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Fly_Unity · June 13th, 2007, 11:19

I have looked for my old copy of 23.149 (pre 1980) I had and couldnt find it, nevertheless Airplane flying handbook says that the the early FAR 23, AND CAR 3 didnt specify weight for VMC, and that all V-speeds are based on gross weights unless otherwise specified in the POH.

Who knows though what piper actually did though. So your saying that they just did it because it was a common practice?

<<<The flight testing literature is clear that they test Vmc at light weights because Vmc is higher, not because they need a light weight to climb to altitude>>>

I agree that they tested it lighter, not because of performance, but because it will NOT VMC at gross weight at their altitude. The question isnt what they tested it at, but what weight, was the caculated 55 knot VMC speed based on.

June 13th, 2007, 11:19	#32
Fly_Unity Senior Member Join Date: Jul 2006 Posts: 306	Re: acronym for Vmc factors I have looked for my old copy of 23.149 (pre 1980) I had and couldnt find it, nevertheless Airplane flying handbook says that the the early FAR 23, AND CAR 3 didnt specify weight for VMC, and that all V-speeds are based on gross weights unless otherwise specified in the POH. Who knows though what piper actually did though. So your saying that they just did it because it was a common practice? <<<The flight testing literature is clear that they test Vmc at light weights because Vmc is higher, not because they need a light weight to climb to altitude>>> I agree that they tested it lighter, not because of performance, but because it will NOT VMC at gross weight at their altitude. The question isnt what they tested it at, but what weight, was the caculated 55 knot VMC speed based on.