Departing the launch cart - Davis Show

General discussion about the sport of hang gliding
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Tad Eareckson
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Departing the launch cart - Davis Show

Post by Tad Eareckson »

Tad Eareckson - 2022/05/24 2022/05/24 22:00:00 UTC

I've just established this topic with 63 posts pulled out of the rather bloated "instructors and other qualified pilot fiends" topic which had maxed out at 1865 entries with my 2021/03/21 13:16:07 UTC submission. Focus is dolly launched AT.
---
Picking up from:
http://www.kitestrings.org/post9011.html#p9011

http://ozreport.com/forum/viewtopic.php?t=46493
Cart dynamics
Brad Gryder - 2016/02/09 17:02:53 UTC

Try here:
http://ozreport.com/forum/viewtopic.php?t=9230
Departing the launch cart
Jim Gaar - 2016/02/09 17:29:12 UTC

Yes good "nuggets" in there and about...
You have no idea.
Christopher LeFay - 2016/02/19 04:13:11 UTC

Great read- made the wife chew through it, too. Thanks much.
Gold mine. Major project ahead.
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Tad Eareckson
Posts: 9149
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Re: Departing the launch cart - Davis Show

Post by Tad Eareckson »

http://ozreport.com/11.167
2007 Worlds - nobody died
Davis Straub - 2007/08/23 14:58:11 UTC

It wasn't an accident

(Big Spring, Texas)

You can leave safety up to the individual pilots or you can build safety into your system. There was only two minor accidents that resulted in injury to pilots during the 2007 Worlds. That is, if we ignore the pool party. Beer, vodka, Red Bull, and water - a dangerous combination.

We planned for two years for safety building on the record of the Flytec Championships held at Quest Air and the previous meets in Big Spring. There was an absolute requirement for certain types of bridles, weak links, and secondary releases. The tug pilots were experienced and well trained. The ground crew leaders were very experienced and very much in charge.

Every pilot had to document their aerotowing experience and every pilot was checked out by Drew to determine if they could safely tow. Unlike at the previous women's worlds in 2006 at Quest Air, every pilot displayed sufficient skills to two safely.

Drew Harris and Flavia set up the staging lines after many vigorous discussions of how they should be laid out. These debates allowed for all the concerned parties to state their views. The ground crew was concentrated and never over taxed or spread out through more than two lines. This meant that there was always more than sufficient crew to assure safety.

Every pilot was checked and reassured. Ever pilot was told every time to hold onto the cart (the orange hose handles were the best - see below) until they were flying. The one accident that happened on the line came when a pilot had taken off his wheels (he was the only pilot flying with wheels) and when he came off the cart slow and too early. His English wasn't good so he may not have understood the requests for him to hold on and he was one of the least experienced pilots at the Worlds.

The staging lines were widely separated separating the tug traffic to avoid collisions. The Big Spring airport is huge and we had plenty of room.

Because we were launching from an asphalt taxi way and not a grass field, it was super important that pilots hold on hard to the carts. The cart would start easily (keeping the weaklink from breaking) and would get going fast quickly, which had a different feel than the grass fields. Pilots were taught to make sure that they can enough speed to fly out of any trouble if a weaklink broke.

We did have one minor injury at a landing field that I chose. The field was inappropriate for landing (it was part of a small air field) as it contained power lines, fences, and stakes. The Google Earth photo was not sharp enough to provide the task committee with a clear picture of what was there. I should have seen that problem. Numerous pilots had difficulty landing there, but one pilot had to have five stitches (he flew the next day).

This is the first worlds to use Google Earth to position the goal points as well as give pilots an idea of where they were going and what it would look like when they got there. That was for the most part very successful. I used a projector hooked up to my computer and I could display the weather, the task (in SeeYou) and the task in Google Earth.
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Tad Eareckson
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Re: Departing the launch cart - Davis Show

Post by Tad Eareckson »

http://ozreport.com/11.167
2007 Worlds - nobody died
Davis Straub - 2007/08/23 14:58:11 UTC

It wasn't an accident

(Big Spring, Texas)

You can leave safety up to the individual pilots...
That would be TOTALLY FUCKING *INSANE*! You'd have people:

- insisting on towing with...

http://www.chgpa.org/forums/viewtopic.php?f=2&t=2467
weak links
Jim Rooney - 2007/07/22 22:30:28 UTC

I've heard it a million times before from comp pilots insisting on towing with even doubled up weaklinks (some want no weaklink). I tell them the same thing I'm telling you... suck it up. You're not the only one on the line. I didn't ask to be a test pilot. I can live with your inconvenience.
...even doubled up...
...or 2500+ feet if you're aerotowing.
http://ozreport.com/forum/viewtopic.php?t=24846
Is this a joke ?
Davis Straub - 2011/08/28 15:26:28 UTC

Then again, Russell Brown had us double up behind him after six breaks in a row at Zapata. We couldn't figure out why we had so many breaks so quickly. Maybe just coincidence.
...weak links. Some wouldn't want any weak link at all! They'd be totally dependent on the Dragonfly's tow mast breakaway protector...

http://www.hanggliding.org/viewtopic.php?t=31717
Weak link?
Davis Straub - 2014/08/20 19:48:26 UTC

Many of us are now using 200 lb test line from Cortland.
http://www.hanggliding.org/viewtopic.php?t=31747
Lockout
Davis Straub - 2014/09/01 15:22:41 UTC

I can tell you that I fly with a 200lb weaklink on one side of my 750lb pro tow bridle. I am happy with it.
...(the way pretty much all of us are now). They might wanna be flying with weak links proportional to their flying weights or glider capacities instead of...

http://ozreport.com/forum/viewtopic.php?t=31052
Poll on weaklinks
Jim Rooney - 2013/03/04 19:31:36 UTC

We all play by the same rules, or we don't play.
The law of the land at comps was 130lb greenspot or you don't tow. Seriously. It was announced before the comp that this would be the policy. Some guys went and made their case to the safety committee and were shut down. So yeah, sorry... suck it up.
...playing by the same rules.

- wanting to fly...

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.

That's what people fail to realize.
It's no small difference. It's a huge chasm.

Notice how I'm not saying to not do it.
Go forth and experiment. That's great... that's how we improve things.
I'm just warning you of that chasm.

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.
...homemade equipment - instead of the cheap bent pin shit with the extremely long track records that you and your pigfucker buddies sell and force everyone to use.

