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Tracy Crook wrote:
Now for my mystery of the day. Was doing more tests on coil / alternator cooling & wingtip testing today and got around to stall tests. I was pleasantly surprised to find that my clean stall speed was down a full 5 MPH. That is HUGE, especially from such a simple mod. Repeated the test multiple times, accelerated, power on, idle, 1 mph/ 10 second deceleration, the works. The change was real. Then I tested 1/2 & full flap stall expecting that I would see the usual 4-5 mph drop in stall speed. Absolutely no difference. Stall was the same clean or dirty.
Anyone care to take a stab at this?
I was reading and article (I think it was Kelly that sent it to me) about using vertical wingtips to direct the air away from the airplane...effectively increasing the wings aspect ratio. You've been remiss in not providing us any pictures of your modifications, but if you're doing what I think you're doing, you'll be getting some of the same benefits...converting lateral flow to a higher aspect ratio vs. creating little swirlies in the air.
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This is by far the hardest lesson about freedom. It goes against
instinct, and morality, to just sit back and watch people make
mistakes. We want to help them, which means control them and their
decisions, but in doing so we actually hurt them (and ourselves)."
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