parafredo 0 #1 August 24, 2015 Any riggers out there ever see or heard about a correctly loading reserve canopy that got the middle cell blew out from a terminal opening , under 130 knots Quote? 2004 made. Quote Share this post Link to post Share on other sites gowlerk 1,910 #2 August 24, 2015 I have not. But I'm very curious about the estimated speed at the terminal opening. Were there any factors that would indicate excessive speed?Always remember the brave children who died defending your right to bear arms. Freedom is not free. Quote Share this post Link to post Share on other sites Hooknswoop 19 #3 August 25, 2015 Raven -M's have been known to fail while within weight & speed maximums. That is why it is Precision Aero now and not Precision Aerodynamics anymore. Derek V Quote Share this post Link to post Share on other sites masterrigger1 2 #4 August 25, 2015 Quote Any riggers out there ever see or heard about a correctly loading reserve canopy that got the middle cell blew out from a terminal opening , under 130 knots Yes, the failures were located at the point of a previous tensile test on a tandem reserve. MELSkyworks Parachute Service, LLC www.Skyworksparachuteservice.com Quote Share this post Link to post Share on other sites riggerrob 558 #5 August 25, 2015 I saw a Raven Dash-M that tore in 3 places. The jumper was over-weight, over-speed and unstable when he scared his Cypres. How many more mistakes can you make and expect to survive? One thing that might have prevented catastrophic failure was more span-wise reinforcement tapes. SWRT are now standard on canopies designed to be loaded more than 1 pound per square foot. For example, I have one jump on a Precision RMax-118 reserve loaded "to the top edge of the chart" and it flew just fine and landed me softly. I would never buy a resrerve that small, but would seriously consider buying an RMax-150 or 170. Raven Dash-Ms also had problems with line attachment tapes failing. Precision tried to save weight/bulk by using lighter line attachment tapes. The solution was to replace wimpy Type 3 tape with Type 1 webbing. Most ram-air mains are built with Type 3 tape for line attachments and they last 2,000 or 3,000 jumps. 3/4 inch wide Type 4 tape is rated for 400 pounds. Since reserves open harder, most manufacturers use tougher Type 1 webbing rated for 500 pounds. For comparison, tandems use even stronger tapes for line attachments (e.g. 1 inch wide Type 4 tape rated for 1,000 pounds). Quote Share this post Link to post Share on other sites Deyan 31 #6 August 25, 2015 riggerrob Most ram-air mains are built with Type 3 tape for line attachments and they last 2,000 or 3,000 jumps. 3/4 inch wide Type 3 tape is rated for 400 pounds. I guess it was a typo. Now it's fixed "My belief is that once the doctor whacks you on the butt, all guarantees are off" Jerry Baumchen Quote Share this post Link to post Share on other sites Danger 0 #7 August 26, 2015 Not a Rigger, but I did video a Tandem reserve blowing up between cells 7 & 8 many years ago. The only thing holding the cells together was the binding tape on the nose and tail. Danger Quote Share this post Link to post Share on other sites Join the conversation You can post now and register later. If you have an account, sign in now to post with your account. Note: Your post will require moderator approval before it will be visible. Reply to this topic... × Pasted as rich text. Paste as plain text instead Only 75 emoji are allowed. × Your link has been automatically embedded. Display as a link instead × Your previous content has been restored. Clear editor × You cannot paste images directly. Upload or insert images from URL. Insert image from URL × Desktop Tablet Phone Submit Reply 0
gowlerk 1,910 #2 August 24, 2015 I have not. But I'm very curious about the estimated speed at the terminal opening. Were there any factors that would indicate excessive speed?Always remember the brave children who died defending your right to bear arms. Freedom is not free. Quote Share this post Link to post Share on other sites
Hooknswoop 19 #3 August 25, 2015 Raven -M's have been known to fail while within weight & speed maximums. That is why it is Precision Aero now and not Precision Aerodynamics anymore. Derek V Quote Share this post Link to post Share on other sites
masterrigger1 2 #4 August 25, 2015 Quote Any riggers out there ever see or heard about a correctly loading reserve canopy that got the middle cell blew out from a terminal opening , under 130 knots Yes, the failures were located at the point of a previous tensile test on a tandem reserve. MELSkyworks Parachute Service, LLC www.Skyworksparachuteservice.com Quote Share this post Link to post Share on other sites
riggerrob 558 #5 August 25, 2015 I saw a Raven Dash-M that tore in 3 places. The jumper was over-weight, over-speed and unstable when he scared his Cypres. How many more mistakes can you make and expect to survive? One thing that might have prevented catastrophic failure was more span-wise reinforcement tapes. SWRT are now standard on canopies designed to be loaded more than 1 pound per square foot. For example, I have one jump on a Precision RMax-118 reserve loaded "to the top edge of the chart" and it flew just fine and landed me softly. I would never buy a resrerve that small, but would seriously consider buying an RMax-150 or 170. Raven Dash-Ms also had problems with line attachment tapes failing. Precision tried to save weight/bulk by using lighter line attachment tapes. The solution was to replace wimpy Type 3 tape with Type 1 webbing. Most ram-air mains are built with Type 3 tape for line attachments and they last 2,000 or 3,000 jumps. 3/4 inch wide Type 4 tape is rated for 400 pounds. Since reserves open harder, most manufacturers use tougher Type 1 webbing rated for 500 pounds. For comparison, tandems use even stronger tapes for line attachments (e.g. 1 inch wide Type 4 tape rated for 1,000 pounds). Quote Share this post Link to post Share on other sites
Deyan 31 #6 August 25, 2015 riggerrob Most ram-air mains are built with Type 3 tape for line attachments and they last 2,000 or 3,000 jumps. 3/4 inch wide Type 3 tape is rated for 400 pounds. I guess it was a typo. Now it's fixed "My belief is that once the doctor whacks you on the butt, all guarantees are off" Jerry Baumchen Quote Share this post Link to post Share on other sites
Danger 0 #7 August 26, 2015 Not a Rigger, but I did video a Tandem reserve blowing up between cells 7 & 8 many years ago. The only thing holding the cells together was the binding tape on the nose and tail. Danger Quote Share this post Link to post Share on other sites
