重心位置对飞机阻力及其飞行性能的影响

为了降低配平状态下飞机的阻力问题，推导了飞机升致阻力与重心位置间的关系式。以一架典型的后平尾飞机为例。计算了向后移动飞机重心的位置，放宽对飞机固有静稳定度的要求对飞机配平升致阻力和总阻力以及对部分性能的影响。结果表明，当向后移动重心位置时，其配平升致阻力下降，并在某一重心位置时达最小值。

Effect of Center-of-Gravity Position on Aircraft Drag and Flight Performance

In this paper, in order to reduce the drag in trimming condition, the formula of aircraft induced drag and center of gravity is derived. According to a typical fighter of rear horizontal tail, the effect iscalculated that the center of gravity position of the fighter is moved bake ward, relax static stability on induced drag, total drag and part of flight performance. The result turns out that when center of gravity position is moved bake ward the drag is reduced in trimming condition and attain a minimum value in a certain center of gravity position. As to service aircraft, however, moving bake ward the center of gravity position only attains a little improvement on flight performance. Therefore, relaxed static stability should be considered at the beginning of program designing.