And the idea of INDIVIDUAL PILOTS making decisions on and taking personal responsibility for...

http://http://www.hanggliding.org/viewtopic.php?t=21868
Don't Forget your Hang Check!
Eric Hinrichs - 2011/05/13 21:31:06 UTC

I went to Chelan for the Nationals in '95 as a free flyer. They were requiring everyone to use the Australian method, and you were also not allowed to carry a glider without being hooked in.

This was different for me, I hook in and do a full hang check just behind launch right before I go. I was also taught to do a hooked in check right before starting my run, lifting or letting the wind lift the glider to feel the tug of the leg loops.

So I used their method and I'm hooked in, carrying my glider to launch and someone yells "Dust devil!" Everyone around runs for their gliders (most of which are tied down) and I'm left standing alone in the middle of the butte with a huge monster wandering around. I heard later that it was well over three hundred feet tall, and some saw lightning at the top. After that it was clear that no one is going to decide for me or deride me for my own safety methods, someone else's could have easily got me killed.
http://ozreport.com/forum/viewtopic.php?t=924
Tragedy at Team Challenge
Davis Straub - 2005/10/01 23:12:07 UTC

Well, very simply we could make a new rule for competition. If you are seen in your harness but not hooked into your glider you are automatically disqualified.
...their safety makes me ABSOLUTELY *SICK*! Image

Nah, we need people who've been at an around all this plenty long enough to understand what's what and who's who...

Image
http://ozreport.com/pub/images/fingerlakesaccident2.jpg
http://ozreport.com/pub/images/fingerlakesaccident3.jpg
Image

...to tell us muppets all what's what and who's who, force us to buy and use the cheap bent pin shit with the extremely long track records that they and their pigfucker buddies sell, and mandate flagrant violations of all the important u$hPa SOPs and FAA aerotowing regulations.
...or you can build safety into your system.
Meaning *YOU* and your pigfucker buddies...

http://ozreport.com/forum/viewtopic.php?t=25015
Zippy pounds in
Davis Straub - 2011/09/02 18:37:09 UTC

Concussions are in fact very serious and have life long effects. The last time I was knocked out what in 9th grade football. I have felt the effects of that ever since. It changes your wiring.
...can build (YOUR idea of) safety into OUR system.

http://4.bp.blogspot.com/-bRrpHNa68iY/UQ6Pv9gRZyI/AAAAAAAAjTg/Hc22bx5122Q/s2048/20943781_BG1.jpg
Image

And there won't be shit any of us muppets will be able to do about it.
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Tad Eareckson
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Re: Departing the launch cart - Davis Show

Post by Tad Eareckson »

http://ozreport.com/11.167
2007 Worlds - nobody died
Davis Straub - 2007/08/23 14:58:11 UTC

There was only two minor accidents that resulted in injury to pilots during the 2007 Worlds.
What a fantastic record! 'Specially compared to the many bloodbaths in which you've been involved and over which you've presided in the past!
That is, if we ignore the pool party. Beer, vodka, Red Bull, and water - a dangerous combination.
Another dangerous combination - Davis and his pigfucker buddies and hang gliding.
We...
Who the fuck is "WE" and what are our qualifications?
...planned for two years...
Nonstop. Reminds me a lot of:

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.
We have these few highly qualified but totally anonymous people tirelessly, fervently, perpetually working on things - despite the fact that we have all these proven systems that work and have very long track records - but never seem to see any actual products or positive changes of any kind.
...for safety...
What was it that occupied most of our time over the course of these two years of nonstop planning? What are some of the insights, procedures, equipment standards we came up with that never occurred to anyone before?

And when we had these lightbulb moments we immediately published advisories and recommendations, right? We didn't just sit on them while tens of thousands of AT launches proceeded with all the Industry Standard errors, deficiencies, defects in place crashing, injuring, crippling, killing people at the unabated sub-Davis rate, did we?

And I guess we established who WE were and didn't solicit any input, comments, feedback from any weekender muppets, right?
...building on the record of the Flytec Championships held at Quest Air and the previous meets in Big Spring.
And exactly what were these records and what qualified them to model as starting points for this bold push upward into the dizzying safety stratosphere? The fact that you and your pigfucker buddies were running them?
There was an absolute requirement for certain types of bridles, weak links, and secondary releases.
- But for PRIMARY releases use whatever the fuck you want because we've got ABSOLUTE REQUIREMENTS for the weak links and secondary releases.

- Davis thinks that "bridle" and "release" are...

http://ozreport.com/9.032
The Worlds - weaklinks
Davis Straub - 2005/02/07

So if weaklinks don't do much to save us from lockouts, an argument heard repeatedly at the Worlds, then why are we using them after Robin's lockout (and not before)? Shouldn't we have all gone to the Pro-tow or other type of bridle instead, as it was not the weaklink that was at fault in Robin's accident, but the bridle (as your investigation discovered)?
http://ozreport.com/9.009
2005 Worlds
Davis Straub - 2005/01/11

Rohan Holtkamp did an analysis of the accident, in particular the bridle and weaklink, which never broke.
...synonyms. Ditto for "release" and "weak link". So bridle, release, weak link... Pick one. They all mean the same thing.

- There ARE ABSOLUTE REQUIREMENTS for certain types of bridles, weak links, and secondary releases. But we muppets don't get to hear:
-- what they are
-- who pulled them out of their asses
-- anything about the "thinking" behind these ABSOLUTE REQUIREMENTS
The important things are that they're ABSOLUTE and REQUIREMENTS.
There was an absolute requirement for certain types of bridles...
Fuck yeah!

- Long thin ones that Bob Lane says...

http://ozreport.com/9.098
The thin 1500 pound aerotow bridle
Davis Straub - 2005/05/03

Bob Lane said that Quest Air sold over forty of their bridles (and Bob sold fifteen or twenty) during the Nationals. The Quest Air bridles use thicker Spectra and are designed not to whip around and accidentally tie themselves to the carabineer. Bob says his bridles will not do this either.
...won't whip around and accidentally tie themselves to the carabineer. They'll just...

http://www.hanggliding.org/viewtopic.php?t=14230
pro tow set-up
Jim Rooney - 2009/11/02 18:58:13 UTC

Oh it happens.
I have, all the guys I work with have.
(Our average is 1 in 1,000 tows)

Oh yeah... an other fun fact for ya... ya know when it's far more likely to happen? During a lockout. When we're doing lockout training, the odds go from 1 in 1,000 to over 50/50.
...whip around and DELIBERATELY tie themselves to the carabineer half the time in emergency situations.

