suspension

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

Re: suspension

Post by Tad Eareckson »

So was the finished length of the weak link 1.5 inches or less or not? Stop beating around the bush.

The hook knife you're OK on. It just needs to be within easy reach and yours was just as easily reachable as Jeff Bohl's appropriate bridle was a year plus 25 days ago.
User avatar
<BS>
Posts: 422
Joined: 2014/08/01 22:09:56 UTC

Re: suspension

Post by <BS> »

So why do you think that I did not install a back-up release..?
'Cause that new prototype self-corrects before you get into too much trouble?
Steve Davy
Posts: 1338
Joined: 2011/07/18 10:37:38 UTC

Re: suspension

Post by Steve Davy »

Also worth mentioning is that during those flights there was no provision for cutting the line at the front end, thus no observer ready to make a good decision in the interest of my safety. I told Erich to keep going until he was certain that I had terminated a tow and that is exactly what he did.
User avatar
Tad Eareckson
Posts: 9161
Joined: 2010/11/25 03:48:55 UTC

Re: suspension

Post by Tad Eareckson »

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

Nice Reference Citation
Ridgerodent:
Manned Kiting
The Basic Handbook of Tow Launched Hang Gliding
Daniel F. Poynter
1974

"The greatest dangers are a rope break or a premature release."- Richard Johnson
Do you REALLY think that there has been no progress in knowledge about the practical applied physics and engineering of hang gliding in 37 years? OR that an early, 3+ decade old, information book written by a non-pilot is a solid reference when you have multiple high experience current instructors involved in the discussion?
http://ozreport.com/forum/viewtopic.php?t=30971
Zach Marzec
Jim Rooney - 2013/02/16 05:05:41 UTC

My general rule is "no funky shit". I don't like people reinventing the wheel and I don't like test pilots. Have I towed a few test pilots? Yup. Have I towed them in anything but very controlled conditions? Nope. It's a damn high bar. I've told more to piss off than I've told yes. I'll give you an example... I towed a guy with the early version of the new Lookout release. But the Tad-o-link? Nope.

So I hope that sheds some light on the situation.
But again, every tuggie's different and every situation is different.
What doesn't change however is that it's my call, not yours.
And it's my job to be the "bad guy" sometimes.
Sorry. It's just the way it is.
Steve Davy
Posts: 1338
Joined: 2011/07/18 10:37:38 UTC

Re: suspension

Post by Steve Davy »

Steve Davy wrote:During those test flights I had no back-up release, thus no way to abort a tow in an emergency situation if my release had failed. It would have been real super easy to install a back-up release.

So why do you think that I did not install a back-up release, Miguel?
Take your time on a reply to my question, Miguel.
User avatar
Tad Eareckson
Posts: 9161
Joined: 2010/11/25 03:48:55 UTC

Re: suspension

Post by Tad Eareckson »

Jump to next post:
http://www.kitestrings.org/post11599.html#p11599

Just stumbled upon another gem from Harrison Rowntree. First discovery on behalf of Kite Strings:

http://www.youtube.com/watch?v=jT9p2jyg_l4


courtesy Steve - 2013/12/12 02:41:26 UTC.

http://www.kitestrings.org/post5449.html#p5449

That one's shortly before Harrison posts:

42-05328
http://farm8.staticflickr.com/7309/11414153476_3ca8cc4036_o.png
Image

on behalf of the dope on the bottom end of that rope.

http://www.youtube.com/watch?v=TzlewJ7Wx9E
Hang Gliding Around Coonalpyn, South Australia
Harrison Rowntree - 2017/04/04

http://www.youtube.com/watch?v=TzlewJ7Wx9E


I got mum to tow me up from our olive farm outside Coonalpyn. It was late in the day and a challenge to get up but once I was up, I was cruising. I almost made it home. Everything got a bit shaded and it was late in the day.
01-00026
- 01 - chronological order
- -0 - minutes
- 00 - seconds
- 26 - frame (60 fps)

