Skyrad 0 #1 December 16, 2003 Ok, so this maybe a dumb question but here goes. I've got an old F111 canopy, a Icurus Beta. ( never met anyone whos even heard of such a thing). I don't know how many jumps its got on it but my guess is somewhere in the region of 'shitloads'. Question is how can you tell when a F111 canopy is past its sell by date? (Answers such as 'All F111's are past their sell by date & 'When you bounce' are not helpful, so unless its sensible do me a favour and don't bother, cheers J)When an author is too meticulous about his style, you may presume that his mind is frivolous and his content flimsy. Lucius Annaeus Seneca Quote Share this post Link to post Share on other sites
PhillyKev 0 #2 December 16, 2003 Have a rigger with the proper equipment do a porosity test on the fabric. Quote Share this post Link to post Share on other sites
obes 0 #3 December 16, 2003 "Icurus Beta" Do you mean Icarus Beta? I have jumped my mates old Beta a few times and was very sure it was ZP... But then I have been very sure of things in the past only to be suprised... Quote Share this post Link to post Share on other sites
CornishChris 5 #4 December 17, 2003 Icarus Beta is definitely ZP as I jumped one this weekend and was after some feedback (got very litte) from other owners. Check the canopy - and if in doubt test jump it. CJP Gods don't kill people. People with Gods kill people Quote Share this post Link to post Share on other sites
Skyrad 0 #5 December 17, 2003 Doh! How stupid do I feel? Quote Share this post Link to post Share on other sites
mjosparky 4 #6 December 18, 2003 I think what you mean is permeability.My idea of a fair fight is clubbing baby seals Quote Share this post Link to post Share on other sites
beej 0 #7 December 18, 2003 Actually he means porosity... PERMEABILITY - (1) Ability of a material (generally an earth material) to transmit fluids (water) through its pores when subjected to pressure or a difference in head. Expressed in units of volume of fluid (water) per unit time per cross section area of material for a given hydraulic head; (2) description of the ease with which a fluid may move through a porous medium; abbreviation of intrinsic permeability. It is a property of the porous medium only, in contrast to hydraulic conductivity, which is a property of both the porous medium and the fluid content of the medium. www.equusinfo.org/glossary.html Porosity (n.) The quality or state of being porous; -- opposed to density. ---------------------------------------------------- If the shit fits - wear it (blues brothers)-- Quote Share this post Link to post Share on other sites
mjosparky 4 #8 December 18, 2003 No, he means permeability: "The mass rate of flow or the volume rate of flow per unit projected area of cloth for a prescribed pressure differential. In the US, permeability is measured in cubic feet of air through one square foot per minute at 1/2" of water pressure. In Great Britain, 10" of water pressure is used. Sometimes confused with porosity" Porosity: "The ratio of void or interstitial area to total area of a cloth expressed in percent. The ratio of open space to covered area of a drag surface. Used for ring slot, ribbon, ring sail, and rotafoil canopies. Not to be confused with permeability" Poynter's Parachute Manual, Vol.I, page 571.My idea of a fair fight is clubbing baby seals Quote Share this post Link to post Share on other sites
beej 0 #9 December 18, 2003 ok..im waving a white flag.. ---------------------------------------------------- If the shit fits - wear it (blues brothers)-- Quote Share this post Link to post Share on other sites
bodypilot1 0 #10 December 18, 2003 If it is ZP, and you think it's permeability is that of just an F111 canopy, it's probably too worn out, but have a rigger check it out for you. www.WestCoastWingsuits.com www.PrecisionSkydiving.com Quote Share this post Link to post Share on other sites
mjosparky 4 #11 December 18, 2003 The sweet smell of victory! Now send out all your women and beer.My idea of a fair fight is clubbing baby seals Quote Share this post Link to post Share on other sites