- All pro toads, right? They're much safer 'cause the carabine(e)r won't slide up...

Image
http://ozreport.com/pub/images/fingerlakesaccident2.jpg
http://ozreport.com/pub/images/fingerlakesaccident3.jpg
Image

http://www.hanggliding.org/viewtopic.php?t=28290
Report about fatal accident at Quest Air Hang Gliding
Davis Straub - 2013/02/12 20:01:14 UTC

There is very little danger of pulling in too far on the pro tow release. And on the 3 point releases the problem is not that the pilot pulls in too far, but rather that the glider is pulled down as the carabineer rises up the V-bridle. The carabineer does this when the cart suddenly stops as in the pictured case.
...and nose you in...

01-001
Image
04-200
Image
07-300
Image
10-307
Image
15-413
Image

...when you get on a crappy cart.
....weak links...
- 130 pound Greenspot - longer track record than anything the sport has seen before or since. Increases the safety of the towing operation so much that...

http://ozreport.com/13.238
Adam Parer on his tuck and tumble
Adam Parer - 2009/11/25

Due to the rough conditions weak links were breaking just about every other tow and the two tugs worked hard to eventually get everyone off the ground successfully.
...it's a fuckin' miracle when you can get all the gliders airborne in time to go on task.

- Hey Davis...

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

You know, after all this discussion I'm now convinced that it is a very good idea to treat the weaklink as a release, that that is exactly what we do when we have a weaklink on one side of a pro tow bridle. That that is exactly what has happened to me in a number of situations and that the whole business about a weaklink only for the glider not breaking isn't really the case nor a good idea for hang gliding.

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.

I'm thinking about doing a bit more testing as there seemed to be some disagreement around here about what the average breaking strength of a loop of Greenspot (or orange) weaklink was.
How are you able to make any determinations about weak links when you're not really sure what they're supposed to be doing and have no fucking clue as to their actual breaking strengths?
...and secondary releases.
For when your meet head approved primary release...

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 2 hands to get the pin out of the barrel.
No stress because I was high.
...doesn't work.
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Tad Eareckson
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Re: Departing the launch cart - Davis Show

Post by Tad Eareckson »

http://ozreport.com/11.167
2007 Worlds - nobody died
Davis Straub - 2007/08/23 14:58:11 UTC

The tug pilots were experienced...
Fuck yeah. I'll bet none of them were guys the meet heads had met in the parking lot a half hour before showtime. I'll bet each and every one of them had towed gliders behind their tugs before. This was obviously a real class act.

So just how much good does it do the guy on the string...

http://ozreport.com/9.008
2005 Worlds
Davis Straub - 2005/01/10

Death in the paddock.

As pilots we take our lives in our hands. On Sunday, Robin Strid, a Norwegian pilot, chose to foot launch in light cross wind conditions in spite of the pleadings from the ground crew on line number two to use a cart. With the wind from the right and being light I wouldn't have chosen to foot launch if I liked the carts well enough to trust them not to caster.

As he took off his left wing was dragging. Bobby Bailey, the best tow pilot in the business, moved to the right into get further into the wind, and Rob got his left wing up and flying as he lined up behind Bobby.

Then Robin shifted off to the left again getting his right, upwind wing, high again. He was seen reaching for his release. I understand that Bobby also released him.

He kept doing a wing over to the left and dove straight into the ground from about 50 feet. He was killed immediately.
...to have an experienced tug pilot? Got any videos of a tug doing something to get a glider outta trouble? Any testimonials from any grateful gliders who've had their asses saved?

The only thing along those lines I've ever heard are people eternally grateful to the tug for...
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. I cleared the buildings, but came very close to the ground at the bottom of the wingover. I leveled out and landed.

Analyzing my incident made me realize that had I released earlier I probably would have hit the ground at high speed at a steep angle. The result may have been similar to that of the pilot in Germany. The normal procedure for a tow pilot, when the hang glider gets too high, is to release in order to avoid the forces from the glider pulling the tug nose-down into a dangerous dive. However Neal kept me on line until I had enough ground clearance, and I believe he saved me from injury by doing so. I gave him a heart-felt thank you.
http://www.chgpa.org/forums/viewtopic.php?f=2&t=3600
Weak link question
Danny Brotto - 2008/11/04 12:49:44 UTC

I came out of the cart rolled and yawed to the right with the upwind wing flying and the downwind wing stalled. It was rather dramatic. If I had released or if the weak link had broken, the downwind wing would have further stalled and I would have cartwheeled into terra firma in an unpleasant fashion. I held on tight gaining airspeed until the downwind wing began flying, got in behind the tug, and continued the flight.

Sunny later told be he was about to give me the rope and I thanked him to no end that he didn't.
...NOT fixing whatever was going on back there by giving them the rope.

And if the tug were actually on the same wavelength as the guy whose ass is on the string on this then...

http://ozreport.com/forum/viewtopic.php?t=24846
Is this a joke ?
Davis Straub - 2011/08/26 14:04:52 UTC

We had six weaklink breaks in a row at Zapata this year. Russell Brown (tug pilot, tug owner, Quest Air owner) said go ahead and double up (four strands of Cortland Greenspot). He knows I used his Zapata weaklink in Big Spring (pilots were asked to tell the tug pilot if they were doing that).
...what knowledge, experience, skills does he have to prevent the 130 pound Greenspot Pilot In Command from overriding the decisions of the two humans involved in the operation?

Tell me something a tug pilot can do to a halfway competent glider - other than fix whatever's going on back there by giving him the rope - that can endanger him?

And in any case...

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.
...we've all signed a waiver stating our unshakeable belief that it's beyond the realm of physics for a crappy tow driver to have the least degree of negative effect on the glider. And that's obviously true. Nowhere in the archives of hang gliding can you find a report indicating that a tug driver ever did anything to a glider that resulted in so much as a slightly bowed downtube.