01-00026
http://live.staticflickr.com/65535/48220785936_f6dc81ebb3_o.png
Image
02-00342
http://live.staticflickr.com/65535/48220785566_0465a6d539_o.png
Image
03-00422
http://live.staticflickr.com/65535/48220785246_8b903b6c6b_o.png
Image
04-00446
http://live.staticflickr.com/65535/48220784986_2659eb6cc3_o.png
Image
05-00556
http://live.staticflickr.com/65535/48220784671_ebc2fd92d0_o.png
Image
06-01210
http://live.staticflickr.com/65535/48220784511_7b69446a2d_o.png
Image
07-01412
http://live.staticflickr.com/65535/48220833077_28654cfee5_o.png
Image
08-01500
http://live.staticflickr.com/65535/48220784076_f026489c59_o.png
Image
09-01506
http://live.staticflickr.com/65535/48220832617_f4e201ac3f_o.png
Image
10-01518
http://live.staticflickr.com/65535/48220783566_ee86bf9ca0_o.png
Image
11-01524
http://live.staticflickr.com/65535/48220783221_a6dff2c51c_o.png
Image
12-01534
http://live.staticflickr.com/65535/48220831527_4ce2edc70d_o.png
Image
13-01540
http://live.staticflickr.com/65535/48220782531_954fd8ec66_o.png
Image
14-01550
http://live.staticflickr.com/65535/48220782346_027d85ec34_o.png
Image
15-01608
http://live.staticflickr.com/65535/48220782196_c1b24cc51b_o.png
Image
16-01618
http://live.staticflickr.com/65535/48220830662_1b0d20c71f_o.png
Image
17-01644
http://live.staticflickr.com/65535/48220830447_6571d086a2_o.png
Image
18-01716
http://live.staticflickr.com/65535/48220781561_40a4532b47_o.png
Image
19-02224
http://live.staticflickr.com/65535/48220781321_2f8a86a8ab_o.png
Image
20-02534
http://live.staticflickr.com/65535/48220829322_b01d3b3d04_o.png
Image
21-03024
http://live.staticflickr.com/65535/48220780376_5d312178d3_o.png
Image
22-03612
http://live.staticflickr.com/65535/48220828812_31e2ddec46_o.png
Image
23-05054
http://live.staticflickr.com/65535/48220828662_bbe40a3c90_o.png
Image
24-10730
http://live.staticflickr.com/65535/48220828477_0b175c156b_o.png
Image
25-11456
http://live.staticflickr.com/65535/48220828277_65f772be3b_o.png
Image
26-11640
http://live.staticflickr.com/65535/48221918902_42eee60fff_o.png
Image
27-12940
http://live.staticflickr.com/65535/48220828087_5e4df1d1ac_o.png
Image
28-13058
http://live.staticflickr.com/65535/48220779341_e22e030ba8_o.png
Image
29-13212
http://live.staticflickr.com/65535/48220779036_53eb1b6e87_o.png
Image
30-13304
http://live.staticflickr.com/65535/48220778431_78dd3882d0_o.png
Image
31-13626
http://live.staticflickr.com/65535/48220778226_3a91ce1483_o.png
Image
32-14002
http://live.staticflickr.com/65535/48220777966_3637c3a533_o.png
Image
33-14158
http://live.staticflickr.com/65535/48220826362_1c16f98fc1_o.png
Image
34-14440
http://live.staticflickr.com/65535/48220826127_c9119f2df0_o.png
Image
35-14552
http://live.staticflickr.com/65535/48220825812_428ee58451_o.png
Image
36-14650
http://live.staticflickr.com/65535/48220825542_9c37cf690c_o.png
Image
37-14950
http://live.staticflickr.com/65535/48220776851_e853e96d22_o.png
Image
38-15058
http://live.staticflickr.com/65535/48220776316_844b525461_o.png
Image
39-15128
http://live.staticflickr.com/65535/48220776096_c321bcf8d7_o.png
Image
40-15146
http://live.staticflickr.com/65535/48220824307_24a8e03fed_o.png
Image

Gotta love all those safety mechanisms and procedures the sport has to solve nonexistent problems. Locking carabiner in case the suspension figures out some way to escape from the spring loaded gate, helmet in case of a launch or landing crash but no wheels or skids to prevent or greatly mitigate a launch or landing crash, shorts, total piece o' crap Peter Holloway bridle/release assembly, entire fuckin' tow bolt upright with hands high on the control tubes.

