blair700 0 #1 June 30, 2003 OK, so in lamen's terms, why can't I get my canopy to dive as fast and as steep on these humid June days in the South...anyone else notice this...I never used to, but I guess its more pronounced at higher wing loadings etc??? What's up wit dat??? Thanks Blair Quote Share this post Link to post Share on other sites
freeflyfrog 0 #2 June 30, 2003 Here you go: Clicky! Sorry... not quite laymen's terms... but it should clear things up a bit. Also, follow the link in this article to the one on humidity... Quote Share this post Link to post Share on other sites
kaerock 1 #4 June 30, 2003 That series of articles was very interesting. Humid air is LESS dense than dry air of the same pressure and temperature...that's very counter-intuitive. That means on hot-humid days, you can expect to get a little more dive and a little more surf than usual. -R You be the king and I'll overthrow your government. --KRS-ONE Quote Share this post Link to post Share on other sites
CanuckInUSA 0 #5 June 30, 2003 QuoteThat means on hot-humid days, you can expect to get a little more dive and a little more surf than usual. That's correct. And if those conditions are zippy enough for you, why don't you come up to make a skydive in CO or NM where density altitude can be pushing 9000+ feet on a hot summer day. Try not to worry about the things you have no control over Quote Share this post Link to post Share on other sites
blair700 0 #6 June 30, 2003 Uuummm, ok, so how come it 'feels' just the opposite? Thanks Blair Quote Share this post Link to post Share on other sites
base698 14 #7 June 30, 2003 Vapor Pressure lowering. Pi = imRT I think that is why could be wrong though. Quote Share this post Link to post Share on other sites
lazyfrog 0 #8 July 3, 2003 QuoteThat series of articles was very interesting. Humid air is LESS dense than dry air of the same pressure and temperature...that's very counter-intuitive. That means on hot-humid days, you can expect to get a little more dive and a little more surf than usual. -R less density = less lift---------- Fumer tue, péter pue ------------- ourson #10, Mosquito Uno, CBT 579 Quote Share this post Link to post Share on other sites
quade 4 #9 July 3, 2003 Quoteless density = less lift That's true for the same airspeed, however, less density also means the canopy -will- be flying faster so it should swoop slightly farther until it reaches the airspeed at which it can no longer support the same amount of weight under canopy. For every 1000 foot increase in density altitude the canopy will have to fly about 2% faster and the energy in the system will be about 4% greater for an overall potentially longer swoop of about 2%.quade - The World's Most Boring Skydiver Quote Share this post Link to post Share on other sites
Spizzzarko 0 #10 July 7, 2003 I just landed my PD-126 reserve yesterday at Skydive the Rockies. The winds where calm and the DA was 9,000. I only had to step it out about 4 steps. If your looking for reserves, I would suggest a PD. That's all I have to say about that. Quote Share this post Link to post Share on other sites
John4455 0 #11 July 8, 2003 Because the molecules are more rarefied.... How do ya like it Johnny? Quote Share this post Link to post Share on other sites