They're all trained and certified by u$hPa, the FAA, HPAC, BHPA, HGFA to do their jobs safely - and these are obviously phenomenally successful programs. Over three decades of mainstream aerotowing and no glider ever scratched. A bit odd, donchya think, given that a whole shitload of them have crippled and killed themselves? Maybe just spending really disproportionate ratios of their time and energy developing the knowledge and skills necessary to keep the gliders safe. Lotsa weak link and tow mast breakaway protector theory, I bet.
...and well trained.
To what?

- Totally fucking disregard...

http://www.ushpa.org/page/469
HG Tandem Aerotow Operations

...the AT advisory u$hPa was forced to put out in the aftermath of the 2005/09/03 Arlan Birkett / Jeremiah Thompson twofer and fix whatever's going on back there...

http://farm8.staticflickr.com/7509/15659143120_a9aae8f7bd_o.jpg
Image

...by giving us the rope?

- Adjust his takeoffs and climbs to safely tow with...
We had six weaklink breaks in a row at Zapata this year. Russell Brown (tug pilot, tug owner, Quest Air owner) said go ahead and double up (four strands of Cortland Greenspot). He knows I used his Zapata weaklink in Big Spring (pilots were asked to tell the tug pilot if they were doing that).
...low safety margin Tad-O-Links? Is there a signoff somewhere that tuggies can get for Tad-O-Link towing? Is there anything in the excellent book, Towing Aloft, by Dennis Pagen and Bill Bryden or a Dr. Trisa Tilletti Higher Education article?

How come we gliders have the time, training, skill, experience, strength to be doing THIS:

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.
...to save our asses in a low level lockout but the experienced and well trained tuggies never seem to have the time, training, skill, experience, strength to be able to recognize a low level lockout and fix whatever's going on back there by giving us the rope?

Funny no top notch tuggies - like Bobby Fucking-Genius Bailey - have ever written any articles on the fine points of pulling gliders up in terms that we muppets would be capable of grasping, donchya think?
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Tad Eareckson
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Re: Departing the launch cart - Davis Show

Post by Tad Eareckson »

http://ozreport.com/11.167
2007 Worlds - nobody died
Davis Straub - 2007/08/23 14:58:11 UTC

The ground crew leaders were very experienced...
Past masters at leading ground crews.
...and very much in charge.
Fuck yeah! Made sure:
- ABSOLUTE REQUIREMENTS for certain types of bridles, weak links, and secondary releases were STRICTLY enforced
- no safety was left up to the fuckin' INDIVIDUAL PILOTS
- Davis's safety was always built into the system

Bet they could spot inappropriate weak links from twenty yards and send people to the backs of the lines to swap them out for appropriate ones.
Every pilot had to document their aerotowing experience and every pilot was checked out by Drew...
Good ol' Drew.
...to determine if they could safely tow.
...with one hand while making the easy reach to the release with the other. And, of course, properly respond to the inconvenience of a Davis Link increasing the safety of the towing operation.

So how many pilots did Drew determine COULDN'T safely tow and disqualify from the comp? Zero, right? So it was just a bullshit exercise put on for show, right?

So then how come nothing like that was done with John Claytor at the 2014 ECC? The conditions were perfectly safe - as determined by the Safety Committee - when he locked out coming off the cart in a strong crosswind and broke his freakin' neck. It wasn't until right after that that the Safety Committee observed the conditions to be questionable and erred on the side of caution by cancelling the day. So obviously he was just inherently incapable of towing safely. So why wasn't the planning you'd done for two years for safety built on the record of the Flytec Championships held at Quest Air and the previous meets in Big Spring built on and this asshole grounded and disqualified from the competition?
Unlike at the previous women's worlds in 2006 at Quest Air, every pilot displayed sufficient skills to two safely.
- Some of the better pilots displayed sufficient skills to three or even four safely.
- Good thing. 'Cause Drew had just determined they all had sufficient skills to two safely just by questioning them.
Drew Harris and Flavia set up the staging lines after many vigorous discussions of how they should be laid out. These debates allowed for all the concerned parties to state their views.
Some wanted the lines pointed upwind, others downwind. So we compromised and launched everybody crosswind. This is where the appropriate weak links really paid off.
The ground crew was concentrated and never over taxed or spread out through more than two lines.
Good job. An unconcentrated overtaxed ground crew spread out through more than two lines will often let an inappropriate weak link or straight pin barrel release slip through the cracks.
This meant that there was always more than sufficient crew to assure safety.
- Check barrel release pins for proper bending, make sure the pro toad bridles had appropriate weak links on just one end so as to not double the required towline breaking pressure.

- Drew checked out all the pilots to make sure they could safely tow to a reasonably safe level but not so safely that they could safely tow without a fuckin' ground crew with leaders very experienced and very much in charge.

- Wow. You can assure flying safety with sufficient ground crew. If only the US had employed more ground crew last year. Think of all the carnage we could've totally prevented. What a terrible tragedy it was that Zack Marzec didn't have sufficient ground crew at Quest three years ago.
Every pilot was checked and reassured.
"Don't worry. You'll be just fine with this crap equipment we're sending you up on."
So just how safely could these pilots tow if they all needed to be checked and reassured?
Ever pilot was told every time to hold onto the cart (the orange hose handles were the best - see below) until they were flying.
Right. Ever pilot displayed sufficient skills to two safely but needed to be told every time to hold onto the cart until he was flying.
The one accident that happened on the line came when a pilot had taken off his wheels (he was the only pilot flying with wheels)...
Wheels, of course, having little to no value as far as the safety of an aerotow launched hang gliding competition.
...and when he came off the cart slow and too early.
http://c2.staticflickr.com/2/1562/25190537495_d9a39e894f_o.jpg
Image
His English wasn't good so he may not have understood the requests for him to hold on and he was one of the least experienced pilots at the Worlds.
But, nevertheless, had been one of the pilots who'd displayed sufficient skills to two safely. Drew made goddam sure of that.
The staging lines were widely separated separating the tug traffic to avoid collisions. The Big Spring airport is huge and we had plenty of room.

Because we were launching from an asphalt taxi way and not a grass field, it was super important that pilots hold on hard to the carts.
And to nail those foot landings in the event the Davis Link increased the safety of the towing operation.
The cart would start easily (keeping the weaklink from breaking)...
How the fuck does anything that keeps the weak link from breaking make a towing operation SAFER? If you're gonna tow off of asphalt and reduce towline tension you need to dumb the weak links down proportionally. Same way you dumb down aerotow weak links from surface tow weak links. If the tow pressure is less you make the weak links safer.
...and would get going fast quickly, which had a different feel than the grass fields.
Yes. Different than.
Pilots were taught to make sure that they can enough speed to fly out of any trouble if a weaklink broke.
- Pilots were taught to make sure that they COULD enough speed to fly out of any trouble if a weaklink broke.

