单选题
马赫配平在什么情况下是可用的Mach trim is available when:
A
飞机在马赫0.4以上手动飞行。The aircraft is hand flown above Mach 0.4.
B
当自动驾驶接通时。When the autopilot is engaging.
C
当安定面配平通道都断开时。When stab trim channels are disconnected.
D
当水平安定面被要求在一个高运转频率下移动。When movement of the horizontal stabilizer is required at the high rate of movement.
答案解析
正确答案:A