Jonathan scooped the rest of us on the unsecured and rotated carabiner issue:
Vicarious Icarus

Hey mate. Please secure your carabiner to your riser so you don't wind up in free-fall after your gate fails. See 0:20 in the vid. Cheers, Jonathan
Harrison Rowntree

Vicarious Icarus thanks. Someone else noticed it and had the same suggestion. A neoprene sleeve to slide over it would become a good practice and stop it from rotating after its hooked in.
Vicarious Icarus

I use a few cross-crosses of 2mm tent pole elastic tied off with a simple square knot. Woody Valley uses a rubber O ring and does a clever twist over the top of the riser loop and back down to the opposite side of the biner. A piece of discarded bicycle inner tube really works a treat and lasts a while neoprene has a short life.
EDIT - Be certain to also secure your reserve parachute riser to the quick link so that it pulls lengthwise from the bend and not sideways from the straight.
Nah Jonathan, the gate won't/can't fail but it could destroy the parachute leader connection in the (highly unlikely) event of a high speed deployment. And you're higher off the control bar than you intended to be. (And don't use a quick link on the connection. Secure things such that the leader loop will ride up the carabiner's spine.)

Longridge Olives, 174 Ware Road, Netherton SA, Australia - Harrison's family business, home launch site.

35°33'16.53" S 140°01'21.94" E - the point at which he lands in the weak link video. (Probably also his launch point.)

Only 33 crowflight miles WSW of Lameroo and a bit over 22 of the Lameroo AT operation - 35°23'20.22" S 140°20'31.52" E - at which Anonymous was pulled upside down by the Tad-O-Link that failed to succeed when it was supposed to.

Jump to top:
http://www.kitestrings.org/post11598.html#p11598
Steve Davy
Posts: 1338
Joined: 2011/07/18 10:37:38 UTC

Re: suspension

Post by Steve Davy »

...entire fuckin' tow bolt upright with hands high on the control tubes.
If he goes prone that total piece o' crap Peter Holloway bridle is going to hit him on the head and then make its way down and start rubbing on his neck. :lol:
User avatar
Tad Eareckson
Posts: 9161
Joined: 2010/11/25 03:48:55 UTC

Re: suspension

Post by Tad Eareckson »

Nah, it releases at the bridle apex...

036-015726
http://farm8.staticflickr.com/7200/14097578083_ef7fc870eb_o.png
Image
053-015814
http://farm8.staticflickr.com/7178/14074320411_58c4b1f5c1_o.png
Image

But good catch anyway. Yeah, it's not like he has a choice - after electing to go with that crap anyway.

Koch two stage...

17-3308
http://c2.staticflickr.com/6/5568/14262572599_a25fc9e124_o.png
Image
18-3310
http://c2.staticflickr.com/4/3883/14469388913_f8e58be2f7_o.png
Image
39-4008
http://c1.staticflickr.com/3/2896/14262563459_492b138cbf_o.png
Image
40-4010
http://c1.staticflickr.com/3/2921/14262605698_eefd269b97_o.png
Image

Actually DESIGNED to do the fuckin' job - in the early EIGHTIES.

Or...

04-00221
http://c1.staticflickr.com/9/8043/29698757925_37caa62bc0_o.png
Image
12-22210
http://c1.staticflickr.com/5/4838/44991725784_04c0be6dfc_o.png
Image
20-22804
http://c1.staticflickr.com/9/8262/29074014833_6b92a0f6d7_o.png
Image

Can anybody think of another sport or flavor of aviation in which such huge factions of it have managed to drag evolution BACKWARDS to such degrees?

P.S. That was the last YouTube video Harrison ever posted of anything. Guessing he's dropped out of the sport. If so - too bad. He had a really fantastic situation going for him down there.

P.P.S. Fuck you, Rick Masters.
Steve Davy
Posts: 1338
Joined: 2011/07/18 10:37:38 UTC

Re: suspension

Post by Steve Davy »

I suspect that the bridle would contact his helmet and then make its way down and start rubbing on his neck while he's still on tow.
User avatar
<BS>
Posts: 422
Joined: 2014/08/01 22:09:56 UTC

Re: suspension

Post by <BS> »

That bridle definitely looks in the way at this point of the tow.
Image
It's easier to see from the side.

http://www.youtube.com/watch?v=oerbPQ7KgmQ
Post Reply