- Fly OUT of any trouble? How is it possible to be IN any trouble AFTER a weak link breaks?

http://www.wallaby.com/aerotow_primer.php
Aerotow Primer for Experienced Pilots
The Wallaby Ranch Aerotowing Primer for Experienced Pilots - 2016/02/21

A weak link connects the V-pull to the release, providing a safe limit on the tow force. If you fail to maintain the correct tow position (centered, with the wheels of the tug on the horizon), the weak link will break before you can get into too much trouble.
A weak link breaks BEFORE you can get into too much trouble. Sounds like you're 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.

- Hell, and here I've been thinking that pilots needed to have their shit together for when the weak link...

http://groups.yahoo.com/group/skysailingtowing/message/4633
Weaklinks and aerotowing (ONLY)
Steve Kroop - 2005/02/10 04:50:59 UTC

Davis,

Your weak link comments are dead on. I have been reading the weak link discussion in the Oz Report with quiet amusement. Quiet, because weak links seem to be one of those hot button issues that brings out the argumentative nature of HG pilots and also invokes the "not designed here" mentality and I really did not want to get drawn into a debate. Amusement, because I find it odd that there was so much ink devoted to reinventing the wheel. Collectively I would say that there have been well over a 100,000 tows in the various US flight parks using the same strength weak link with tens of thousands of these tows being in competition. Yes I know some of these have been with strong links but only the best of the best aerotow pilots are doing this.
...DIDN'T break.
We did have one minor injury at a landing field that I chose. The field was inappropriate for landing...
What? Did it have a breaking strength slightly higher than that of a single loop of Cortland 130 lb. Greenspot braided Dacron Tolling line and placed at one end of a shoulder bridle?
...(it was part of a small air field) as it contained power lines, fences, and stakes.
- Probably snakes as well.
- And large rocks strewn all over the place. No problem if you've perfected your flare timing.
- Just put on old Frisbee in the middle. Everybody will be fine.
The Google Earth photo was not sharp enough to provide the task committee with a clear picture of what was there. I should have seen that problem.
How 'bout THIS:

http://www.flickr.com/photos/aerotowrelease/8318769461/
Image Image
http://www.flickr.com/photos/aerotowrelease/8318781297/

problem?:

Image

Should anyone have seen it before the 2005 Worlds? Does anybody see it now?
Numerous pilots had difficulty landing there, but one pilot had to have five stitches (he flew the next day).
Hadn't quite perfected his flare timing?
This is the first worlds to use Google Earth to position the goal points as well as give pilots an idea of where they were going and what it would look like when they got there. That was for the most part very successful.
Ignoring the guy who needed the five stitches.
I used a projector hooked up to my computer and I could display the weather, the task (in SeeYou) and the task in Google Earth.
Good job, Davis. You used the finest aerotowing equipment and that's why you didn't kill anybody in a low level lockout this time. And you made sure everybody's backup loops were in top condition and that's why nobody fell to his death from his glider.
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Tad Eareckson
Posts: 9149
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Re: Departing the launch cart - Davis Show

Post by Tad Eareckson »

http://ozreport.com/11.167
2007 Worlds - nobody died
Davis Straub - 2007/08/23 14:58:11 UTC

You can leave safety up to the individual pilots or you can build safety into your system.
Right. If you've built safety into your system that certainly removes any options to leave any safety issues up to any individual pilots. And conversely, of course, if your leaving safety up to the individual pilots the meet heads are precluded from doing anything to build any safety into their system - like, for example, setting minimum tow equipment performance standard, mandating wheels or skids for all gliders, establishing no-go meteorological limits.
There was only two minor accidents...
Yes. There WAS only two minor accidents. Thanks, in no small part, to meet heads who spares no effort to get things rite.
...that resulted in injury to pilots during the 2007 Worlds.
- One minor accident that resulted in minor injury to one pilot and another minor accident that resulted in MAJOR injury to another pilot.
- And thirty of forty minor accidents that just resulted in busted up gliders.
- And three or four MAJOR accidents that resulted in life threatening injuries to pilots.
- Also fucked up two spectators pretty good.
- And a shitload of really ugly lockouts and inconvenience stalls at altitude.

But nobody died. So the 2007 World comp was a stunning success due solely to the outstanding efforts we meet heads had put into building safety into their system - and, of course, due not a whit to leaving any safety issues up to the individual pilots as we meet heads had taken all those options totally off the table.
That is, if we ignore the pool party. Beer, vodka, Red Bull, and water - a dangerous combination.
- Fuck yeah. Leave anything related to safety up to individual pilots and watch what happens - if you have the stomach for it.

- Pro toad bridle, Davis Link, monster thermal...

http://farm9.staticflickr.com/8394/8696380718_787dbc0005_o.png
Image
Image
http://farm4.staticflickr.com/3728/9655895292_f4f808fb0e_o.png
06-03114

What adjective would you use to describe that combination, Davis?

http://4.bp.blogspot.com/-bRrpHNa68iY/UQ6Pv9gRZyI/AAAAAAAAjTg/Hc22bx5122Q/s2048/20943781_BG1.jpg
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Feel free to speculate when preparing your response.
We planned for two years for safety building on the record of the Flytec Championships held at Quest Air...
THIS:

Image
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Quest Air?
...and the previous meets in Big Spring. There was an absolute requirement for certain types of bridles, weak links, and secondary releases. The tug pilots were experienced and well trained. The ground crew leaders were very experienced and very much in charge.
And these were the primary reasons you had such a smashing safety success at the 2007 Worlds.

- The very experienced and very much in charge ground crew leaders and their teams caught hundreds of deadly issues with the comp pilots queuing up for takeoff.

- There were untold scores of low level lockouts what would've been catastrophic had there not been an absolute requirement for certain types of bridles, weak links, and secondary releases and experienced and well trained tug pilots fixing whatever was going on back there by giving the gliders the ropes.

Thanks to our superb built in safety system - highly trained crew, fire extinguishers, watertight compartments, life jackets, lifeboats, flare guns - our transatlantic voyage went off without a hitch.

