quade 4 #26 July 17, 2003 Well, maybe, but then they're just not thinking it through. I also outlined a couple of other things to consider in another thread, or maybe this one, there are so many now and I'm getting way confused. That and I was in to work at 3:30 this morning for some stupid TV station in LAS -- my brain is fried. I'm going home.quade - The World's Most Boring Skydiver Quote Share this post Link to post Share on other sites
andy2 0 #27 July 17, 2003 [QUOTE]Monarch like that. Not one known to smack anyway.[/QUOTE] Im waiting until I have a canopy that opens SOFT to start messing around with this, good advice. Right now its probably best to just keep focusing on a nice symetrical arch come deployment time... --------------------------------------------- let my inspiration flow, in token rhyme suggesting rhythm... Quote Share this post Link to post Share on other sites
towerrat 0 #28 July 17, 2003 Quote the second you drop your hands lower than your shoulders, your head and shoulders will drop slightly, so your body is not horizontal with the durface of the earth, you are travelling slightly "head and shoulders down" ***what about the mantiss position. I have seen many flyers with their hand at, if not slightly below shoulder level.Play stupid games, win stupid prizes! Quote Share this post Link to post Share on other sites crazy 0 #29 July 18, 2003 QuoteWhen you deploy in any sort of track, your canopy opens somewhat behind you. That means you rotate more than the standard 90 degrees. That makes somewhat hard openings much harder; your body is torqued a lot more while the canopy is opening. How do you jump from "rotate more then 90 degrees" to "somewhat hard openings much harder"? I agree that if the human body was rigid, there would probably be a higher angular velocity. However, considering the fact that the human body is flexible, the "more than 90 degrees" implies that the body will flex more, which is likely to reduce the angular velocity, and improve the absorption of the opening shock. In addition, I'm wondering if the effect of a hard opening is significant while the body flips over. Besides, opening in track doesn't necessarily mean that your body is pitched 25 degrees head down with a trajectory 45 degrees away from the vertical. The human body has a limited capacity to flatten out from a track or from a dive (the vertical speed can decrease lower than 65mph according to the pro-track). Increasing the angle of attack will not reduce the lift so much (might even increase a little bit) but it will increase the drag quite a lot for a short while. Properly synchronized with the opening sequence, this can give damn soft and slow openings.-- Come Skydive Asia Quote Share this post Link to post Share on other sites billvon 2,998 #30 July 18, 2003 >However, considering the fact that the human body is flexible, > the "more than 90 degrees" implies that the body will flex more . . . That is exactly right! And if your neck is bent at 90 degrees during that rapid angular acceleration, you will feel pain, and will interpret that as a hard opening. Most people call "hard openings" ones that hurt them, not neccessarily ones that exceed a certain G-limit. In addition, that will first load (as you begin the angular acceleration) then unload (as you rotate) then load (as you stop rotating) the lines of the canopy. Canopies are not designed to open with widely varying loads on them. Quote Share this post Link to post Share on other sites alain 0 #31 July 18, 2003 I have the exact oposite exerience on my safire (@ 1,35:1) . 400 jumps on it, basicaly the last 150 or so pulling in a flat and fast track: I've never had any hard or painfull opening, no twist, just a 90° of heading once in a while. I think I break my knees at the same time I pull. The idea beyond this being to take advantage of the last 2 seconds to go farther... I waited jump # 300 before starting this progressively and I'm not exerienced enough to recomend anything to anyone... just sharing Alain Quote Share this post Link to post Share on other sites flyboy6554 3 #32 July 20, 2003 I got in a bad habit of opening in a "slight" track after separating from other jumpers during relative work (OK...formation skydiving) I just got lazy and wasn't slowing down completely before pulling. finally got "whacked" on an opening one day that just about knocked me into oblivion! Felt like someone had hit me in the back with a baseball bat as hard as they could. Had a couple of other similar openings, reviewed packing, stow bands, etc until I figured out the problem. Now, after i track off and clear the air, wave-off etc., I DE-ARCH and slow down for a second or two...this technique gives me the softest, sweetest openings imagineable. Important for a guy with 2000 jumps and a 49-year old back. Good luck! Quote Share this post Link to post Share on other sites Prev 1 2 Next Page 2 of 2 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
crazy 0 #29 July 18, 2003 QuoteWhen you deploy in any sort of track, your canopy opens somewhat behind you. That means you rotate more than the standard 90 degrees. That makes somewhat hard openings much harder; your body is torqued a lot more while the canopy is opening. How do you jump from "rotate more then 90 degrees" to "somewhat hard openings much harder"? I agree that if the human body was rigid, there would probably be a higher angular velocity. However, considering the fact that the human body is flexible, the "more than 90 degrees" implies that the body will flex more, which is likely to reduce the angular velocity, and improve the absorption of the opening shock. In addition, I'm wondering if the effect of a hard opening is significant while the body flips over. Besides, opening in track doesn't necessarily mean that your body is pitched 25 degrees head down with a trajectory 45 degrees away from the vertical. The human body has a limited capacity to flatten out from a track or from a dive (the vertical speed can decrease lower than 65mph according to the pro-track). Increasing the angle of attack will not reduce the lift so much (might even increase a little bit) but it will increase the drag quite a lot for a short while. Properly synchronized with the opening sequence, this can give damn soft and slow openings.-- Come Skydive Asia Quote Share this post Link to post Share on other sites
billvon 2,998 #30 July 18, 2003 >However, considering the fact that the human body is flexible, > the "more than 90 degrees" implies that the body will flex more . . . That is exactly right! And if your neck is bent at 90 degrees during that rapid angular acceleration, you will feel pain, and will interpret that as a hard opening. Most people call "hard openings" ones that hurt them, not neccessarily ones that exceed a certain G-limit. In addition, that will first load (as you begin the angular acceleration) then unload (as you rotate) then load (as you stop rotating) the lines of the canopy. Canopies are not designed to open with widely varying loads on them. Quote Share this post Link to post Share on other sites
alain 0 #31 July 18, 2003 I have the exact oposite exerience on my safire (@ 1,35:1) . 400 jumps on it, basicaly the last 150 or so pulling in a flat and fast track: I've never had any hard or painfull opening, no twist, just a 90° of heading once in a while. I think I break my knees at the same time I pull. The idea beyond this being to take advantage of the last 2 seconds to go farther... I waited jump # 300 before starting this progressively and I'm not exerienced enough to recomend anything to anyone... just sharing Alain Quote Share this post Link to post Share on other sites
flyboy6554 3 #32 July 20, 2003 I got in a bad habit of opening in a "slight" track after separating from other jumpers during relative work (OK...formation skydiving) I just got lazy and wasn't slowing down completely before pulling. finally got "whacked" on an opening one day that just about knocked me into oblivion! Felt like someone had hit me in the back with a baseball bat as hard as they could. Had a couple of other similar openings, reviewed packing, stow bands, etc until I figured out the problem. Now, after i track off and clear the air, wave-off etc., I DE-ARCH and slow down for a second or two...this technique gives me the softest, sweetest openings imagineable. Important for a guy with 2000 jumps and a 49-year old back. Good luck! Quote Share this post Link to post Share on other sites
