Research on Free-flight Validation Test of Stall Characteristics for Commuter Category Airplanes

Abstract

It is found that the rolling characteristic after airplane stall is rapidly changed, when the wind tunnel test prediction is conducted for the small commuter category airplanes. On the basis of analyzing the wind tunnel test results of the airplane, the stalling characteristic method that the stall strips is added on the wing is adop-ted, and the flight verification is performed by using free-flight test of scaled-model. After adding stall strips on the wing and the original wing, the flight results are analyzed under the states of cruising structure and landing structure. The results show that the scaled-model free-flight test can verify the prediction results of the wind tunnel test, and the stalling characteristic improved method by adding stall strips can improve the stall characteristic of airplane.

Keywords

• scaled-model
• free-flight test
• stall characteristics
• stall strips