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0-3 cfm handling vs porosity
this is the article from 1999 http://www.hpac.ca/pub/?pid=158 abut reserve packing and porosity test
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Among Precision’s conclusions were:

After testing, the fabric had porosity increases ranging from approximately four-fold to slightly over twelve-fold compared to before testing. The fabric of newer design has generally better porosity characteristics, in that the fabric starts at lower porosity before handling, and does not degrade to as high a porosity as the fabric of older design. The porosity increases seen in these tests were representative of porosity increases seen on actual parachutes in service. The porosity increases seen on actual parachutes are due to the handling of the parachutes, mainly during the packing process. Parachutes that undergo such a porosity increase may not pass the TSO tests under which the parachute was originally certified.
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so the base canopy with 100 pack job mostly in the sun, do you noticed degradation in flare power, any body made any test on there own canopy,
Is the newer 0-3 cfm material how much better than the old any body know ?
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Re: [airdog07] 0-3 cfm handling vs porosity
In reply to:
so the base canopy with 100 pack job mostly in the sun, do you noticed degradation in flare power

My Troll has about 400 jumps on it and maybe half of the packjobs outside (sometimes in the sun as well) and I haven't noticed any loss of flare power or any loss in any other aspects of the performance as well. Even though that doesen't necessarily mean that there wouldn't be a measurable difference compared to a brand new Troll the difference probably is small enough that it still performs adequately for the job in hand. :)
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Re: [maretus] 0-3 cfm handling vs porosity
 
I had a very brief discussion with Robi about the fabric on the Trango. Eventhough it's a lighter material and it was supposed to wear out more rapidly than regular F111, he said he had put 400 jumps on his Trango, then made a porosity test of some kind to it with Stane, and it was actually less porous than a regular Troll of similar age. Which they found surprising. They suspect it has something to do with the special coating the fabric has on it. That's what I remember of the discussion, and my memory is not that great... but it was about a month ago in Switzerland, that I'm pretty sure about...

Kerkko
BASE 1184
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Re: [kege] 0-3 cfm handling vs porosity
do you know the what kind of coating on the fabric by any chance ?
thanks al
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Re: [airdog07] 0-3 cfm handling vs porosity
http://www.porcher-ind.com/espace_plus.php?rubrique=1230

thats the manufacturer of the fabric.
check product range for the different fabrics.
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Re: [mr_prick] 0-3 cfm handling vs porosity
"secret formula" that's good one,
thanks al