gus 1 #1 December 1, 2003 For any canopy design and size the manufacturers must know how much fabric they need, how much stitching is required and the total length of line used. Isn't this enough to calculate the volume of material used to manufacture the canopy? It wouldn't give you the typical volume of a packed canopy (you'd never squeeze all the air out) but would it give you an accurate means of comparing the volume of 2 canopies? GusOutpatientsOnline.com Quote Share this post Link to post Share on other sites
NightJumper 0 #2 December 1, 2003 QuoteIsn't this enough to calculate the volume of material used to manufacture the canopy? Actually the way that we measure finished canopy volume is to place the canopy in a cylinder and measure the actual volume. Quote Share this post Link to post Share on other sites
mjosparky 3 #3 December 1, 2003 QuoteQuoteIsn't this enough to calculate the volume of material used to manufacture the canopy? Actually the way that we measure finished canopy volume is to place the canopy in a cylinder and measure the actual volume. And that volume can vary from day to day and from canopy to canopy of the same type. SparkyMy idea of a fair fight is clubbing baby seals Quote Share this post Link to post Share on other sites
darkwing 4 #4 December 2, 2003 My answer is "No". The volume of a canopy depends on more factors than that, as implied by the way it is actually measured (as mentioned above). Different rolls of the "same" fabric can pack differently. Minor tension differences, or seams sewn by different people can result in volume changes. While you could get an answer using your method, it wouldn't be as good as actually measuring it. One thing that most jumpers don't have a grasp of is how much a canopy can deviate from the stated pack volume. This can be due to humidity, packing method, number of jumps on the canopy, and other factors. -- Jeff My Skydiving History Quote Share this post Link to post Share on other sites
fstz28 0 #5 December 3, 2003 where can one look to see the different effects that humitdity, dz altitude from state to state, and such have on canopies. Quote Share this post Link to post Share on other sites