Forums: Skydiving: Safety and Training:
A Geometry question

 


Divalent  (C 40494)

Apr 12, 2011, 8:58 PM
Post #1 of 6 (739 views)
Shortcut
A Geometry question Can't Post

In this video (http://www.youtube.com/watch?v=APUDbXKl2_U) the person who had to do a cutaway claims (in the comments) that the main canopy was facing (and flying) backwards. He also said that he jumped that rig several times that day prior to this incident. (Things occur about about 1:30 into the video: look for the red canopy below the camera guy)

I'm trying to work out in my mind how that is possible. I.e., if on prior jumps it was fine and the risers were never disconnected and reattached, how could a pack job lead to what was claimed? Seems like a step thru (walk thru?) would just give you a 360 degree twist in both sets of risers, with the canopy still facing forward.

(BTW, you can't really see the canopy orientation in the video because it was filmed by another person from above, although it does show the full cutaway and reserved deploy. And the camera guy has a close call with the cutaway main.)


IanHarrop  (C 1152)

Apr 12, 2011, 10:14 PM
Post #2 of 6 (695 views)
Shortcut
Re: [Divalent] A Geometry question [In reply to] Can't Post

Line twists?


d123  (B 6134)

Apr 12, 2011, 10:15 PM
Post #3 of 6 (692 views)
Shortcut
Re: [Divalent] A Geometry question [In reply to] Can't Post

I think you're right. Considering that the guy had 0 linetwists then without disconeting and connecting badly the risers and then doing a shity pack job you can't fly backwardsSmile

Shitty pack job because during the packing you would see that the risers are wrongly connected.


(This post was edited by d123 on Apr 12, 2011, 10:17 PM)


mjosparky  (D 5476)

Apr 12, 2011, 10:35 PM
Post #4 of 6 (685 views)
Shortcut
Re: [Divalent] A Geometry question [In reply to] Can't Post

After watching it several times it does not look like the canopy was backwards. He is flying viewers left to right and it appears he has not released the brakes. When he cuts away the reserve is deploying from the left side of the body which put his back facing the same direction as the rear of the canopy.

Sparky


jumpsalot-2  (D 33093)

Apr 12, 2011, 11:16 PM
Post #5 of 6 (666 views)
Shortcut
Re: [mjosparky] A Geometry question [In reply to] Can't Post

mjosparky, following your insight to the line of flight from left to right, watch the jumper's head drop in the same direction, which would be typical of a normal cutaway and the reserve comes off his/her back. If the jumper was falling onto his/her back after cutaway, the reserve would have come around one side or the other and flipped the jumper around. You don't see that....I know a CRW girl who jumps a reverse set up sometimes just for fun, and lands it backwards. Don't try that at home.


mjosparky  (D 5476)

Apr 13, 2011, 1:29 AM
Post #6 of 6 (633 views)
Shortcut
Re: [jumpsalot-2] A Geometry question [In reply to] Can't Post

In reply to:
mjosparky, following your insight to the line of flight from left to right, watch the jumper's head drop in the same direction, which would be typical of a normal cutaway and the reserve comes off his/her back. If the jumper was falling onto his/her back after cutaway, the reserve would have come around one side or the other and flipped the jumper around. You don't see that....I know a CRW girl who jumps a reverse set up sometimes just for fun, and lands it backwards. Don't try that at home.

Her name wouldn't happen to be Wendy?

http://crwdog.servebeer.com/CRWdog/Backwards.html



Forums : Skydiving : Safety and Training

 


Search for (options)