Vertical axis of an aircraft is an imaginary line passing vertically through the center of gravity of an aircraft. The vertical axis is called the Z- axis, or the yaw axis( )
A.Vertical axis passes horizontally through the center of gravity of an aircraft. B.Vertical axis passes vertically through the center of gravity of an aircraft. C.Vertical axis of an aircraft is an imaginary line passing vertically through the center of gravity of an aircraft. The vertical axis is called the pitch axis.正确答案B
