飞机地面效应及其试飞方法

扼要地综述地面效应的机理，理论研究和风洞试验技术，并分析其存在的主要问题，然后，着重评述现有两种典型地面效应试飞方法的优缺点及其实施中的技术问题。第一种方法的特点是需在试飞中实测发动机推力，其余参数由机载仪器测量，第二种方法的特点是用外部测量设备测出升力和阻力增量，但不必实测发动机推力，最后，就该课题研究提出几点看法。

Ground Effect on Aircraft and Its Flight Test Methods

The mechanism,theoretical investigation,and wind-tunnel test technique for ground effect are summarized briefly, and their primary problems that was existed are analyzed in this paper. Then, the advantage and shortcoming of two recent methods of flight test for ground effect, and the technical problems in implementation,are review emphatically. The first method is characterized by measured the engine thrust in flight test, and the remnant parameters measured by the onboard instrumentations.The second method is characterized by measured the increments of lift and drag through outside facilities of measurement, but the engine thrust didn't need to measure. Finally,the opinions towards the study of this task are put forwarded.