ANGLE OF INCIDENCE, The acute angle which the wing chord makes with the longitudinal axis of the aircraft.
安装角， 飞机的纵轴与机翼弦线所形成的锐角。
2
Roll axis - Longitudinal axis, passes through the airplane from front to rear - wing up and wing down control is by ailerons and flight spoilers.
横滚轴—又称纵轴。由飞机的前部通向后部。机翼下运动由副翼和飞行扰流板控制。
3
The middle wing is twisted back to the intersection like a motorcycle entering a curve at the highest speed with an axis pointing out to Nong Prajak park, Udonthani's important public park.