某纵向静稳定飞机存在跨音速勺型区现象,则该飞机在从亚音速加速至超音速过程中,飞行员操纵驾驶杆?There is a Mach tuck phenomenon for a longitudinal static stable aircraft. How should the pilot control the stick when the aircraft accelerates from subsonic to supersonic?
A.
始终推杆 Push the stick all the time.
B.
始终拉杆 Pull the stick all the time.
C.
先推杆、再拉杆、再推杆 Push, then pull, then push again.
D.
先拉杆、再推杆、再拉杆 Pull first, then push, then pull again