An ACTUAL safe/competent operation is always BACKED UP with well trained personnel and emergency equipment but NONE of that shit EVER...
Dr. Trisa Tilletti - 2012/06

You and I have flown sailplanes for almost as long as we have flown hang gliders. We own two sailplanes and have two airplanes that we use for towing full-size sailplanes. In all the time that we have flown and towed sailplanes, we have not experienced or even seen a sailplane weak link break.
...comes into play. So if you're claiming that the comp was safe for all of the issues you're highlighting you're obviously lying and/or running dangerous operations - in your case obviously BOTH.

"Sure Dad, I drove the car VERY safely last night. Good thing the horn, tires, antilock brakes, seat belts, airbags, collapsible steering column were all in good shape and functioning properly so that I could be discharged from the hospital a couple hours ago. And the emergency responders really had their shit together - very experienced and very much in charge."
Every pilot had to document their aerotowing experience and every pilot was checked out by Drew to determine if they could safely tow. Unlike at the previous women's worlds in 2006 at Quest Air, every pilot displayed sufficient skills to two safely.
http://c2.staticflickr.com/2/1562/25190537495_d9a39e894f_o.jpg
Image

Obviously. (Anybody ever see another AT launch crash like that before or since?)
Drew Harris and Flavia set up the staging lines after many vigorous discussions of how they should be laid out. These debates allowed for all the concerned parties to state their views.
All the concerned parties save, of course, for the individual pilots. We'd already decided to build safety into our system so it would've obviously been a totally pointless...

http://ozreport.com/forum/viewtopic.php?t=31052
Poll on weaklinks
Jim Rooney - 2013/03/04 19:31:36 UTC

We all play by the same rules, or we don't play.
Morningside decided that they were happy with 200lb weaklink. They changed their tug's link and they don't just pass the stuff out either. If you'd like to know more about it... go ask them.
The law of the land at comps was 130lb greenspot or you don't tow. Seriously. It was announced before the comp that this would be the policy. Some guys went and made their case to the safety committee and were shut down. So yeah, sorry... suck it up.
...waste of time to allow the individual pilots to state their views.
The ground crew was concentrated and never over taxed or spread out through more than two lines. This meant that there was always more than sufficient crew to assure safety.
Are you sure? I myself am wondering if things might have gone better if the ground crew had been undertaxed and never spread out through more than one lines.
Every pilot was checked and reassured.
How much time did they need to spend reassuring Alejandro that he displayed sufficient skills to two safely?
Ever pilot was told every time to hold onto the cart (the orange hose handles were the best - see below) until they were flying. The one accident that happened on the line came when a pilot had taken off his wheels (he was the only pilot flying with wheels)...
So then why are you making a point about the wheels?

http://c2.staticflickr.com/2/1562/25190537495_d9a39e894f_o.jpg
Image

'Cause when he stalled back onto the asphalt his glider which didn't have wheels, stopped a lot faster than his cart, which did?
...and when he came off the cart slow and too early.
Well, things could've turned out a lot worse. I hate to think what might have happened to him without:
- an absolute requirement for certain types of bridles, weak links, and secondary releases
- an experienced and well trained tug pilot
- a very experienced and very much in charge ground crew leader
His English wasn't good...
And wasn't likely to get much better hanging around with a bunch of dickheaded US glider people.
...so he may not have understood the requests for him to hold on...
- And, despite the fact that you were under 170 miles from the Mexican border and amongst the competitors there were six from Spain, five from Mexico, five from Ecuador, two from Columbia, and one other from Guatemala, there was just no way to effectively communicate with this guy.

- And, unfortunately, his vision wasn't very good either. So he wasn't able to watch proper dolly launches and understand what was going on and what he was supposed to be doing.

- But prior to Task 4 he was launching so well that none of the meet heads, experienced and well trained tug pilots, very experienced and very much in charge ground crew leaders felt any need to advise or caution him concerning his launch. Also successfully towed to release altitude in thermal conditions on all previous exercises of the event without so much as a single syllable of criticism from any of the meet heads, experienced and well trained tug pilots, very experienced and very much in charge ground crew leaders. Go figure.
...and he was one of the least experienced pilots at the Worlds.
- But, unlike at the previous women's Worlds in 2006 at Quest Air, had displayed sufficient skills to two safely - but just barely made the cutoff. Fortunately for him, I'd say. Could've had a really nasty crash if he hadn't been able to document his aerotowing experience and been checked out by Drew to determine he could safely tow.

- So you knew what everybody's experience was before anything got off the ground. And there's absolutely nothing wrong with your minimum standards.

- Sure is a good thing you meet heads, experienced and well trained tug pilots, very experienced and very much in charge ground crew leaders had one of one of the least experienced pilots at the Worlds - who may not have understood the requests for him to hold onto the cart and came off slow and too early on a pro tow bridle, isn't it Davis?

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

It was required that pilots be able to be connected to the tow line quickly both in order to be fair to all pilots and get them in the air in time to compete with each other, as well as to promote safety. It is safer to have a simple uniform release/bridle system that the ground crew is familiar with and can determine if there is a problem. The simpler and more uniform the safer, system wide.

Getting pilots into the air quickly is also safer as it reduces the stress that pilots feel on the ground and keeps them focused on their job which is to launch safely and without hassling the ground crew or themselves. When we look at safety we have to look at the whole system, not just one component of that system. One pilot may feel that one component is unsafe from his point of view and desire a different approach, but accommodating one pilot can reduce the overall safety of the system.
Having him on a three pointer - like Steve Exceptionally-Knowledgeable Wendt and everybody else and his dog does for the least experienced pilots. Accommodating him as such might've reduced the overall safety of the system. Rather than that one minor accident you could've had ten or fifteen MAJOR ones. Good call having him take his wheels off too.
The staging lines were widely separated separating the tug traffic to avoid collisions. The Big Spring airport is huge and we had plenty of room.

