Don't most parachutes work better (create MORE drag) with a spill hole in the middle than without? Similar to the increase in drag when ventilating the pickup tailgate or the back bumper of a car? My White Gnat has one of those massive "scoop looking" rear bumpers. Dunno how easy it would be to remove, but if it's easy, a simple (but careful) A-B-A test with it on & off should show something. But instead, I intend to do the belly pan instead....
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