Weak links

General discussion about the sport of hang gliding
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Tad Eareckson
Posts: 9161
Joined: 2010/11/25 03:48:55 UTC

Re: Weak links

Post by Tad Eareckson »

http://ozreport.com/9.022
Worlds organization critique - a response
Davis Straub - 2005/01/25

The Worlds should have been an aerotow meet only. There were very few car towers, but because of them the meet organization was dramatically affected for the worse. One of the meet organizers was car towing.
Lessee... How many:
- car towing:
-- weak link failures did you have?
-- towlines did you lose?
-- release failures did you have?
-- lockouts did you have?
- fatal car towing lockouts did you have?
- competition days were scrubbed as a consequence of car towing fatalities?
I don't feel that the Worlds were that badly organized...
Nah. Hard to imagine the competition going off any more smoothly than this one did.
...but then I have a lot of experience in Australia, so I have some idea of what to expect and have a reasonable level of expectations.
Expectations of weak links which break as early as possible in lockout situations but are strong and reliable enough to avoid frequent breaks from turbulence, gliders and towlines raining out of the sky because a weak link which breaks as early as possible in lockout situations but is strong and reliable enough to avoid frequent breaks from turbulence exists only in the fevered imaginations of total idiots, dangerously unstable launch dollies, people slamming into runways 'cause their Industry Standard releases stink on ice and don't work even when/if you can get to them...

If first you don't succeed flush the standards down the toilet.
There are undoubtedly different expectations created by cultural differences.
Don't worry, Davis. The shittier competence levels, procedures, and equipment the more people will accept straight and level weak link failures, inaccessible and locked up releases, crashes, injuries, and fatalities as routine at all aerotowing operations on all sides of all borders.
Putting on a Worlds is a lot different than putting on a Nationals. Meet organizers have to be sensitive to those differences and not just rely on their own instincts for what has worked well in the past. They need to listen carefully to CIVL officials and other team leaders.
Why?

http://ozreport.com/9.031
Worlds - Rohan speaks
Rohan Holtkamp - 2005/02/06

The tug pilots wanted 80 kilogram weaklinks on the pilot end and that is EXACTLY what they got.
We've got tug drivers to dictate to everybody how things are gonna be run. That's what we pay them for, isn't it?
They need to be very flexible and make changes quickly.
Yeah.
Dr. Trisa Tilletti - 2012/06

Based on several decades of experience and hundreds of thousands of tows conducted by numerous aerotow operators across the county, the de facto standard has become use of a 260 lb. weak link made as a loop of 130 lb. green spot IGFA Dacron braided fishing line attached to one end of the pilot's V-bridle.
Right after several more decades of experience and several more hundreds of thousands of tows conducted by numerous aerotow operators across the county.

http://ozreport.com/9.031
Worlds - Rohan speaks
Davis Straub - 2005/02/06

Rohan defends his organization against my defense of his organization.

Rohan Holtkamp (comments below in blue) at Dynamic Flight responds to my defense of the Worlds organization from a critique by Angelo.
Weaklinks are normally seen as a pilot responsibility (although sometimes the meet organizers have taken over that function - search the Oz Report for "joke weaklinks").
The tug pilots wanted 80 kilogram weaklinks on the pilot end and that is EXACTLY what they got.
- 80 kilograms. 176 pounds. For yours truly 0.55 Gs. Fifty pounds over normal steady state 914 Dragonfly tow tension. A quarter G under the FAA minimum, a third what I want, a quarter of what I'm allowed to have.

- Fuck you, Rohan.

-- WE pay for those goddam Dragonflies and they exist ONLY to serve US. It's not the other way around.

-- If you'd have been worth shit as an organizer you'd have told Bill Moyes, Bobby Bender Bailey, and any other of those arrogant morons to either show up prepared to pull five hundred pounds or to go fuck themselves.

-- WHEN they refused you shoulda announced that you were scrubbing the meet if possible or resigning if not 'cause you had no competent drivers available to get the gliders safely off the ground.

-- Then you shoulda made as much stink as possible with the goddam national hang gliding organizations, CIVL, and the FAI.

- What put Robin out of control to begin with was a foot launch in which he left the ground dragging a tip.

-- Even with the crap carts available NOBODY else foot launched and NOBODY else had a dangerous low level control issue (not precipitated by a Local Rules precision weak link failure) anywhere close to takeoff.

-- A two G weak link has NEVER presented a threat to ANY tug equipped with a release which comes anywhere close to compliance with USHGA regulations.

-- An out of control glider has NEVER presented a threat to ANY tug equipped with a release which comes anywhere close to compliance with USHGA regulations either - but has the potential to pull the tug's tail around a bit.

-- How many of the shitheads comprising the tug fleet refused to tow foot launchers?
But, weaklinks really are a collective issue, because they affect the safety of tug pilots and other competitors. As Robin's death showed, one pilot's mistakes can affect everyone.
The white material broke at 95 kg untwisted. 135 kg twisted. That's what the pilots ended up towing with!
- Twisted, near ninety pounds under what they allow for tandem.

