通用航空飞机的三翼面布局研究

本文对国外通用航空中三翼面布局飞机的研究概况作了简要叙述，并归纳了正常式、鸭式和三翼面布局相互对比的理论研究和实验研究状况。根据Ｐ－Ｍ理论，计算了五种三翼面飞机和试验模型的诱导阻力因子、升阻比以及翼面升力比等。通过计算分析，发现大前翼小间距的第一类三翼面布局和小前翼大间距的第二类三翼面布局的气动特性有明显的差别，且前翼与机翼间的水平间距对诱导阻力因子和升阻比的影响较大。

A Study of the Three-Surface Aircraft Configuration in General Aviation

The general situation was narrated briefly for the development of the threesurface aircraft configurations in general aviation. From the comparison of the theoretical and experimental studies, the present situation is summed up as the conventional, the canard,and the three-surface configurations. On the basis of P-M theory, the calculations are made for the induced drag factor, the ratio of lift to drag, and the ratio of lift in surfaces on five kinds of three-surface planes and test models. By means of computation and analysis, distinct difference is found in aerodynamic characteristics for first kind and second kind three-surface configurations: the first kind found to be bigger front surface with shorter distance to wing; the second kind, smaller front surface with longer distance to wing. The influence of level distance from front surface to wing on the induced drag factor and the ratio of lift to drag is fairly large.