An aircraft's control effectiveness can be evaluated in flight tests by applying an exactly known moment to the aircraft. In the NAL Short Take Off and Landing (STOL) aircraft (ASKA), a method was adopted during flight tests to measure control effectiveness of a variable incidence T-tailplane with elevators, ailerons, and spoilers. Known pitching moments were applied by using crew members loaded with ballasts to move from either a forward to rear position or vice versa, whereas known rolling moments were produced by asymmetric fuel loading. Longitudinal spoiler characteristics as a result of spoiler deflections, were investigated by performing alpha sweep tests with a spoiler up-rig. This easy flight test method was used in ASKA's flight tests to evaluate control effectiveness. The flight measured control effectiveness is subsequently compared with wind tunnel test results.
Note on Flight Measured Control Effectiveness of the Quiet STOL Experimental Aircraft ASKA
1991
32 pages
Report
No indication
English
Flight Path Control for the Approach and Landing of the Quiet STOL Experimental Aircraft ASKA
SAE Technical Papers | 1994
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