- Still crap. Every single aerotow launch of that meet subjected the glider to a high risk of crashing because of the "safety" measures the Bailey-Moyes assholes were shoving down everyone's throats.
Test this yourself, you should have a few in your harness still.
Why?
Dr. Trisa Tilletti - 2012/06
USHGA Towing Committee Chairman

We could get into details of lab testing weak links and bridles, but this article is already getting long. That would be a good topic for an article in the future. Besides, with our backgrounds in formal research, you and I both know that lab tests may produce results with good internal validity, but are often weak in regard to external validity--meaning lab conditions cannot completely include all the factors and variability that exists in the big, real world.
It's totally impossible to derive any useful information whatsoever from bench testing. The proper procedure is to just declare a weak link to be any rating you want it to be and tell people that it's optimized to break as early as possible in lockout situations, but be strong and reliable enough to avoid frequent breaks from turbulence.
We are missing nearly four hundred assemblies, so on average each aerotower should have three to four.
Ya know what sailplanes do, douchebag? They get Tost weak link assemblies for both ends of the towline and leave them there forever.
First, the rules should allow pilots who break weaklink under five hundred feet to come back and launch again at the front of the line. This may seem unfair, but we need this to discourage pilots from eliminating weaklinks.
Yes I agree. We just copied the refly rules I experienced in Florida.
Fuck you and fuck Florida.
Second, for the good of the meets, the meet organization should include their weaklink (adjusted for pilot and glider weight) in the tow line at the pilot end.
This was provided from the first practice day, I personally helped prepare the weaklinks for 115 to 123 kg all up weight from this time.
My all up weight is 145 kilograms - asshole.
They did this here after Robin's death, by putting a weaklink between two rings, hooking one ring to the pilot's tow bridle and the other to the tow rope. The pilot can have any weaklink that they want, but the meet organizers have their weaklinks also, on both ends of the tow line.
Robin chose to refuse ours before the tow.
What's your goddam point?

I one hundred percent guarantee you that if he used your fucking weak link but refused to fly with a hook knife there'd have been volumes written about what an asshole he was for not flying with a hook knife and how critically important it is to have one every time you tow.
The Worlds should have been an aerotow meet only. There were very few car towers, but because of them the meet organization was dramatically affected for the worse. One of the meet organizers was car towing.
Organising is done before the meet commences. My 'organising hat' was taken off as soon as the meet commenced.
Of course it was. Once an organizer has seen to it that he's got tug drivers all united on the issue of eighty kilogram lockout preventers and tug protectors and all the gliders equipped with Industry Standard releases and dollies his job is done.

It matters not a whit that the dollies are all unstable, gliders and towlines are raining out of the sky 'cause the weak links are inadequate on the back end and even more inadequate on the front end, the lockout preventers do absolutely nothing to prevent lockouts, and the Industry Standard releases had lethal accessibility, capacity, and functionality issues.

Once you've organized the perfect meet and the first glider hooks up for Task One that 'organising hat' comes off.
Some countries/pilots could not afford the aerotowing, me included.
How much did three days of competition round aerotowing cost Robin?

What was the overall lost airtime cost to the competitors - many of whom had traveled with their gliders from halfway around the planet - of the two competition days being scrubbed as a consequence of Robin's three days of competition round aerotowing?

What strength weak link did your truck driver permit you to use?
I don't feel that the Worlds were that badly organized, but then I have a lot of experience in Australia, so I have some idea of what to expect and have a reasonable level of expectations. There are undoubtedly different expectations created by cultural differences.
Thank you. True.
Yeah, it's always a good idea to throw a fatal lockout on launch into the model upon which you're basing your expectations.
Putting on a Worlds is a lot different than putting on a Nationals. Meet organizers have to be sensitive to those differences and not just rely on their own instincts for what has worked well in the past. They need to listen carefully to CIVL officials and other team leaders. They need to be very flexible and make changes quickly.
Every detail that ended up becoming a problem was already forseen.
So you knew you were gonna kill somebody during the planning stages but figured that everyone else was gonna have enough fun to put the overall picture into the black.
Concise job descriptions were written by the organisers (Sandra and I) to prevent the same old pitfalls seen time and again over the last sixteen years of 'comping'.
Fishing line tier, wreckage clearer, family notifier, accident investigator, coverup designer...
The comp director would have had a far easier time if he had read the detail a little more carefully and did not ad-lib so much.
You found a functionally literate comp director? How? Who was it?
(editor's note: I'll not leave my response until the next issue in this case, as this could go on forever (and there is more in the next issue).
Goddam right it's gonna go on forever. You're gonna leave in place...

http://ozreport.com/9.009
2005 Worlds
Davis Straub - 2005/01/11

The weaklink was caught on the release mechanism, a standard spinnaker release found on bridle systems used at Lookout Mountain, Moyes, Wallaby Ranch, and Quest Air.

This type of release mechanism has been banned (at least for a short while) from the Worlds at Hay.
...the STANDARD spinnaker release found on bridle systems used at Lookout Mountain, Moyes, Wallaby Ranch, and Quest Air which finished Robin; continue...

http://ozreport.com/forum/viewtopic.php?t=24534
It's a wrap
Davis Straub - 2011/07/30 19:51:54 UTC

I'm very happy with the way Quest Air (Bobby Bailey designed) does it now.
...endorsing it; sabotaging and locking down any discussions...

http://ozreport.com/forum/viewtopic.php?t=27494
The exciting bits
Steve Davy - 2012/04/27 01:55:17 UTC

Why did you delete my post?
Davis Straub - 2012/04/27 02:42:02 UTC

Tad's name.
...about equipment that actually works; and promoting...

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

Here is the requirement from the 2007 Worlds local rules (which I wrote) for weaklinks:
Pilots must use weaklinks provided by the meet organizers and in a manner approved by the meet organizers. All weaklinks will be checked and use of inappropriate weaklinks will require the pilot to go to the end of the launch line to change the weaklink.

