pilotdave 0 #1 October 16, 2004 I attached a typical RW jump profile of mine from my neptune (through paralog). I'm trying to understand the behavior around pull time. Pretty much every graph has that same sort of shape. But I don't believe the numbers. Minimum speed in the track was 82 mph, but it suddenly spikes to the highest fallrate of the jump, 125, just before pull time. Doesn't make sense to me. I'm thinking it's maybe something going on with the air pressure inside my helmet when I'm pulled upright. Anyone have a clue? Dave Quote Share this post Link to post Share on other sites
kelpdiver 2 #2 October 16, 2004 Flat track is supposed to slow descent rate, which was seen. Then you exit the foward motion, vertical increased again. Why is it faster than the main jump? Were you attached to others, or flying flat and slow? And was it really 15 seconds from deploy to full canopy flight? Quote Share this post Link to post Share on other sites
thelem 0 #3 October 16, 2004 The way I'm reading that you pulled at 3.8 and didn't have a canopy until below 2 - that can't be right surely? How about wearing it on your wrist for a jump and see if it reads differently? Quote Share this post Link to post Share on other sites
LouDiamond 1 #4 October 16, 2004 If it's inside your helmet it is more than likely reading off on all of your jumps since a simple turn of your head can influence the readout. Try hand mounting it and they spikes will go away."It's just skydiving..additional drama is not required" Some people dream about flying, I live my dream SKYMONKEY PUBLISHING Quote Share this post Link to post Share on other sites
KCJumper 0 #5 October 16, 2004 I took a moment and looked at my profiles. They look nothing like yours do. Mine show me under canopy in around 3 seconds. And my speed doesn't spike like that. I do wear mine on my wrist so i'm not sure how that affects the outcome. Patrick Quote Share this post Link to post Share on other sites
pilotdave 0 #6 October 16, 2004 Actual pull was around 3000 or maybe a little lower on that jump. I'll try it on my wrist sometime and see what happens. I wouldn't expect the air pressure inside a helmet to vary so much.... On the wrist, it seems to me that an altimeter is exposed to much greater fluctuations since the airflow around it will change with every hand movement. Being inside a z1 helmet with little airflow, I'd expect pressure to remain closer to static pressure. But I guess not! Dave Quote Share this post Link to post Share on other sites
