seems to be a real mystery within the AT community...
Wills Wing / Blue Sky / Steve Wendt / Ryan Voight Productions - 2007/03

NEVER CUT THE POWER...

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Reduce Gradually
Increase Gradually
Any thoughts?
There are too many pilots (even in the tiny bubble of hang gliding) that tow too often WITHOUT ever locking-out, to say it's an aircraft issue (because then it would be an issue for everyone!)
I actually aerotow, Ryan. And I've locked out, flying two point, TWICE - at altitude where they were total nonissues and nobody would know about them if I didn't post anything. And I was an ace dune pilot when you were in diapers so I know how to fly a hang glider. You get a powerful offset bullet thermal between you and the tug you WILL lock out.
Are pilots too casual about staying "on top of" the glider while towing?
Yeah Ryan. That's what's going on in your little world of glassy sled conditions - like the those in which your dad demonstrates PERFECT...

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...narrow-dry-riverbed-with-large-rocks-strewn-all-over-the-place landings.
Are there large populations of hang glider pilots with lackluster control skills to begin with?
Yeah Ryan. That's what's going on. People are aerotowing - which is roll unstable as hell and requires the constant input of minor corrections in anything but glassy sled conditions - who suddenly develop lackluster control skills to begin with.
Are tows occurring in conditions that are possible, if not likely or almost guaranteed, to require the pilot to actively fly the glider to prevent the dreaded lock-out?
Why should you hafta actively fly the glider, Ryan? When you roll away from the tug the towline pulls you back under the high wing and weight-shifts it back level. Just like when you're running across the field in S-patterns without using your hands.
And... although they don't happen THAT often... what percentage of lock-outs result in accident/injury/death? Are there possibly details in those specific cases that matter?
Very few. 'Cause you tend not to have much in the way of fast and strong vertical air movement in the kill zone / below two hundred feet. Same reason really low saves are really rare. At five hundred feet I've almost always thrown in the towel and started approach mode.
To say people die from lock outs so towing is dangerous, is to say that people die from hang gliding so all aviation is dangerous. Or people die from hyperventilation so breathing heavy is dangerous?
Right. Dangerous low level thermal induced lockouts - lateral and vertical - are extremely rare so it's OK to fly with easily reachable bent pin releases, pro toad bridles, and standard aerotow weak link pitch and lockout protectors which inconvenience us every now and then.
I agree, compared to the world of flying "things" available in the 21st century, hang gliders have more limited control-ability. This comes as a trade off for hanging head-first below a wing and flying like superman with nothing but our own bodies to steer us around! Don't blame the aircraft if people CHOOSE to fly it, and FAIL to maneuver it adequately for what they are trying to do.
And FAIL to let Mother Nature know who's really boss when the shit hits the fan.
I think it's (mostly) a people-make-poor-choices problem... and maybe some of a people-have-skill-shortcomings-and-don't-know-it-and-their-friends-say-nothing
Explain Zack Marzec...

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...motherfucker.
But if you can make a hang glider that handles quicker and easier, without giving up the pure simplicity that is hang gliding... hell yea, no reason not to improve on what we have!
- Yeah...

http://ozreport.com/forum/viewtopic.php?t=22308
Better mouse trap(release)?
Jim Rooney - 2010/12/16 18:47:05 UTC

Oh, I've heard the "everything we do is an experiment" line before.
The trouble is, it's not.

I've seen experimentation with towing gear more than anything else in HG.
I've not seen many go out and try to build their own sails for example. When someone does, they're very quickly "shown the light" by the community. Example... the guy that was building the PVC glider in California somewhere.
But for some reason, towing gear is exempt from this.

The difference is what we do has been done by thousands of people already. It's been tested... a lot.
What we do is free of the experimentation part.
It's still dangerous, but not at the level of building new gear is. Not even close.
Right.

- Just don't fuck with any of our Industry Standard tow equipment. Proven systems that work. Extremely long track records.
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