Weaklinks will consist of a single loop of Cortland 130 lb Greenspot braided Dacron Tolling line and should be placed at one end of a shoulder bridle.
...the standard aerotow weak link as a lockout preventer and primary release mechanism.
Since I was writing a defense of the Worlds organization against the attack from Angelo, I find it interesting that I'm being attacked by the side that I am defending.
As long as you're being attacked by someone... What the hell.
None the less,
That's supposed to be one word.
1. There were problems with the radio pilot briefings...
Pilot briefings like:
The tug pilots wanted 80 kilogram weaklinks on the pilot end and that is EXACTLY what they got.
2. The physical goal must be much closer to the GPS goal than 1.74 kilometers...

3. I specifically observed that there were no wind socks at the ends of the goal line on the last day (the only day that I officially made goal).
Did you have any ribbons at launch to avoid another Eric Aasletten / Mike Nooy rerun? Just kidding.
4. At the Bogong Cup there were virtual goals and free drinks at goal.

5. Rohan seems to have misinterpreted my comment about gag weaklinks. This refers to a problem that Quest Air had the first year they ran their meet and refers in general to the problems that could arise (theoretically) when a meet organizer takes over this responsibility and the responsibility for weaklinks is now on his/her shoulders.
Maybe you should follow the fucking FAA regulations for weak links and otherwise leave the fucking responsibility for the fucking weak links to the fucking pilots fucking using them.
6. I didn't take any weaklinks from the Worlds. I certainly never had any to take. No pilot that I am aware of took any. Any insinuation that we (the pilots I know) stole any weaklinks deserves a formal apology.
Stealing weak links from an aerotow operation is a lot like stealing Lyme Disease infected Deer Ticks from Shenandoah National Park.
7. Later, when the meet organizers provided weaklinks that were actually attached to the tow line by the tow marshals then it didn't matter what the pilot's wanted.
Got that right, motherfucker.
If they wanted to be hooked to the tow line, they had to hook to the weaklink on the tow line.
What difference does it make? There's always a weak link on the Dragonfly that's gonna keep them down to dangerously low maximums anyway.
8. Tow line marshals were very reluctant to provide weaklinks (until the big change after Robin's death) insisting that pilots were responsible for their own weaklinks and they could only have one of the precious meet supplied weaklinks if they absolutely needed it just before they launched.
Big fuckin' deal. Someone who shows up at a flight line unprepared to fly needs to learn that he needs to be prepared to fly when he shows up at a flight line.
Other than that, it looks like Rohan and I agree.)
Yeah. That's why I have some major problems with Rohan.
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Tad Eareckson
Posts: 9161
Joined: 2010/11/25 03:48:55 UTC

Re: Weak links

Post by Tad Eareckson »

http://ozreport.com/9.019
Dodgy launch at the Worlds
Davis Straub - 2005/01/23

Here's what a pilot taking his second aerotow ever at the Worlds in Hay looks like.
http://ozreport.com/redirect.php?file=prang
The pilot almost hits Jim Zeiset riding his recumbent bicycle and then hits the cart. Of course he didn't tell the Worlds organizers that he had no experience aerotowing.
Did the Worlds organizers ask him if he had any experience aerotowing?

http://ozreport.com/9.023
The Worlds - aerotowing
Davis Straub - 2005/01/26

Is Safety Job One?
Fuck no, Davis. Task calling is Job One. For any competition that any of you assholes put on, safety isn't even on the list. With all the idiots that you have on the front ends of the lines and all the shit equipment you allow and require on the back ends it would be totally absurd to even attempt to bring up the issue.
As those of you who looked at this video:
http://ozreport.com/redirect.php?file=prang
know there can be some bad consequences for coming to an aerotow competition without aerotowing experience.
Wasn't he using a Local Rules precision weak link which, if he failed to maintain the correct tow position (centered, with the wheels of the tug on the horizon), would break before he could get into too much trouble?
A review of the local rules does not indicate that aerotow experience was a requirement for aerotowing at the Worlds.

A number of pilots had little or no aerotow experience and still they felt it was okay to jeopardize themselves, the pilots and others in their area, and the meet in general by coming to the Worlds and trying to figure out how to aerotow in harsh conditions.
The assumption being that the organizers, directors, tug drivers, and highly experienced aerotowers...

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.
http://ozreport.com/16.078
The Rob Kells Meet
Davis Straub - 2012/04/18 15:02:09 UTC

Mitch Shipley (T2C 144) crashed at launch after a weak link break. He tried to stretch out the downwind leg and then drug a tip turning it around and took out his keel (at least).
http://ozreport.com/9.011
2005 Worlds
Davis Straub - 2005/01/13

Dean Funk didn't get out of the start circle. Tom Lanning had four launches, and two broken weaklinks and a broken base tube. He made it just outside the start circle.
...had fuckin' clues how to aerotow in harsh conditions.

Hell Davis... You're too fuckin' stupid to be able to figure out how to aerotow...

http://www.youtube.com/watch?v=TaVg_bzK3Aw


...in no conditions whatsoever.
Clearly it should have been in the local rules that an appropriate level of aerotowing or car towing experience (whichever was going to be used) was a requirement.
Who got killed worse - the guy with no aerotowing experience or the hotshot from Norway with the standard spinnaker release found on bridle systems used at Lookout Mountain, Moyes, Wallaby Ranch, and Quest Air?

