My ground hogging rig

[Quagmirian 40]

Here's a little something I'm working on. It's an all in one system for amateur aviation, like parasailing or ground launching, not skydiving. It doesn't even have a deployment method for either of the wings.

Cutaway video
[URL "http://s172.photobucket.com/albums/w35/quag_04/Parachute/HPIM4062.jpg"][IMG]http://i172.photobucket.com/albums/w35/quag_04/Parachute/th_HPIM4062.jpg[/IMG][/URL]
[URL "http://s172.photobucket.com/albums/w35/quag_04/Parachute/HPIM4061.jpg"][IMG]http://i172.photobucket.com/albums/w35/quag_04/Parachute/th_HPIM4061.jpg[/IMG][/URL]
[URL "http://s172.photobucket.com/albums/w35/quag_04/Parachute/HPIM4060.jpg"][IMG]http://i172.photobucket.com/albums/w35/quag_04/Parachute/th_HPIM4060.jpg[/IMG][/URL]
[URL "http://s172.photobucket.com/albums/w35/quag_04/Parachute/HPIM4059.jpg"][IMG]http://i172.photobucket.com/albums/w35/quag_04/Parachute/th_HPIM4059.jpg[/IMG][/URL]
[URL "http://s172.photobucket.com/albums/w35/quag_04/Parachute/HPIM4058.jpg"][IMG]http://i172.photobucket.com/albums/w35/quag_04/Parachute/th_HPIM4058.jpg[/IMG][/URL]

[JohnnyMarko 1]

I like that you seem shocked when you yanked the cutaway handle and nothing exciting happened.

[BIGUN 1,314]

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Here's a little something I'm working on. It's an all in one system for amateur aviation, like parasailing or ground launching, not skydiving. It doesn't even have a deployment method for either of the wings.

Cutaway video
[URL "http://s172.photobucket.com/albums/w35/quag_04/Parachute/HPIM4062.jpg"][IMG]http://i172.photobucket.com/albums/w35/quag_04/Parachute/th_HPIM4062.jpg[/IMG][/URL]
[URL "http://s172.photobucket.com/albums/w35/quag_04/Parachute/HPIM4061.jpg"][IMG]http://i172.photobucket.com/albums/w35/quag_04/Parachute/th_HPIM4061.jpg[/IMG][/URL]
[URL "http://s172.photobucket.com/albums/w35/quag_04/Parachute/HPIM4060.jpg"][IMG]http://i172.photobucket.com/albums/w35/quag_04/Parachute/th_HPIM4060.jpg[/IMG][/URL]
[URL "http://s172.photobucket.com/albums/w35/quag_04/Parachute/HPIM4059.jpg"][IMG]http://i172.photobucket.com/albums/w35/quag_04/Parachute/th_HPIM4059.jpg[/IMG][/URL]
[URL "http://s172.photobucket.com/albums/w35/quag_04/Parachute/HPIM4058.jpg"][IMG]http://i172.photobucket.com/albums/w35/quag_04/Parachute/th_HPIM4058.jpg[/IMG][/URL]

I'm just kinda curious... I get that the first wing would be "like" a ground/para launch.
But, if neither wing has a deployment method, then if you're at altitude and cutaway; how does the second wing deploy?

Nobody has time to listen; because they're desperately chasing the need of being heard.

[PhreeZone 20]

Is that E/F thread or 5 cord on the WW Box pattern?

Yesterday is history
And tomorrow is a mystery

Parachutemanuals.com

[theonlyski 8]

The 3-rings look a bit too spaced out to me. (built incorrectly?)

Could be why you had to yank on the riser to get a release.

Furthermore, what kind of webbing is that? Not TY 7 or 8.

Nice job sewing it, some pretty nice patterns going on there, but I wouldn't trust my life to it.

"I may be a dirty pirate hooker...but I'm not about to go stand on the corner." iluvtofly
DPH -7, TDS 578, Muff 5153, SCR 14890
I'm an asshole, and I approve this message

[Deyan 36]

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Furthermore, what kind of webbing is that? Not TY 7 or 8.

It looks like TY 13....

"My belief is that once the doctor whacks you on the butt, all guarantees are off" Jerry Baumchen

[ctrph8 0]

I'd agree about the 3 rings looking too widely spaced... and the comment about great sewing otherwise! It looks like there would be a ton of pressure on the webbing for the smallest ring. The easy fix would be to use some factory made risers.

I got the brilliant idea that I was going to make my own risers a few years ago . The more I got into it, the more I realized exactly how much technical expertise goes into risers. I'll leave that to the professionals.

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The 3-rings look a bit too spaced out to me. (built incorrectly?)

Could be why you had to yank on the riser to get a release.

Furthermore, what kind of webbing is that? Not TY 7 or 8.

Nice job sewing it, some pretty nice patterns going on there, but I wouldn't trust my life to it.

