Weak links

[Tad Eareckson]

http://www.youtube.com/watch?v=qAnmB8pjGA0

sanderdelta - 2011/01/11
Sander van Schaik

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Another stills project - long overdue - of a real world treasure of a hang gliding video.

We first met Sander courtesy of:

http://www.kitestrings.org/post3337.html#p3337
deltaman - 2012/11/29 08:57:32 UTC

http://www.youtube.com/watch?v=il3YPp3Rfq8

Stills collection:
http://www.kitestrings.org/post11609.html#p11609

Posted 2012/11/22 - near 22 months subsequent to this one. This one we owe to:

http://ozreport.com/forum/viewtopic.php?t=31052
Poll on weaklinks
Freedomspyder - 2013/03/09 15:23:42 UTC
http://www.kitestrings.org/post4005.html#p4005

Same Woody Valley harness in both but flying so flawlessly in the latter it's hard to believe it's the same individual.

Safety of the Forbes towing operation arbitrarily increased:
- at every bit of twelve hundred feet
- with threat potential to the planes nonexistent
- over the intentions of the drivers on both ends of the string to continue

Costs:
- wasted:
-- World comp day for this guy who's just come halfway around the planet for this event and experience
-- efforts of:
--- tug and glider pilots
--- three ground crewman
--- launch cart recovery vehicle and driver
-- tug:
--- driver
--- launch and climb
--- gas
--- engine and airframe wear and tear
-- primo soaring time of everyone behind in line and supporting same
- glider recovery:
-- vehicle
-- two person crew

- And we'll count the downtube as well. Initially I was disinclined to 'cause the landing wasn't related to the (failed) tow and could've happened exactly the same after the conclusion of a 150 mile triangle. But he wasn't getting any better at staying in position in the course of this tow so it's not a good bet that the finish of the flight had anything of value in the education department.

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Forbes Airport - 33°21'21.24" S 147°55'36.83" E - 8787 feet - 2018/10/14

I've included coordinates for nine geographical features visible in the following frames to help one navigate his way through this flight.

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-001 - chronological order
- -0 - minutes
- 00 - seconds
- 00 - frame (25 fps)

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33°21'52.37" S 147°55'49.62" E

Task 4 at the Worlds in Forbes, its a windy day
- The broken upright day -

Yeah. Substantial breeze. Should make launching and landing nonevents. Neither will be the case however.

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We can read "Laminar" (Icaro) off the starboard wing.

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Charly Insider helmet, very likely some cheap bent pin barrel crap from Davis as his pro toad release.

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Note (keel) camera mount.

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Sander's gonna stay locked in this stiff-arm mode until well after he mushes up well clear of the cart.

Proper procedure is to pull in a bit as soon as the cart starts rolling - or, with this much headwind, well before and HOLD IT. And REALLY hold it if you're an idiot pro toad. The glider will quickly trim, the keel will lift out of the support, you let the speed build, nudge the nose up a wee bit and rise up out of the control bar cradles, then if everything's fine (which it always is) you allow the hold-downs to slip through your grips, lose the cart, stay low waiting for the tug to get airborne and rotate.

Sander's keel NEVER lifts clear. The glider rolls to starboard, all the weight is on the starboard wheel, the port wheel starts castering violently. Sander stays nose high and levers the glider up off the keel support to put that phase of the tow behind him.

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Keel's still in contact with the cradle.

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http://ozreport.com/forum/viewtopic.php?t=27494
The exciting bits

Jim Rooney - 2012/05/28 11:49:58 UTC

Think about it... you're going a million miles an hour under huge (relatively speaking) line tension as you come blazing out of the cart struggling to "stay down"... as you slam into turbulent air. Hell yes you're going to break weaklinks. That's what they're there for!
You're subjecting them to massive loadings.
(The shock loading a weaklink sees as you hit the propwash is far greater than people appreciate)
That's why we have them... they're doing their job.

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Note windsock.

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Hey Dragonfly dudes... If you're towing these guys on Standard Davis Links none of y'all are really all that competent. Ditto for nearly all the of the other organizers, participants, supporters of this event.

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33°21'04.73" S 147°56'16.18" E

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Glider's rolled to starboard, bar's out, Sander's doing NOTHING but maintaining forward pressure on the bar, port wheel is castering all over the place, starboard wheel is loaded, down, tracking properly.

