Low Speed Aerodynamic Characteristics of an A-4 Aircraft with an Air Cushion Landing System
DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD AVIATION AND SURFACE EFFECTS DEPT
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The effect of a twin trunk air cushion landing gear system on the stability and control of an A-4 type aircraft was evaluated through an exploratory wind tunnel program. The active air cushion in ground effect conditions was found to reduce both drag and the static margin and markedly degrade the directional stability characteristics of the 22 percent scale wind tunnel model. However, the modified aircraft retains adequate longitudinal stability and both the flaps and stabilizer controls are effective and adequate for trimming the aircraft.
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