螺旋桨有四个桨叶。 ()
A、The helm has four blades.
B、The propeller has forty blades.
C、The windlass has four blades.
D、The propeller has four blades.
A、The helm has four blades.
B、The propeller has forty blades.
C、The windlass has four blades.
D、The propeller has four blades.
A、必须确保飞行器电池插头拔出的情况下,才能对螺旋桨进行操作 B、每次飞行前必须检查螺旋桨是否安装正确和紧固,桨叶是否展开 C、只要桨叶没有断裂即可无需更换 D、应定时更换螺旋桨垫片,保证飞行性能