"BTIZ" wrote in message
news:yN_Ue.14282$ct5.10523@fed1read04...
snip
Vne is based on IAS, TAS for the same IAS is higher at higher altitudes.
But
remember, it's not just airspeed, or airspeed indicator errors associated
with altitude changes, but also other dynamic "q" factors on the airframe
at
higher "effective" airspeeds.

Thank you for the informative reply. Please define "q"