How much worse did this guy do coming off the cart than Steve Elliott at the Forbes Flatlands on 2009/01/03?
It is ironic that CIVL was concerned about the rule that required that pilots at Category I meets have finished in the top two thirds of a Category I or II meet previously. This standard is used to help judge whether pilots are competent and safe to fly in the Worlds. There was no similar standard set in the local rules for having any qualifications to aerotow.
Exactly the same standard set in the local rules for qualifications for the carts and release equipment you're using to aerotow.

And how many people got killed 'cause they had absolutely no qualifications whatsoever to aerotow and how many highly experienced aerotowers were killed because the aerotow equipment they were using had huge track records but no qualifications whatsoever to aerotow?

And what aerotow equipment standards will the organizers be implementing for next year's Worlds to preclude a Robin rerun? I mean besides 130 pound Greenspot?

Asshole.
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Tad Eareckson
Posts: 9161
Joined: 2010/11/25 03:48:55 UTC

Re: Weak links

Post by Tad Eareckson »

http://ozreport.com/9.022
Worlds - CIVL Authority
Davis Straub - 2005/01/25

Can the CIVL Jury Foreman actually cancel a day? Can the meet director under these conditions?

Here is what the CIVL Sporting Code states:
2.8.4 - Authority of Stewards

The steward cannot override the decisions of the championship director, but the steward should point out to the championship director that his/her actions may fail under a protest.

2.8.5 - Authority to Stop Event

The steward must report to the jury president if rules are not being applied. The Jury President can temporarily stop the event according to the rules of the General Section.
John Aldridge has written to me that he stopped the day when Robin died (see more below).
2.20.7 - Suspension, cancellation or stopping a task

2.20.7.1 - Suspension

The Competition director may suspend the launch if conditions become unsuitable, for safety reasons. If launching is suspended only for a short period, the Director need not cancel the task.

2.20.7.2 - Cancellation

The Competition Director may cancel a task before any competitor has taken off if the weather becomes unsuitable or for safety reasons.

2.20.7.3 - Stopping

The Director has the power to stop a task after some or all pilots have taken off only in an emergency resulting from hazardous weather or other conditions which could not be avoided by the pilots, and which would endanger their safety.
It would appear to me that neither the Jury Foreman nor the Meet Director had the authority to cancel the task nor cancel the next day after Robin was killed near launch.

I asked Flip Koetsier, who along with Jim Zeiset was a meet steward, whether meet stewards have the power to stop a task from proceeding. He responded:
To answer your question: No, the CIVL stewards do not have the power to stop a task. They can only advise (strongly advise) the competition director. That is what I did during the last task, when there was no ambulance or emergency medical technician during launching.
(editor's note: Launching was suspended for five minutes until the ambulance showed up.)

John Aldridge replies to my questions (see above):
I cut short my Oz trip and returned to the UK at the weekend. Hopefully I will find a doctor in the UK who can diagnose the stuff the Hay doctor was unable to deal with!

Anyway, as I responded to your previous mail confirming that I had stopped the task and this has generated more questions - so I had better clarify what went on (from my perspective) on the day of Robin's death.

I was in bad shape at the time and (for the second day) I had gone to bed after the team leader meeting. I was woken by a call from one of the stewards telling me we had a fatality in the paddock and asking if the task should be stopped. I understand approximately four further launches had been made at that stage from other lanes. I gave immediate instructions to stop the task. With a pilot dead in the paddock and half the field still to launch I did not feel a need to consult the rule book before giving this instruction.

Having no transport I then walked to the HQ to get more information but found no HQ staff there (they were presumably dealing with other urgent matters), but I did find someone who wanted to go out to the paddock so I got him to take me there. By chance he was a visiting Norwegian from Robin's home area.

By the time I arrived in the paddock some pilots were driving away and others de-rigging; the task had been cancelled. Robin and his glider were still in the paddock.

I presume the Meet Director took things further and actually cancelled the day - or possibly that was how he interpreted my instruction when it was relayed to him. Either way I have no problem with it. You have quoted a number of Sporting Code rules about stopping or suspending tasks and say that you do not believe the meet director had the power to cancel the day under those rules. You have acknowledged that I had power to "temporarily stop the event" and asked what that means.

From my perspective then or now there was no way the task could continue in those circumstances. As I have pointed out, a pilot was lying dead in the paddock; his glider was lying there awaiting inspection by the accident investigators, various officials and emergency staff were in that area as well as various vehicles. To continue with the launch in those circumstances was physically possible but not an option - and I have no idea if local police or emergency procedures would have permitted it. I think I am correct in saying that at this stage only around half of the field had launched and the first start gate was not yet open. There is another rule in Sporting Code which states that for a task to be valid all competitors shall have been given the opportunity of having at least one competition flight in time to carry out the task. I do not believe this criteria had been met.

