Hola Wizo -
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Fine and dandy - you get your QED...
It is not in my FCTM, nor AOM...
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You can therefore assume that Vs computations/demonstrations are based in the most detrimental configuration (or power setting) when testing for FAR/JAR 25 by these flight test engineers. It certainly does not appear in any test of theory, nor flight test requirement that I practice in simulators.
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If I can land an old 747-200 at Vref 130, I know its stall speed is assumed to be 100 knots. Shall I tell my guys that they can reduce Vref by, say, 5 knots, because of this component if they carry full thrust on their engines.
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Every limitation is tested in its worse (or more detrimental) configuration... i.e. Vmca tests are done with CG at aftmost limit position. Then I assume it is power off for Vs demonstration.
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As to being too old to relearn new tricks, I am definitely. But I am not questioning the material (i.e. Boeing FCTM) which I use as reference. I am just a "manager pilot training" with an obscure airline of South America. Declare us as flying with incompetent and poorly trained pilots... Thanks!
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Happy contrails