[airtwardo 7]

What exactly are you looking to achive?

I guess I don't understand what it's for or does?

~ If you choke a Smurf, what color does it turn? ~

[Quagmirian 40]

@BIGUN Kinda like a skyhook, like this http://www.youtube.com/watch?v=IqtC5w4vrZg

@Phreezone I just used polyester from the shop, for what I assume you mean is the pattern on the main lift web below the big ring

@theonlyski Jeff sent me a manual on how to make proper risers, and I had to sew it on a home machine. The webbing is just polypropylene from a craft shop

@airtwardo I should have explained, the 3 rings are for cutting away in high winds, the rig itself is just for ground launching or towing

[PhreeZone 20]

So you are using unrated webbing that is made out of unknown materials with an unknown breaking limit in a critical lifesaving function?

The polyester thread is rated to what strength?

I am not seeing anything in the assembly that would be too bad if it was done with the appropriate materials.

Yesterday is history
And tomorrow is a mystery

Parachutemanuals.com

[dqpacker 7]

how much did you spend on materials? because you could have bought someone's old 80's racer or vector container for a couple hundred bucks. also buy some real risers, they're not that much.

[Beatnik 2]

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So you are using unrated webbing that is made out of unknown materials with an unknown breaking limit in a critical lifesaving function?

The same with most climbing harnesses and paragliding harnesses out there. Which could be classified as lifesaving in certain situations. For what he is doing with it, I don't see it as any more of a problem than those two.

[ctrph8 0]

I know that all of my paragliding and climbing gear has been made with known and tested materials. There are a few companies that use lesser materials but all of the big players have a reputation on the line and can't afford the bad publicity (or just for the ethical reasons of not killing people) of not using properly rated materials.

The problem here is not only the materials, but with the technique. Again, considering what he did, it is an admirable attempt, but even looking at the way the grommet was set into the risers, there are problems with the design and construction techniques.

I'd suggest that the OP consider this a first draft, get with a grumpy old Master Rigger and get him to guide you.

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So you are using unrated webbing that is made out of unknown materials with an unknown breaking limit in a critical lifesaving function?

The same with most climbing harnesses and paragliding harnesses out there. Which could be classified as lifesaving in certain situations. For what he is doing with it, I don't see it as any more of a problem than those two.

[Beatnik 2]

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I know that all of my paragliding and climbing gear has been made with known and tested materials. There are a few companies that use lesser materials but all of the big players have a reputation on the line and can't afford the bad publicity (or just for the ethical reasons of not killing people) of not using properly rated materials.

Pretty much every climbing harness out there is made with needle woven webbing which is not critical use. This includes most of the big players. Many of the paragliding harnesses are the same. I would look at the webbing again at your climbing and paraglider gear.

[PhreeZone 20]

All major paragliding harnesses are constructed and tested to a standard, usually LTF 91/09 since that is the newest standard. This is a well documented standard similar to TSO standards. The webbing and materials used are well defined and they do testing up to +35G's in some of the tests.

There is no way I would go to a local craft store and buy random nylon webbing to use as risers.

I can't tell but were any wear bands put under the RW8 ring to prevent the metal on nylon from wearing at the materials?

Yesterday is history
And tomorrow is a mystery

Parachutemanuals.com

[Beatnik 2]

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All major paragliding harnesses are constructed and tested to a standard, usually LTF 91/09 since that is the newest standard. This is a well documented standard similar to TSO standards. The webbing and materials used are well defined and they do testing up to +35G's in some of the tests.

Constructed to a standard is not what I am talking about. I am talking about the materials and I don't see them listed in the certifications that I am looking at. The testing I am looking at is requiring a 10 - 15 KN load. Which is much below a 35G test.

I don't think buying random webbing is a good idea. I would have personally never built that. All I am saying is for ground launch or towing it probably okay.

[skydiverek 63]

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The 3-rings look a bit too spaced out to me. (built incorrectly?)

Yes. See this:
http://www.unitedparachutetechnologies.com/index.php?option=com_content&task=view&id=41

[shropshire 0]

Buy a 2nd hand Paragliding (it's not parasailing btw) or speed-riding harness - it's what they were designed, built and tested for!!

There's a reason why we use them ... cus they work and they are comfortable for extended flights.

Also - make sure that you get tuition and only fly in the U.K where authorised so to do........ join a club.

(.)Y(.)
Chivalry is not dead; it only sleeps for want of work to do. - Jerome K Jerome

[BrianM 1]

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@BIGUN Kinda like a skyhook, like this http://www.youtube.com/watch?v=IqtC5w4vrZg

@airtwardo I should have explained, the 3 rings are for cutting away in high winds, the rig itself is just for ground launching or towing

Maybe I'm just confused, but those two statements seem contradictory. If the cutaway is just for high winds, how do you expect to deploy the second canopy like a skyhook?

"It's amazing what you can learn while you're not talking." - Skydivesg