Flavio and Angelo thanked me for stopping the task, the Norwegian team were happy with that decision, another team leader congratulated me the following day for taking the decision promptly. I do not claim any credit, as I think anyone else in my position would have done the same, but I relate these comments as I imagine they reflect the views of the majority of the pilots who were still on the ground at that time - and others who were in the air. I don't personally feel there is anything to be gained from publicly examining the mechanisms by which the task was cancelled that day. You may feel differently - but perhaps you have just had your appetite for examining rules whetted by attending the short jury seminar. :-)
Can the CIVL Jury Foreman actually cancel a day?
Hard to say. CIVL Sporting Code makes no reference to a Jury Foreman - just a Jury PRESIDENT.
It would appear to me that neither the Jury Foreman nor the Meet Director had the authority to cancel the task nor cancel the next day after Robin was killed near launch.
Bullshit.

http://ozreport.com/5.126
Flytec Dragonfly
USAFlytec - 2001/07/14

The tail section of the Dragonfly is designed so that it can accept in-line as well as lateral loads. Furthermore the mast extension, which is part of the tow system, is designed to break away in the event of excessive in-line or lateral loads. The force required to cause a breakaway is roughly equivalent to the force required to break the double weaklink used on the tail bridle.
You're using a tug "designed" by an idiot such that it's inherently incapable of sustaining safe tow tensions.

http://ozreport.com/9.022
Worlds organization critique - a response
Davis Straub - 2005/01/25

Bill Moyes lost eleven spectra ropes the first two days of the Worlds because the pilots' weaklinks were a lot stronger than the ones at the tug end.
You have driving tugs total fucking morons too stupid to be able to hold on to their towlines all the way up to release altitude on normal tows and too sociopathic to give rats' asses about what can happen to the gliders who get them or...

http://ozreport.com/9.030
The Worlds - Rohan replies to Angelo
Rohan Holtkamp - 2005/02/04

I believe he hit an aerotow line dropped from above.
...the trikes they fall on.
Towing Aloft - 1998/01

I witnessed a tug pilot descend low over trees. His towline hit the trees and caught. His weak link broke but the bridle whipped around the towline and held it fast. The pilot was saved by the fact that the towline broke!
You have driving tugs total fucking morons too stupid to be able to configure their weak links to be able to dump a towline when they need to.

http://www.chgpa.org/forums/viewtopic.php?f=2&t=939
Weak link breaks?
Daniel Broxterman - 2005/08/26 14:28:42 UTC

While we're on this topic... at Wallaby in April the launch crew put a second weak link in my system between the bridle and the Bailey. I fly with a two point, Wallaby-style release, with a single Bailey secondary.

Does anyone else use two weak links, one on each release point?
You have driving gliders total fucking morons too stupid to be able to be able to configure their weak links to be able to dump a towline when they need to.

http://ozreport.com/9.031
Worlds - Rohan speaks
Rohan Holtkamp - 2005/02/06

The tug pilots wanted 80 kilogram weaklinks on the pilot end and that is EXACTLY what they got.
You have driving tugs total fucking morons...
Davis Straub - 2005/01/25

Weaklinks are a big issue. The problem is that pilots "learn" to make stronger and stronger weaklinks because they do not want to have a weaklink break when it is dangerous (they are low and out of control).
...forcing glider pilots to fly with weak links which break for no reason when it is:
- dangerous when they are low and:
-- out of control;
-- in control;
- safe when they are low and in control until they break;

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.
- safe when they are low and trying to tow up in thermal conditions;

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.
- safe when they are low and trying to tow up in perfectly smooth air.

http://ozreport.com/9.009
2005 Worlds
Davis Straub - 2005/01/11

The weaklink was caught on the release mechanism, a standard spinnaker release found on bridle systems used at Lookout Mountain, Moyes, Wallaby Ranch, and Quest Air.
Everybody who's flying two point and releasing from the top is using a piece of shit known to fail in about seven different ways - even after Robin has just demonstrated three of its shortcomings.
Davis Straub - 2005/01/11

Most pilots here are towing off their shoulders. Those pilots who are also towing off the keel are now required to have a release at the keel if they have a bridle release at their shoulders requiring the bridle line to slip through the (tow ring) that connects to the rope connecting to the tug.
You have towing two point total fucking morons releasing from the bottom with no options for surviving a bridle wrap.

http://www.chgpa.org/forums/viewtopic.php?f=2&t=3391
More on Zapata and weak link
Paul Tjaden - 2008/07/22 04:32:22 UTC

I have never had a lockout situation happen so quickly and dramatically and had no chance to release as I have always thought I could do.
You have towing one point total fucking morons who will have zero chance of releasing in a violent lockout before it's over.

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.
You have towing one point total fucking moron- who will have questionable chances of releasing even in non lockout situations.
Davis Straub - 2005/01/11

Realizing the problem with weaklinks, we will now all be required to fly with a weaklink system (perhaps in addition to our own) that will be supplied by the meet organizers. It will be set for 85 to 90 KG.
You have total fucking morons trying to fix deadly releases by using deadly weak links.

http://ozreport.com/9.026
Death on the flight line
Davis Straub - 2005/01/29

I heard the infamous words - salad bowl with string.
You have total fucking morons stupid enough to think that a headfirst vertical lockout into the ground isn't a particularly big fucking deal - as long one has a good helmet.

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

There does seem to be an issue with the carts. I've been pushing hard on the ones I've used to get them rolling on the rough ground. The wheels do seem to caster, and I got the distinct feeling today that about twenty feet into it, the wheels went totally sideways.

Others have complained about the wheels going full on sideways.
You have dangerous crap you're trying to use as launch dollies.

http://ozreport.com/9.030
The Worlds - Rohan replies to Angelo
Rohan Holtkamp - 2005/02/04

A fifty percent longer ropes gives the pilot a hundred percent more time to react, but Bill Moyes refused to tow with our ninety meter ropes from day one and even after Robin was killed behind a tug with a sixty meter rope.
You have for tug drivers total fucking morons using towlines that cut into the gliders' safety margins for absolutely no reason.
The Director has the power to stop a task after some or all pilots have taken off only in an emergency resulting from hazardous weather or other conditions which could not be avoided by the pilots, and which would endanger their safety.
What the hell more do you need? Name something you assholes WEREN'T doing that was optimized to kill someone. It's amazing that you didn't kill anyone until Day Three.

