ORIGINAL: BillS
It was hoped that someone had put the radar gun on a heavy gal to measure flap ON vs. flap OFF minimum speed to check effectiveness.
Bill
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Not a radar gun... but reading speed from these videos passes with a Senior Kadet... Flaps up, fast as possible; 70 mph, Flaps up, slow as possible; 20mph, Flaps down, slow as possible; 14 mph.