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Shock distortion of the image - just like we always see for landing bonks and crashes. Somebody find me another frame like this from an AT launch video.

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Comes off a fair bit sideways - big surprise.

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Lotsa VG cord bunched up and stowed at the starboard control frame corner.

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And NOW we're getting the bar back to something reasonable.

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Note that when we're launching nose high we're not making things any easier for the tug either.

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Note same windsock. Substantial headwind - and since they can launch in any direction they please it's a straight in headwind. A foot landing should be a no-brainer in these conditions, right?

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Dragonfly shadow far right center.

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33°21'12.66" S 147°55'53.76" E

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33°21'42.69" S 147°55'17.15" E

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33°20'59.12" S 147°54'58.19" E

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Either the tug driver is totally clueless or he's being lifted by a thermal. I'm going with the latter. One doesn't need an IQ very high up in the double digit range to know how to fly a tow. And I strongly suspect this guy has tons of these under his belt.

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We're only talking several seconds here but those of us who have some clue of what we're doing are wanting to scream at Sander to "GET THE FUCK OVER AND BRING THE GODDAM WING BACK DOWN!"

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But he doesn't.

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33°22'41.65" S 147°54'13.84" E

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Pop.

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And then instead of turning INTO the lift he just lets it keep pushing him around back towards base.

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The weaklink broke

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Thank God. One can only imagine the horrors which would've likely befallen the pilots of both planes if it hadn't.

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33°21'05.91" S 147°55'24.33" E

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33°21'04.73" S 147°56'16.18" E

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For many viewings of this one I'd been thinking that Sander was pulling on VG.

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But VG cords, pulleys, cleats are on the STARBOARD side of the control frame.

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His Standard Aerotow Weak Link was on the starboard end of his cheap shit pro toad bridle and the bridle has snagged at the port control frame angle.

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But only girls and fags fly two point.

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VG cord now trailing.

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The landing at the paddock of Forbes Airfield

33°21'22.38" S 147°56'12.11" E

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And DO make sure to plan and execute your approach and landing such that you won't crowd anyone in the launch and staging areas.

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Title shot.

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Note how much brighter it displays for the YouTube page or embedded display (up at the top of this post). When I first started noticing I thought it had been pulled off of a different video or unincluded footage from this one.

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Wow, we ARE capable of inputting enough left to get it to turn the other way.

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Sander turning onto final:

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Andrea Ghidini turning onto final:

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Yeah, that should do it with respect to safe clearance from the launch and staging areas.

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Hope you're carrying enough water to make it back safely if the retrieval guys drop the ball.

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Might as well get SOMETHING in by way of XC for this flight.

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Getting that all important landing gear out and ready to handle whatever's called for.

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The usual wire snag.

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No speed, no control.

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Jolt distortion.

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Looks like you'll be walking away from this one totally unscathed. Back to launch, a new loop of 130 pound Greenspot from the Meet Heads, do the same thing over again, get much better results.

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Oops.

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Grr *%@(*Y%$##$% !!

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http://ozreport.com/forum/viewtopic.php?t=24846
Is this a joke ?

Jim Rooney - 2011/08/26 17:34:33 UTC

Remember, a weak link improves safety.
Say it over and over and over in your head until it sinks in.
And take that straw man argument and burn it please.

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Our best look at the carabiner. Gate aft. Don't worry about it. You'll never be needing your parachute anyway - as long a you keep sticking with HGFA SOPs anyway.

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in replay

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No, I took great pains to keep everything in proper chronological order.

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You're probably far enough off in the Australian outback to be able to get away with this blatant violation of their most sacred tradition.

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http://groups.yahoo.com/group/skysailingtowing/message/7230
Towing question

Martin Henry - 2009/06/26 06:06:59 UTC

PS... you got to be careful mentioning weak link strengths around the forum, it can spark a civil war

So where were you?

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---
2022/06/09 22:30:00 UTC

http://www.youtube.com/watch?v=cL5r1bSFRzA

Artur Dzamikhov - 2013/02/22

Short cut about World Championship 2013 in Forbes. The main movie coming soon... may be...

Uploaded twenty days after the Zack Marzec Standard Aerotow Weak Link inconvenience fatality, previously posted:
http://www.kitestrings.org/post4316.html#p4316
2013/05/03 15:02:04 UTC

Great video, nice amendment to the Sander. Helps to see a good bit more of what's going on at these world events.