And THEN?
I understand approximately four further launches had been made at that stage from other lanes.
"Hey, ya think I have enough room to clear Robin and the wreckage? There's a bit of a crosswind I'm a little worried about."
You may feel differently - but perhaps you have just had your appetite for examining rules whetted by attending the short jury seminar.
Since when has Davis ever had the slightest interest in or respect for rules designed to PREVENT pilots from being killed?
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Tad Eareckson
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Re: Weak links

Post by Tad Eareckson »

http://www.youtube.com/watch?v=1yFUkMBhXEg

04-1409
http://farm4.staticflickr.com/3903/14555125331_c930110666_o.png
Image

This is a Hang Three flying Falcon 3 195 behind a 914 Dragonfly - 2012 Stealth edition - dead center in the Cone of Safety with a 0.0 G weak link.

(The Cone of Safety - for those of you who haven't had the benefit of Dr. Trisa Tilletti's tandem training program - is the range of positions behind the Dragonfly in which the glider is immune to lockout.)

He gets hit by a thermal at 0:13, gets rolled 45 degrees to the right and, with a sideways pull on the glider from the towline limited to zero pounds, it takes him four seconds to get things level and under control enough to think about coming back ninety degrees to the middle of the Cone of Safety.

Now let's put a standard aerotow weak link at the top end of his two point bridle and rewind the tape.

Same routine 'cept now with a sideways pull of up to 226 pounds on the glider. Ever try to fight a thermal induced roll with 226 pounds of control input doing the precise opposite of what you're trying to do with your arms?

The minimum legal weak link for that glider would be a loop of 151 pound Greenspot.

Now we have a sideways pull of up to 262 pounds on the glider. Lotsa luck.
Towing Aloft - 1998/01

Speed controlled towing is when the speed of the device doing the towing is maintained at a reasonably constant value. Controls, such as throttle, are used to keep the speed of the tow vehicle or tow winch operating at a constant speed. Towline tension can vary dramatically in response to thermals, sink, pilot corrections, etc. Aerotowing is clearly in this category as the tug needs to maintain a minimum speed to prevent stalling. Many of the early towing efforts of the '70s where the vehicle drove at a fixed speed would also fall into this category. Weak links very clearly will provide protection from excessive angles of attack, high bank turns and the like for this form of towing.
Wallaby Ranch - 2012/09/08

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.
Dr. Trisa Tilletti - 2012/06

Primarily, we want the weak link to fail as needed to protect the equipment, and not fail inadvertently or inconsistently. We want our weak links to break as early as possible in lockout situations, but be strong and reliable enough to avoid frequent weak link breaks from turbulence. It is the same expectation of performance that we have for the weak links we use for towing sailplanes.
Pure unadulterated rot.
Maybe we can hold the glider in the Cone of Safety if we put a fin on it. No, wait - the Falcon 3 IS a goddam fin.
Well, I'm about out of ideas. Anybody else got anything?
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Tad Eareckson
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Re: Weak links

Post by Tad Eareckson »

http://ozreport.com/9.026
Death on the flight line
Davis Straub - 2005/01/29

Angelo says there is no option but to cancel the tasks.

As I pointed out earlier, Worlds meet directors and CIVL officials are quite restricted in their authority to cancel or stop a task. Unsafe weather conditions are the only reason.
BULLSHIT.

Lemme read the regulation to ya, Davis:
The Director has the power to stop a task after some or all pilots have taken off only in an emergency resulting from hazardous weather OR OTHER CONDITIONS WHICH COULD NOT BE AVOIDED BY THE PILOTS, AND WHICH WOULD ENDANGER THEIR SAFETY.
- So are you illiterate, lying, or both?

- There's no such thing as hazardous weather as far as getting a tow competition round off the ground is concerned.

-- If it's too strong and cross or blown out the day's gonna be scrubbed.

-- Thunderstorms and gust fronts don't sneak up behind people on the runway in the middle of tow launches.

-- The only real weather related danger is violent thermal activity and never once in the history of hang gliding competition or towing has operation been suspended or canceled because of violent thermal activity. Violent thermal activity is what competition planners are looking for when they set venues and dates.

-- And, in the entire history of modern hang glider towing, nobody using top notch towing equipment and responsible precautions and procedures has ever been crashed launching into or towing through violent thermal activity.

- What crashes gliders at tow competitions and operations is crap equipment - castering carts, weak links expected to break as early as possible in lockout situations but be strong and reliable enough to avoid frequent breaks from turbulence, dysfunctional releases... - and incompetence - organizers, directors, launch marshals, drivers, competitors. And:
-- this competition was OOZING with all of the above
-- most of the above was what lined up to kill Robin

The fuckin' meet was OOZING with other conditions which could not be avoided by the pilots and which WERE endangering their safety. It shoulda been scrubbed before it ever got started.

http://ozreport.com/9.031
Worlds - Rohan speaks
Rohan Holtkamp - 2005/02/06

The tug pilots wanted 80 kilogram weaklinks on the pilot end and that is EXACTLY what they got.
http://www.hanggliding.org/viewtopic.php?t=26870
weak links
Davis Straub - 2012/08/13 18:08:42 UTC

Used to do 130 lbs. Now do 200 lbs.
Explain to me why standard aerotow weak links are now over TWO AND QUARTER times as heavy as what Bill Moyes, Bobby Bailey, and the other shitheads running that disaster were mandating at Hay and make a case that there weren't other conditions which could not be avoided by the pilots and which WERE endangering their safety - motherfucker.
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Tad Eareckson
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Re: Weak links

Post by Tad Eareckson »

http://ozreport.com/9.031
2007 flex wing Worlds - why Big Spring?
Davis Straub - 2005/02/06

The pilots first.

