The factory owner's manual that came with my Legacy kit lists Vne of 274
knots calibrated airspeed. It defines calibrated airspeed as:
Calibrated Airspeed is the indicated speed of an airplane, corrected for
“position error” and instrument error.
So at least in reference to the
factory recommended Vne for the Legacy RG, it's based on indicated airspeed, not
true airspeed. I'm not asserting that's the "right" way or not, just
that's what's in the factory manual.
Dennis
Legacy