Newbie 0 #1 May 13, 2003 i pull at 3000 (although i wave off at like 3100 so probably pulling at like 2800-3000 ish) Anyway my protrack constantly shows deployment altitude as like 2500, 2400 etc. Because i have maybe a second, sometimes as much as 3 max, between my wave off and PC throw, am i actually pulling at closer to 2500ft than im aware of or is the protrack reading my deployment alti lower than it actually is, OR is deployment alti on the protrack when your descent is slowed down when the bag is released and the main canopy extractedm which i imagine is probably closer to 2500? Thanks "Skydiving is a door" Happythoughts Quote Share this post Link to post Share on other sites
BenGriffiths 0 #2 May 13, 2003 The Pro-Track does have a way of knowing exactly when you dump your PC. All it read is temp & air pressure i.e. so it can tell speed and altitude. When you speed drops to below a certain level at a certain rate (don't know what this is) the system detects and assumes you have openend - so the time between throwawy and reaching this activation level is likely to explain the difference. This question has been asked before so look back a few pages or use the search option and you will probably find a more detailed axplanation.---------- Ben G Still Sinking :-( Quote Share this post Link to post Share on other sites
nacmacfeegle 0 #3 May 13, 2003 Without getting all geeky on you.... Protrack records the height at which you are in the saddle, not the height at which you toss the PC.-------------------- He who receives an idea from me, receives instruction himself without lessening mine; as he who lights his taper at mine, receives light without darkening me. Thomas Jefferson Quote Share this post Link to post Share on other sites
tombuch 0 #4 May 13, 2003 Quotei pull at 3000 (although i wave off at like 3100 so probably pulling at like 2800-3000 ish) Anyway my protrack constantly shows deployment altitude as like 2500, 2400 etc. The Pro-Trac measures speed, so it identifies opening when your speed is reduced to a specific point, or by a specific amount. If you have a chance, connect your Pro-Trac to a computer (use the Jump-Trac software) and look at the graph of speed. You will actually see your speed begin to decrease, then the program defines the opening. You can use the graph to see what altitude your speed actually began to decrease, and how much time/distance you burned through before the opening was defined.Tom Buchanan Instructor Emeritus Comm Pilot MSEL,G Author: JUMP! Skydiving Made Fun and Easy Quote Share this post Link to post Share on other sites