Because we were launching from an asphalt taxi way and not a grass field, it was super important that pilots hold on hard to the carts.
But not at all important for them to have wheels and kneepads or skiddable harness.
The cart would start easily (keeping the weaklink from breaking)...
Weak links that COULDN'T be kept from breaking...

http://ozreport.com/forum/viewtopic.php?t=24846
Is this a joke ?
Davis Straub - 2011/08/28 15:26:28 UTC

Then again, Russell Brown had us double up behind him after six breaks in a row at Zapata. We couldn't figure out why we had so many breaks so quickly. Maybe just coincidence.
...is light morning conditions at Zapata. Go figure.
...and would get going fast quickly, which had a different feel than the grass fields. Pilots were taught to make sure that they can enough speed to fly out of any trouble if a weaklink broke.
- Oh. Every pilot had displayed sufficient skills to two safely but they all needed to be TAUGHT to make sure to carry enough speed to handle the inconvenience of a weak link generated increase in the safety of the towing operation.

- So why aren't you telling us what the ABSOLUTE REQUIREMENT for a weak link which increases the safety of the towing operation is and how - building on the record of the Flytec Championships held at Quest Air and the previous meets in Big Spring - you determined that ABSOLUTE REQUIREMENT?
We did have one minor injury at a landing field that I chose.
So you've said that there were "only" "two MINOR ACCIDENTS that resulted in injury". And you've stated that one of the accidents resulted in "one" "minor" injury - five stitches and flew the next day. And you've very conspicuously said NOTHING about Alejandro's injuries - other than the fact that...

http://ozreport.com/11.159
2007 Worlds - Day 5, Task 5
Davis Straub - 2007/08/13 15:52:15 UTC

We had a slight accident on launch yesterday when Alejandro Diez from Guatemala came out of the cart too slow and dove into the asphalt. He was injured but will be out of the hospital today.
...he was supposed to have been out of the hospital the next day. And you make no mention of the fact that that crash knocked him out of the rest of the comp. So we can conclude beyond any reasonable shadow of a doubt that you did have one MAJOR injury - quite likely a career ender like John Claytor's - to pilots during the 2007 Worlds.
Minimal damage to the glider.
Great! Something else must've absorbed just about all the impact.

Do you get a bulk rate discount on lipstick?

And think about it, people of varying ages... When you go to an event that actually WAS safe and well run and then come back and write nine paragraphs about how safe and well run it was? Whenever you read an article from a u$hPa Industry pigfucker about how safe and well run his event was you can immediately bet your bottom dollar that it was a travesty and start looking for all the crap the aforementioned pigfucker ISN'T saying.
The field was inappropriate for landing (it was part of a small air field) as it contained power lines, fences, and stakes. The Google Earth photo was not sharp enough to provide the task committee with a clear picture of what was there. I should have seen that problem. Numerous pilots had difficulty landing there, but one pilot had to have five stitches (he flew the next day).
The one HONEST part of the report. I wonder if Davis had to take some pills in order to get it on paper properly.
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Tad Eareckson
Posts: 9149
Joined: 2010/11/25 03:48:55 UTC

Re: Departing the launch cart - Davis Show

Post by Tad Eareckson »

http://ozreport.com/11.159
2007 Worlds - Day 5, Task 5
Davis Straub - 2007/08/13 15:52:15 UTC

We had a slight accident on launch yesterday when Alejandro Diez from Guatemala came out of the cart too slow and dove into the asphalt. He was injured but will be out of the hospital today. Minimal damage to the glider. We tell every pilot just before they launch to hold onto the cart until they are really flying.

http://c2.staticflickr.com/2/1562/25190537495_d9a39e894f_o.jpg
Image

Moore caught the action.
We had a slight accident...
- "We" did? Looks to me like Alejandro did.

- A "SLIGHT" accident. Like the 200 pound weak link Davis uses is...

http://ozreport.com/forum/viewtopic.php?t=30971
Zach Marzec
Davis Straub - 2013/02/13 15:45:22 UTC

IMHO aerotowing is relatively safe compared with foot launching. I would certainly like to make it safer. What we would all like to know is what could we do to make it safer.

We have no agreement that a stronger weaklink would make it safer (again, I fly with a slightly stronger weaklink).
...SLIGHTLY stronger than the 130 pound crap he forces everyone else to fly with.

- Accident?
...on launch yesterday when Alejandro Diez from Guatemala came out of the cart too slow and dove into the asphalt.
- Oh. He came out too slow and then DOVE into the asphalt. He didn't STALL onto the asphalt.

http://ozreport.com/11.167
2007 Worlds - nobody died
Davis Straub - 2007/08/23 14:58:11 UTC

It wasn't an accident

(Big Spring, Texas)

You can leave safety up to the individual pilots or you can build safety into your system. There was only two minor accidents that resulted in injury to pilots during the 2007 Worlds. That is, if we ignore the pool party. Beer, vodka, Red Bull, and water - a dangerous combination.

We planned for two years for safety building on the record of the Flytec Championships held at Quest Air and the previous meets in Big Spring. There was an absolute requirement for certain types of bridles, weak links, and secondary releases. The tug pilots were experienced and well trained. The ground crew leaders were very experienced and very much in charge.
- Name some aerotow parks that pull gliders up from asphalt runways.

- Notice nobody ever says, "We had a slight accident on launch yesterday when Alejandro Diez from Guatemala came out of the cart too slow and dove into the grass."
Because we were launching from an asphalt taxi way and not a grass field, it was super important that pilots hold on hard to the carts. The cart would start easily (keeping the weaklink from breaking) and would get going fast quickly, which had a different feel than the grass fields. Pilots were taught to make sure that they can enough speed to fly out of any trouble if a weaklink broke.
Oh. So you're saying that a grass field is safer. On grass Davis Links increase the safety of the towing operation a lot more often as the carts start rolling and the increase the safety of the towing operation isn't as dangerous after the glider's airborne. And it's less critical to have one's flare timing perfected before an inconvenience.

But, hell, you only seriously trashed one very marginal muppet who was too stupid to be able to understand English (at a World meet) very well.
He was injured but will be out of the hospital today.
And into what? Did he come back to the airport to take care of his gear, thank everybody for the great job they'd done running the comp so far, start prepping for the next day's task?
Minimal damage to the glider.
Great, Davis! How much damage to the pilot? In dollars for both - so's we can get a feel for proportion.
We tell every pilot just before they launch to hold onto the cart until they are really flying.
Shit. That didn't seem to work all that well for Alejandro. Maybe you should try telling them twice. And/Or LOUDER.

