wing chord

A special kind of unabridged end conditions like wing is used in the interpolation of curves, it needs both radius of curvature and tangent vector perpendicular to chord line, and has been solved very successful by special processing.

其中一种比较特殊的完备边界条件是翼型条件，它要求在端点处有垂直于弦线的切线，并且具有给定的曲线半径；

The rib-strips, the apex angles, the strakes, the chord of the outer part of the wing, the shape of the keel, the slackness ratio, and the dihedral ange.

在实验中改变的因素包括伞翼后缘形状，翼面上的肋条，伞翼顶角，边条小翼，外翼弦长，龙骨形状，伞翼的张开比和上反角。

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。

angle of attack, the angle of the wing chord in relation to the free stream airflow as it moves forward through the air.

迎角，机翼翼弦在空气中向前运动时与自由气流之间的夹角。