Guys -
xxx
I spend many hours teaching classroom.
I do not tech aircraft systems, except flight instruments, etc...
My subject is performance...
xxx
With new hires, we review what is what as speed definitions.
My FCTM, and my AOM is the only bible I use...
I passed my ATPL back in 1968... Was not addressed then...
All that theory is fine and dandy...
Vectoring thrust, etc...
When that stick shaker goes at some 15 degrees attitude, I just apply a procedure.
If it would even make 1 or 2 KIAS difference, would not matter.
xxx
I have a little plane (Piper L-21)...
Stall power ON is 34 KIAS, power OFF is 39 KIAS flaps down...
THAT is a definite difference. In a jet transport, it is ignored, if any.
xxx
The Vref (Vat) is 1.3 Vs... the only speed I know for landing.
In cruise, we have 1.35 or 1.4 buffet protection...
Who cares power ON or OFF... no value whatsoever.
xxx
Sorry guys, I teach since 1975 or so... and too old to change.
Happy contrails -