Too often in the past the choice of a venue for the Worlds has been based on considerations other than what was best for the pilots. For example, Pilots were sent to sites that had very poor soaring conditions. Competition pilots were often not consulted by their CIVL representatives as to where they wanted to go. Hopefully this year competition pilots will have enough information about the possibilities to inform their representatives before the February Plenary makes the decision.
Yeah Davis. It's a real bitch when decisions are based on considerations other than what's best for the PILOTS. For example...

http://ozreport.com/9.022
Worlds organization critique - a response
Davis Straub - 2005/01/25

The problem is that pilots "learn" to make stronger and stronger weaklinks because they do not want to have a weaklink break when it is dangerous (they are low and out of control).
http://ozreport.com/9.031
Worlds - Rohan speaks
Rohan Holtkamp - 2005/02/06

The tug pilots wanted 80 kilogram weaklinks on the pilot end and that is EXACTLY what they got.
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.
http://ozreport.com/12.081
Weaklinks - the HGFA rules
Davis Straub - 2008/04/22 14:47:00 UTC
Pilots must use weaklinks provided by the meet organizers and in a manner approved by the meet organizers. All weaklinks will be checked and use of inappropriate weaklinks will require the pilot to go to the end of the launch line to change the weaklink.

Weaklinks will consist of a single loop of Cortland 130 lb Greenspot braided Dacron Tolling line and should be placed at one end of a shoulder bridle.
http://www.chgpa.org/forums/viewtopic.php?f=2&t=2467
weak links
Jim Rooney - 2007/07/19 14:50:52 UTC

And yes, get behind me with a "strong link" and I will not tow you.
http://www.chgpa.org/forums/viewtopic.php?f=2&t=3600
Weak link question
Jim Rooney - 2008/11/24 05:18:15 UTC

I've personally refused to tow a flight park owner over this very issue. I didn't want to clash, but I wasn't towing him. Yup, he wanted to tow with a doubled up weaklink. He eventually towed (behind me) with a single and sorry to disappoint any drama mongers, we're still friends. And lone gun crazy Rooney? Ten other tow pilots turned him down that day for the same reason.
http://ozreport.com/forum/viewtopic.php?t=24846
Is this a joke ?
Jim Rooney - 2011/08/28 06:15:12 UTC

You may not know, but Davis is a friend of mine.
We have discussed this many times in person. We are not in disagreement.

If you can not see that we're in agreement, perhaps I can clear things up for you. Or Davis can.
Either way, you're the one creating the drama.
http://ozreport.com/forum/viewtopic.php?t=24846
Is this a joke ?
Jim Rooney - 2011/08/25 21:40:25 UTC

Weaklink material... exactly what Davis said.

It's no mystery.
It's only a mystery why people choose to reinvent the wheel when we've got a proven system that works.
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.
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).
http://www.hanggliding.org/viewtopic.php?t=26870
weak links
Davis Straub - 2012/08/13 18:08:42 UTC

Used to do 130 lbs. Now do 200 lbs.
Keep moving in that direction and shoot a few of the motherfuckers who've been circulating equipment, setting procedures and policy, and writing regulations been based on what's WORST for the pilots and I might live long enough to see this stupid corrupt sport get its shit together.
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Tad Eareckson
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Re: Weak links

Post by Tad Eareckson »

http://ozreport.com/9.031
2007 flex wing Worlds - why Big Spring?
Davis Straub - 2005/02/06

What does the Big Spring bid/proposal offer to pilots?

Easy roll out on the taxi ways. We will be taking off from the taxi ways at the airport. There is minimal resistance to the cart rolling and this makes for less strain on the weaklinks.
Yeah Davis. Ya really wanna reduce the strain on the...

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

Here is the requirement from the 2007 Worlds local rules (which I wrote) for weaklinks:
Pilots must use weaklinks provided by the meet organizers and in a manner approved by the meet organizers. All weaklinks will be checked and use of inappropriate weaklinks will require the pilot to go to the end of the launch line to change the weaklink.

Weaklinks will consist of a single loop of Cortland 130 lb Greenspot braided Dacron Tolling line and should be placed at one end of a shoulder bridle.
...Davis Links while the cart is rolling. Sure would be ugly if one were to blow before a glider got airborne.

You want your Davis Link to blow right AFTER you get airborne.

http://groups.yahoo.com/group/hhpa/
Houston Hang Gliding and Paragliding Association
Shane Nestle - 2010/09/17 22:17:50 UTC

So far I've only had negative experiences with weak links. One broke while aerotowing just as I was coming off the cart. Flared immediately and put my feet down only to find the cart still directly below me. My leg went through the two front parallel bars forcing me to let the glider drop onto the control frame in order to prevent my leg from being snapped.
http://www.youtube.com/watch?v=eTKIAvqd7GI

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


And a nice paved taxiway will help you slide to a stop a lot faster than you would on grass or dirt.

