When an aircraft exceeds its critical Mach number
- the nose pitches up because the CP moves Forward.
- the aircraft buffets because the CP moves to the shock wave.
- the nose pitches down because the CP moves rear.
Explanation from PART66Online
As a transonic aircraft reaches and passes its critical Mach number, shock formation moves the centre of pressure rearward. With the lift acting further aft of the centre of gravity, a nose-down pitching moment develops (tuck-under), which Mach trim is fitted to counter.
S
spot3d asked · 21 Nov 2019
why CP moves rear?
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