Do you tell any pilots that wheels might be advisable in that environment? You seem to think that...
The one accident that happened on the line came when a pilot had taken off his wheels...
...that was a substantial issue on this one and...
...(he was the only pilot flying with wheels) and when he came off the cart slow and too early.
...nobody else was using them and...
...he was one of the least experienced pilots at the Worlds.
...he was just ONE OF the least experienced pilots at the Worlds.
...when he came off the cart slow and too early.
What an asshole.

http://www.youtube.com/watch?v=lZbvzqjcowY

11-1307
http://c2.staticflickr.com/2/1665/25540796840_8d23f4788c_o.png
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So why is it "WE" love wheels? And why is it...

http://www.youtube.com/watch?v=QmlV6gbJIhc

08-1002
http://c2.staticflickr.com/2/1534/25842797375_ea61a8c598_o.png
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...that we consider them to be of zero value for an increase the safety of the towing operation? 'Cause they do pretty much the opposite of what the focal point of a safe towing system does?
- Looks to me like Alejandro caught the action.

- You'll notice that this guy hit so shockingly violently than none of the usual assholes remembered to praise the Davis Link for...

http://ozreport.com/9.033
Why weaklinks?
Davis Straub - 2005/02/08

Well, I can recall a time when having a weaklink was very useful for me, here. If you come off the cart early and hit the ground, you'd like the tow rope to break so that you are not pulled along the ground anymore than necessary.
http://groups.yahoo.com/group/skysailingtowing/message/6726
Weaklinks
Peter Birren - 2008/10/27 23:41:49 UTC

I know about this type of accident because it happened to me, breaking four ribs and my larynx... and I was aerotowing using a dolly. The shit 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.
http://ozreport.com/9.177
Another bad launch off the cart
Davis Straub - 2005/08/28

And another good outcome that we can learn from.

http://www.flickr.com/photos/meaneyman/sets/788578/
Bad launch good recovery

http://www.flickr.com/photos/meaneyman/35642942/
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http://www.flickr.com/photos/meaneyman/35642828/
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http://www.flickr.com/photos/meaneyman/35642837/
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http://www.flickr.com/photos/meaneyman/35642853/
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http://www.flickr.com/photos/meaneyman/35642875/
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http://www.flickr.com/photos/meaneyman/35642889/
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http://www.flickr.com/photos/meaneyman/35642904/
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http://www.flickr.com/photos/meaneyman/35642917/
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http://www.flickr.com/photos/meaneyman/35642816/
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Tim Meaney has published a series of photos which show a poor launch by an Exxtacy pilot at the 2005 Big Spring Open. The Exxtacy's right wing has come up while the pilot is still on the cart. In addition, the right wing has come up so high that the right side of the control frame has also come off the cart and isn't being held horizontal. This means that the spoileron on the right side isn't deployed, or deployed as much as it would be if the pilot had held (or been able to hold) the control frame onto the cart. If the spoileron had been deployed, the right wing would have had a tendency to come back down. In this case, it didn't.

In the second frame the left wing is dragging on the runway and the weaklink has broken. This is a good thing. The pilot is in trouble and you want that weaklink broken so that he isn't dragged down the runway. Notice that he hasn't moved his hands at all, and doesn't throughout this sequence of photos. The weak weaklink does the heavy lifting for him. Use a properly sized weaklink!
Preventing him from being dragged. Nothing about him thinking he could fix a bad thing and not wanting to start over and/or his experienced and well trained tug pilot fixing whatever was going on back there by giving him the rope - either.
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Tad Eareckson
Posts: 9149
Joined: 2010/11/25 03:48:55 UTC

Re: Departing the launch cart - Davis Show

Post by Tad Eareckson »

http://ozreport.com/11.167
2007 Worlds - nobody died
Davis Straub - 2007/08/23 14:58:11 UTC

(Big Spring, Texas)

Every pilot was checked and reassured. Ever pilot was told every time to hold onto the cart (the orange hose handles were the best - see below) until they were flying. The one accident that happened on the line came when a pilot had taken off his wheels (he was the only pilot flying with wheels) and when he came off the cart slow and too early. His English wasn't good so he may not have understood the requests for him to hold on and he was one of the least experienced pilots at the Worlds.

Because we were launching from an asphalt taxi way and not a grass field, it was super important that pilots hold on hard to the carts. The cart would start easily (keeping the weaklink from breaking) and would get going fast quickly, which had a different feel than the grass fields. Pilots were taught to make sure that they can enough speed to fly out of any trouble if a weaklink broke.
http://ozreport.com/11.167
Orange air hose handles are the best
Davis Straub - 2007/08/23 13:58:37 UTC

Once again these handles prove to be the best solution (Big Spring, Texas)

http://ozreport.com/9.074
It was Ricky Duncan

Most of the carts at the Worlds were these carts from Quest Air with the orange air hose handles. Time and time again they proved superior to the rope beneath the control bar. I repeatedly saw pilots grabbing hold of the orange handles and pulling them over the top of their control bar and holding on tight.

Let's improve our carts and upgrade them.
http://ozreport.com/11.159
2007 Worlds - Day 5, Task 5
Davis Straub - 2007/08/13 15:52:15 UTC

We had a slight accident on launch yesterday when Alejandro Diez from Guatemala came out of the cart too slow and dove into the asphalt. He was injured but will be out of the hospital today. Minimal damage to the glider. We tell every pilot just before they launch to hold onto the cart until they are really flying.

http://c2.staticflickr.com/2/1562/25190537495_d9a39e894f_o.jpg
Image
http://ozreport.com/9.177
Another bad launch off the cart
Davis Straub - 2005/08/28

And another good outcome that we can learn from.

http://www.flickr.com/photos/meaneyman/sets/788578/
Bad launch good recovery

http://www.flickr.com/photos/meaneyman/35642942/
Image
http://www.flickr.com/photos/meaneyman/35642828/
Image
User avatar
Tad Eareckson
Posts: 9149
Joined: 2010/11/25 03:48:55 UTC

Re: Departing the launch cart - Davis Show

Post by Tad Eareckson »

http://ozreport.com/9.177
Another bad launch off the cart
Davis Straub - 2005/08/28

And another good outcome that we can learn from.

http://www.flickr.com/photos/meaneyman/sets/788578/
Bad launch good recovery
Hey Davis...

http://www.flickr.com/photos/meaneyman/35642875/
Image

Think this asshole benefitted the slightest degree by having wheels on his basetube for this Big Spring asphalt runway launch?
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