Babying a weak link on a takeoff roll makes about as much sense as babying a sidewire before you get airborne...

http://www.hanggliding.org/viewtopic.php?t=13864
My new wing
Frank Peel - 2009/10/03 16:35:50 UTC

Do not STOMP on your wires. It's a good way to kink something that isn't already broken. Instead, have someone show you how to do a proper preflight on that model glider.
...so it won't kink something that isn't already broken...

http://www.hanggliding.org/viewtopic.php?t=17168
450ft PLUMIT--WITHOUT A CHUTE, Does he Live?
Bille Floyd - 2010/05/14 19:48:57 UTC

And thank you state of CALIFORNIA for the money you spent having my spleen removed and patching me back up !!

SO EVERYONE - PLEASE - check that side wire where it disappears into the double surface. I've found two more gliders with the never-kinks twisted off since that crash at Torrey.
...until after you've gotten up a few hundred feet.

Not loading up a weak link while your still on the ground makes about as much sense as not loading up your suspension just prior to launch...

http://www.hanggliding.org/viewtopic.php?t=26996
Critique my radial ramp launch
Ryan Voight - 2012/08/29 01:54:34 UTC

Which leads me to:
"just prior to launch" is open to interpretation.
...'cause you just did a hang check behind the ramp a minute or so ago and...

http://www.shga.com/forum/phpBB3/viewtopic.php?t=3355
Failure to hook in 6/29/12
Gregory Jones - 2012/06/30 03:51:41 UTC

Within a couple of steps the base bar was at my chest and I had that "Oh shit!" feeling.
...you'll be loading it up again within another couple of seconds anyway.

http://www.hanggliding.org/viewtopic.php?t=17330
Take your flying--seriously--OR....
Bille Floyd - 2010/05/26 03:27:41 UTC

After hitting the ground I looked down at where my feet should be and knew it was Bad - then I looked back at my Mom and sighed. I wasn't going to be taking care of her any more.
If you meet-heads weren't the total fucking morons that you are you'd be doing the PRECISE OPPOSITE of what you are now.

You'd have a test station checking gliders before they moved into the launch line. The pilot would would unclip his bridle/release assembly from his shoulders and - if two point - glider, you'd clip it into a test rig with a hydraulic cylinder, and load it to 350 pounds. If anything blew the "pilot" would be fined a hundred bucks, forfeit the round, and be told to have his shit together next time.
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Tad Eareckson
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Re: Weak links

Post by Tad Eareckson »

Hey Davis...

Ya know how hang glider towing was conducted before Donnell rewrote aviation to appeal to total shitheads such as you and your fellow cult members?
Harry Robb - 1975/09

The Tow Line

Q. What type of tow line is used?

A. Polyethylene or polypropylene, 12 strand, braided 3/8 inch line, 500 feet in length is used in competition. Lines for novice flyers should be about 150 feet long, and increased in length as experience is gained. According to the Kiting Handbook by Dan Poynter, this size line has a tensile strength of 2025 pounds.

Each end of the tow line is normally provided with a stainless steel screw-pin shackle with an approximate 3/16 inch shank which fits in the slot of the safety release hook. The screw pin of the shackle is inserted through a loop of the tow line at least 2 or 3 feet, providing sufficient friction to prevent disengagement.

Although some flyers use only the loop of the tow line in the safety release, this practice is not recommended as it greatly accelerates the abrasion and fraying of the line.

Once the line shows very many single strand breaks, its tensile strength is greatly decreased and should be discarded.

No flight should ever be made with a knot in the tow line. Aside from the abrasion caused by the knot rubbing on itself, the tensile strength is decreased by as much as fifty percent.

Lines require constant inspection - prior to the first flight of every day by every flyer. In a tournament, the Lineman Starter can inspect some portions of the line on each flight, and the Safety Inspector will inspect the entire line slowly, foot-by-foot, two or three times daily.

The tow line is a life line and must be treated with utmost respect.
They're doing everything they can to make sure that nobody hooks up to a system that's got the slightest possibility of disintegrating.

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

Here is the requirement from the 2007 Worlds local rules (which I wrote) for weaklinks:
Pilots must use weaklinks provided by the meet organizers and in a manner approved by the meet organizers. All weaklinks will be checked and use of inappropriate weaklinks will require the pilot to go to the end of the launch line to change the weaklink.

Weaklinks will consist of a single loop of Cortland 130 lb Greenspot braided Dacron Tolling line and should be placed at one end of a shoulder bridle.
YOU'RE doing everything you can to make sure that EVERYBODY hooks up to a system that's got...

http://ozreport.com/9.011
2005 Worlds
Davis Straub - 2005/01/13

Tom Lanning had four launches, and two broken weaklinks and a broken base tube. He made it just outside the start circle.
...about a fifty/fifty chance of disintegrating.

Better than that...

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.
...on a good day.

Gawd, it must be horrible to have such total shit for brains that you have no fuckin' clue that you have total shit for brains.
Steve Davy
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Re: Weak links

Post by Steve Davy »

That's odd. I imagine it's wonderful for Davis to have such total shit for brains that he has no fuckin' clue that he has total shit for brains.
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Tad Eareckson
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Re: Weak links

Post by Tad Eareckson »

Yeah, I considered that but...

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

And it sure is hell for everyone under the control...

http://ozreport.com/forum/viewtopic.php?t=24534
It's a wrap
Davis Straub - 2011/07/30 19:51:54 UTC

I'm very happy with the way Quest Air (Bobby Bailey designed) does it now.
...of his cult.
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