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nigel99 143
QuoteThis test is done static line from an aircraft in level (horizontal) flight, at three different airspeeds, or from a cutaway main. So there is very little VERTICAL velocity at pack opening. That is how the 300 feet test can be passed. When a reserve is opened at terminal velocity, 600 feet is a more realistic number. Add 200 feet for a one second pilot chute hesitation, a common occurrence, and you have 800 feet. Not a good situation is your AAD fired at 750 feet is it? This is why I would like to see AAD's set a little higher.QuoteQuoteRob, it is 3 seconds or 300 feet not both.
Sparky
Sparky,
I am interested in the 3 seconds regardless of reserve type. At stable freefall speeds it is approximately 200 feet per second so 3 seconds = 600 feet. I would expect an exponential deceleration as the drag of the inflating reserve increases so achieving anything like 300feet in 3 seconds would seem to be a very tall order. As a result I guess that if a reserve is tested using the 3 second test method it is not likely to be opening in 300feet. Does all that make sense?
Nigel
Thanks that is very interesting.I wondered how they measured the 300 feet when it is used.
Experienced jumper - someone who has made mistakes more often than I have and lived.
QuoteThanks that is very interesting.I wondered how they measured the 300 feet when it is used.
Well, I suppose you could drop it at 300'... if it hits before its inflated... well.
"I may be a dirty pirate hooker...but I'm not about to go stand on the corner." iluvtofly
DPH -7, TDS 578, Muff 5153, SCR 14890
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DPH -7, TDS 578, Muff 5153, SCR 14890
I'm an asshole, and I approve this message
Falling.
DPH -7, TDS 578, Muff 5153, SCR 14890
I'm an asshole, and I approve this message
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