xm1802 0 #1 January 31, 2005 home dz is 1200 ft a.s.l. and i will be jumping at arizona and there at about 3000 ft a.s.l. i think will it be like downsize a canopie Quote Share this post Link to post Share on other sites
SkymonkeyONE 4 #2 January 31, 2005 simple answer: yes. Quote Share this post Link to post Share on other sites
diablopilot 2 #3 January 31, 2005 Where in AZ? I think SDAZ and Coolige are only about 1500AGL---------------------------------------------- You're not as good as you think you are. Seriously. Quote Share this post Link to post Share on other sites
beezyshaw 0 #4 January 31, 2005 As Chuck says, simple answer is "yes", but if you want an explanation about it, Paul Quade has this web page... http://futurecam.com/densityAltitude.html Quote Share this post Link to post Share on other sites
propilot 0 #5 January 31, 2005 all other things being equal, your airspeed will be the same...but your groundspeed will be higher. I think thats right. yep, still think so hrmm or maybe that is just indicated airspeed when flying will be the same, but ground speed higher. ...yea i know thats right... hrmm but I wonder if true airspeed will change. hrmmmm hrmmmmmm *goes and gets airplane flying handbook* Quote Share this post Link to post Share on other sites
xm1802 0 #6 January 31, 2005 QuoteWhere in AZ? I think SDAZ and Coolige are only about 1500AGL Quote Share this post Link to post Share on other sites
xm1802 0 #7 January 31, 2005 sdaz is where im going what is the asl there Quote Share this post Link to post Share on other sites
GravityGirl 0 #8 January 31, 2005 Oh yeah! Surfs up! ~~~~~~~~~~~~~~~~~ Peace and Blue Skies! Bonnie ==>Gravity Gear! Quote Share this post Link to post Share on other sites
altichick 1 #9 January 31, 2005 SDAZ is 1513 Don't sweat the petty things... and don't pet the sweaty things! Quote Share this post Link to post Share on other sites
bmcd308 0 #10 January 31, 2005 IAS will stay the same. TAS will go up. EDITED to add: At least that's my guess. ---------------------------------- www.jumpelvis.com Quote Share this post Link to post Share on other sites
larsrulz 0 #11 January 31, 2005 Quoteall other things being equal, your airspeed will be the same...but your groundspeed will be higher. I think thats right. yep, still think so hrmm or maybe that is just indicated airspeed when flying will be the same, but ground speed higher. ...yea i know thats right... hrmm but I wonder if true airspeed will change. hrmmmm hrmmmmmm *goes and gets airplane flying handbook* Don't think of it like an airplane. Think of it like a glider. A parachute (just like a glider) needs a certain speed to produce enough lift to stay at its desired airspeed. When you decrease the air density, you will not produce as much lift (no matter what you are flying), so the airspeed must be higher to produce the lift that counteracts your weight. Isn't an issue of true airspeed or ground speed, just an issue of equilibrium speed. True airspeed, as I'm sure you know, is just indicated airspeed corrected for altitude. What we are concerned about is this desired, or equilibrium, airspeed corrected for altitude. This isn't something that can be simply inserted into an equation based on the altitude, as many other parts of canopy flight (including both coefficients of lift and drag) change with altitude as we do not fly a perfectly rigid wing....hence this is much more empirical. But basically, the original poster is correct that increasing altitude will increase landing speed for a parachute. I got a strong urge to fly, but I got no where to fly to. -PF Quote Share this post Link to post Share on other sites
LouDiamond 1 #12 January 31, 2005 A very good and true explanation, well done. I might add to that the stall speed of the canopy will be sooner than your probablly used to. Take it easy on the first few to note the changes in your canopies performance and for you to adjust to the new sensation of a faster speed."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
MakeItHappen 15 #13 February 1, 2005 Quotehome dz is 1200 ft a.s.l. and i will be jumping at arizona and there at about 3000 ft a.s.l. i think will it be like downsize a canopie Airspeed vs. Altitude Density Altitude Two pics showing natural recovery trajectories at SL and 5K density altitude at various WLs with an initial condition of 30 mph speed at an angle of 10 degrees below the horizon. Plus signs indicate seconds (eg 1 sec, 2 sec, 3 sec etc) And the speeds along the trajectories. You can definitely see that the speeds are faster at higher density altitude. .. Make It Happen Parachute History DiveMaker Quote Share this post Link to post Share on other sites
IMGR2 0 #14 February 1, 2005 QuoteWhere in AZ? I think SDAZ and Coolige are only about 1500AGL HOLY COW!! You mean to tell me the dz is hovering above the ground? Sorry JP, couldn't help myself. I know you meant MSL. Quote Share this post Link to post Share on other sites
diablopilot 2 #15 February 1, 2005 Hehehehehe I claim retardedness caused by alergies today.......---------------------------------------------- You're not as good as you think you are. Seriously. Quote Share this post Link to post Share on other sites
Beverly 1 #16 February 1, 2005 Hell Yea! We are 5000ft asl and we have to give a serious briefing to people of all experience levels if they come from a DZ from sea level or just above. We have also had many hurt ass's, ego's and a few broken bones from people who don't listen and hook it at their normal level. The ground is also very ahrd at that altitude and not very forgiving. Be very careful! I think true friendship is under-rated Twitter: @Dreamskygirlsa Quote Share this post Link to post Share on other sites
Peej 0 #17 February 1, 2005 QuoteHell Yea! We are 5000ft asl and we have to give a serious briefing to people of all experience levels if they come from a DZ from sea level or just above. We have also had many hurt ass's, ego's and a few broken bones from people who don't listen and hook it at their normal level. The ground is also very hard at that altitude and not very forgiving. Uhm, yes, now who could you possibly be talking about? Advertisio Rodriguez / Sky Quote Share this post Link to post Share on other sites
