akarunway 0 Report post March 10, 2004 I was always told there was no such thing as a stupid question so here goes. Out the door = you and total gear. Once you deploy your main shouldn't your wing loading be caculated - your mainI hold it true, whate'er befall; I feel it, when I sorrow most; 'Tis better to have loved and lost Than never to have loved at all. Share this post Link to post Share on other sites
TALONSKY 0 Report post March 10, 2004 Well, technically the canopy (fabric plus suspension lines) is holding the weight of it's self too so wing loading is based on your exit weight (you plus gear) Kirk Share this post Link to post Share on other sites
DeNReN 0 Report post March 10, 2004 I am not a instructor! I am a student! Your worried about a few lbs?...damn...to take a "dump" before a jump will not effect your W/L that much Share this post Link to post Share on other sites
freakydiver 0 Report post March 10, 2004 Huh - never really thought of it that way - it would only be a few pounds, but good thought... I am not smart enough to answer this question tho - come on engineers!!! -- (N.DG) "If all else fails – at least try and look under control." -- Share this post Link to post Share on other sites
SkydiveMO 0 Report post March 10, 2004 Yep! the only way you're going to subtract your main is by cutting it away. Then you can recalculate your wing loading on the reserve Share this post Link to post Share on other sites
Zoter 0 Report post March 10, 2004 hmm didnt think about that when I ordered my big reserve.....guess I'll have plenty of time to on the long slow canopy ride down on that bass ass reserve when ( and I think thats the right mentality rather than if...) I have to chop !! Share this post Link to post Share on other sites
billvon 21 Report post March 11, 2004 Your main parachute loading is equal to your exit weight divided by the square footage of the parachute. The main is included; it has to support its own weight, after all. Share this post Link to post Share on other sites
pilotdave 0 Report post March 11, 2004 It's no different than calculating the wing loading of a plane. Since most planes store their fuel in the wings, they're a very significant percentage of the weight of the plane. Wouldn't make any sense to leave them out of the calculation. Dave Share this post Link to post Share on other sites
JumpCrazy 0 Report post March 11, 2004 QuoteThe main is included; it has to support its own weight, after all. I see what you are saying about the chute carrying its own weight, however, the weight that matters in wingloading of a chute - that is the weight that affects the performance - is the suspended weight right? The suspended weight (you and rig minus main) is what affects turn rate and dive of the canopy. Sooo even though we are only talking about 6 or so pounds, I think that the effective wingloading should not technically include the main. Does this make sense?Flying Hellfish #470 Share this post Link to post Share on other sites
dubbayab 0 Report post March 11, 2004 Your worried about a few lbs?...damn...to take a "dump" before a jump will not effect your W/L that much ------------------------------------------------------------ WORD! Share this post Link to post Share on other sites
billvon 21 Report post March 11, 2004 >I see what you are saying about the chute carrying its own weight, > however, the weight that matters in wingloading of a chute - that is > the weight that affects the performance - is the suspended weight right? No. A canopy must generate enough lift to counter the entire weight of the system; there's no aerodynamic 'trick' that allows the weight of the wing to not be supported by this lift. If you doubled the weight of the canopy (say from 6 pounds to 12) the performance of the canopy would change a bit; it would be similar to what happens when you add 6 pounds of weight in a weight belt, at least in a steady glide. Share this post Link to post Share on other sites
Blahr 0 Report post March 11, 2004 Of course. Additionally, when measuring my total body weight, if I'm standing up I dont include the weight of my legs. Since they are holding me up their mass doesnt count Share this post Link to post Share on other sites
kallend 7 Report post March 11, 2004 QuoteOf course. Additionally, when measuring my total body weight, if I'm standing up I dont include the weight of my legs. Since they are holding me up their mass doesnt count So a fat-ass obese person who's sit-flying can exclude the weight of their ass?... The only sure way to survive a canopy collision is not to have one. Share this post Link to post Share on other sites
propilot 0 Report post March 12, 2004 Quote>I see what you are saying about the chute carrying its own weight, > however, the weight that matters in wingloading of a chute - that is > the weight that affects the performance - is the suspended weight right? No. A canopy must generate enough lift to counter the entire weight of the system; there's no aerodynamic 'trick' that allows the weight of the wing to not be supported by this lift. If you doubled the weight of the canopy (say from 6 pounds to 12) the performance of the canopy would change a bit; it would be similar to what happens when you add 6 pounds of weight in a weight belt, at least in a steady glide. Amen. Share this post Link to post Share on other sites Create an account or sign in to comment You need to be a member in order to leave a comment Create an account Sign up for a new account. It's free! Register a new account Sign in Already have an account? Sign in here. Sign In Now 0