cvfd1399 0 #1 December 12, 2003 I an a pretty scientific type of person I like to know how everything works. I see that most rigs are rated webbing 6000# and hardware 5000# and lines go anywhere from 500#-750#. What kind of loading in pounds is put on each canopy line and the set of lines as a whole on deployment(ballpark). I realize that opening speed, pack job type used, and user weight will affect that number. Is there a formula of speed vs weight that can get close to the actual number? I was just wondering how close the rig comes to the limits of the material. I realize it is designed not to come within a percentage of the max weight. It would just be cool to know 5-10% 25% of the strength of the material Quote Share this post Link to post Share on other sites
mjosparky 4 #2 December 12, 2003 The weak link on your gear is the hardware. Most hardware used on sports rigs is rated at 2500 lb. Very rarely will deployment loads exceed what the harness as a unit has been tested too. More then likely, if you cause heavy damage to the harness, you will have heavy damage to yourself. In test situations I have taken 3600 lb. per side and it hurt like hell. SparkyMy idea of a fair fight is clubbing baby seals Quote Share this post Link to post Share on other sites
atsaubrey 0 #3 December 12, 2003 3600lbs per side?? of the harness? not sure on your answer"GOT LEAD?" Quote Share this post Link to post Share on other sites
cvfd1399 0 #4 December 12, 2003 How did you "take 3600 lb per side"? what kind of test was it. Were you jerked somehow in a harness with 3600 pounds per side? That would add up to 6400 total on your body that is 3.2 tons. Quote Share this post Link to post Share on other sites
mjosparky 4 #5 December 13, 2003 Both risers had strain gauges called SOMATS and measure the load and duration. They can pick up 4 to 10 test points. Chad, how long have you been a Firefighter?My idea of a fair fight is clubbing baby seals Quote Share this post Link to post Share on other sites
cvfd1399 0 #6 December 13, 2003 Most people don't believe me when I say this but since I was 16. We had what they call a explorer program at my department. It was sort of like the boy scouts but here if you complete all the training that a real firefighter had to do you could start running calls and fighting fires. They covered us with 50k in insurance each. The only thing you could not do is drive until you were 18(now 21). When I did turn 18 I got hired on full time and have been working C shift for 2 1/2 years. So total I would say 6 1/2 years. My dad works at the same department I work at. It was funny I have 5 friends that I graduated school with that were in the program and we all got hired on at the same time. So I have 5 childhood friends and my dad working at the same place. Nothing but a big family. I am a search and rescue diver and a emt as well. Right now i am close to graduating from the police academy to become a reserve deputy. I have come to the conclusion that I am a adrenaline junky! I wouldn't change it for the world! Quote Share this post Link to post Share on other sites
riggerrob 643 #7 December 13, 2003 For engineering answers to questions about opening shock, start by reading the chapters in Poynter's manuals http://www.parapublishing.com/parachute/resources.html that relate to drop testing. Next read what Theo Knacke says in the "Parachute Recovery Systems Design Manual" and finish your homework by reading the latest TSO (C23D) drop test standards published by the FAA.Javelin & Javelin Odyssey now approved to TSO-C23d! For example:"The Javelin and Javelin Odyssey have recently been certified by the FAA for the highest TSO rating currently available: TSO C23d. The placarded limits will be max. gross exit weight of 300 lbs (136 kg) and a maximum deployment speed of 170 knots (198 mph or 330 kph). The actual test speed and weight were much higher: 360 lbs measured at 200 knots, proving the strength and integrity of the world’s most comfortable harness/container system. An interesting fact: the highest single riser load measured during testing was in excess of 9000 lbs." Quote Share this post Link to post Share on other sites
CrazyIvan 0 #8 December 13, 2003 Clicky: http://www.parapublishing.com/parachute/resources.html __________________________________________ Blue Skies and May the Force be with you. Quote Share this post Link to post Share on other sites
alan 1 #9 December 13, 2003 And the PM feature is still working.alan Quote Share this post Link to post Share on other sites
kallend 2,146 #10 December 13, 2003 Very comprehensive study of this stuff is here: www.pcprg.com/pcraps.htm... The only sure way to survive a canopy collision is not to have one. Quote Share this post Link to post Share on other sites
mjosparky 4 #11 December 18, 2003 Also read Aerospace Standard 8015 Rev. B.My idea of a fair fight is clubbing baby seals Quote Share this post Link to post Share on other sites
KellyF 16 #12 December 18, 2003 QuoteIs there a formula of speed vs weight that can get close to the actual number? G force= Final Velocity- Initial Velocity/ Time. Multiply suspended weight by the G force to find out the AVERAGE load over the time period. This will not give any information on load peaks or spikes. Quote Share this post Link to post Share on other sites
