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freebird

Safety

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These questions might be better placed in the gear and rigging or safety and training forums.
But anyway, what you're asking about is why Relative Workshop, Sunpath and Rigging Innovations (among others) offer cutaway housing "tubes" - basically these are hard tubes that technically should keep the cutaway cables from being trapped by the line twists. Usually only needed if you're jumping a highly loaded elliptical canopy that is prone to really nasty line twists.
pull and flare,
lisa
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In addition to possibly asking these questions in the Saftey forum since more Saftey and Training Advisors read that area then this area, talk to your Jumpmasters. They tend to have personal experiences involving some of the questions and their personal insights might help you remember something that could save your life in the future.
As of the line twists, this mainly becomes a problem on highly loaded canopys. Sure it can happen on lighter loaded canopies, but its not that big of a deal once you start kicking out of them. On highly loaded canopies, they tend to go into a dive with line twists and need cutaway. Manufactors are realizing this now and are adding hard riser inserts to make the cutaway as easy as possible. The cable will bend so its not going to interfere with a cutaway in most instances.
I want to touch the sky, I want to fly so high ~ Sonique

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I believe that people are not keeping wing loading in perspective. One situation that has become aparent on supposedly NOT heavily loaded canopies is that with the combination of medium loaded canopies (1.0-1.4 lbs./sq ft.) and soft type links is that the slider comes down past the top of the risers and knocks one toggle off its' keeper. The canopy then goes into uncontrollable line twists and dives with twists all the way to the risers. So you see, there is a "Line Twist" malfunction that can occur on even "medium" loaded canopies that can cause a hard pull. The price of the housing inserts is like two jump tickets. Big deal. What's your life worth? There seem to be no drawbacks from this modification so there seems to be, at this time, no arguement against getting them installed. And you'll know that they'll be there for when you do downsize maybe in the future to a canopy that has this potential. It won't have to be a mod that is added later after a hard pull. Just hope it doesn't come to the situation of your friends standing around going "Damn, I wonder why he/she didn't cutaway? I guess we will never know."
You all be safe out there. When you think it CAN happen to you you'll be ahead of the game.
Chris Schindler
D-19012
ATP/CFII
www.DiverDriver.com

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Chris, that is a very good point about a diving spirl caused by a popped brake. What I've found is the best prevention to this type of problem is to have toggle hoods on your toggles that are slightly over sized and cover the entire top plus leave some slack in the at the top of the elastic. The slack kinda forms a ramp that a rapidly decending slider just slides down and over. If the hood is too short and lets part of the toggle show, a slider that is coming down from a fast opening can hit it hard enough to knock it out and that will pop the brake.
I want to touch the sky, I want to fly so high ~ Sonique

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