BlindBrick 0 #1 October 13, 2004 I was looking at my non-collaspible PC the other day when I realized that inisde it had a line running to the apex that would be pretty easy to rig a kill line to. I've got more enough materials to make a kill-line bridle. The problem is that I've never looked too closely at how a kill line PC works. I mean I know the theory, I just don't know the implementation. Just visualizing the system, I was thinking that once the canopy left the d-bag, the drag on the empty bag made it fall at a slower rate than the canopy, which in turn allowed the canopy to draw the kill-line and collapse the PC. Am I even in the ballpark? If not any suggestions? I know I could always just buy a kill-line setup, but I would really like to learn this kind of stuff. Plus, the way I am visualizing it, as long as the bridles attached, cocked and has integrity, the worse problem I could have with a bad implementation is failure to collapse the PC. Am I on the right track, or is there another failure scenario I am overlooking? -Blind"If you end up in an alligator's jaws, naked, you probably did something to deserve it." Quote Share this post Link to post Share on other sites
hookitt 1 #2 October 13, 2004 Go for it. Copy the functionality of another pilot chute. Have it looked over before you use it. That's what R and D (rip off and duplicate) is all about. Quote Share this post Link to post Share on other sites
wmw999 2,584 #3 October 13, 2004 I put a new pilot chute onto the collapsible bridle on mine, and it's been working just fine. I agree, go for it. It's pretty easy to do a car test with to see if it will inflate. Just make sure if it fails, that it fails by not collapsing, rather than by not inflating. Wendy W.There is nothing more dangerous than breaking a basic safety rule and getting away with it. It removes fear of the consequences and builds false confidence. (tbrown) Quote Share this post Link to post Share on other sites
f1shlips 2 #4 October 13, 2004 QuoteThat's what R and D (rip off and duplicate) is all about. ...and diet coke goes flying out my nose. I gotta show that to the boss tomorrow.-- drop zone (drop'zone) n. An incestuous sesspool of broken people. -- Attributed to a whuffo girlfriend. Quote Share this post Link to post Share on other sites
councilman24 37 #5 October 13, 2004 The line in the non collapsalble is the line which pulls the apex down. This line stays intact in a collapsable. This line is usually double and very important. It sets the "height" of the apex in relation to the "skirt", the edge of the solid fabric. It looks like the top of an apple when inflated. The kill line is an ADDITIONAL line. The bag end all work on the same principle but vary in execution. Take care and make sure the failure mode is to the corrent configuration. The kill line is not the only attatchment of the bag/bridle assembly. There is a keep tape or line of some sort to keep the bag from going to far. Good luck.I'm old for my age. Terry Urban D-8631 FAA DPRE Quote Share this post Link to post Share on other sites
masterrig 1 #6 October 13, 2004 Your mentioning the 'car test', reminded me of an incident. Years ago, before collapsible pilotchutes, I was asked to make a 36" pilotchute for one of our jumpers. He came-by a few days later to pick it up. He called me the next day to tell me he had a dis-located shoulder. I of course, asked how it happened. Seems that, on his way home, he got up to 55mph and reached his arm out the car window and launched his new pilotchute! Chuck Quote Share this post Link to post Share on other sites
wmw999 2,584 #7 October 13, 2004 Yeah, 55 mph is not a real good idea... I, of course, have never had a bad idea... Wendy W.There is nothing more dangerous than breaking a basic safety rule and getting away with it. It removes fear of the consequences and builds false confidence. (tbrown) Quote Share this post Link to post Share on other sites
masterrig 1 #8 October 13, 2004 Me either! Chuck Quote Share this post Link to post Share on other sites
