On Simplified Analytical Flutter Clearance Procedures for Light Aircraft.

Abstract

For light aircraft, especially gliders, it is too expensive to apply the same extensive flutter analyses which are necessary for high-performance civil and military aircraft types. A specific procedure is accepted in Germany which is based on a more or less simplified ground vibration test and - depending on the test results - a statistical evaluation of flutter danger or stability calculations. Together with flight tests conducted by the manufacturer, the analytical findings constitute the conditions of flutter clearance. Experiences in applying this concept are presented in this report.