RECIRCULATION PRINCIPLE FOR GROUND EFFECT MACHINE MAN-CARRYING TEST VEHICLE. PRELIMINARY FLIGHT TEST RESULTS

Abstract : Results are presented of a preliminary experimental evaluation of a recirculation ground effect machine conducted by the Martin Company. The GEM vehicle tested was of rectangular planform type with base dimensions of 12 feet by 15 feet. Lift power was supplied by two AiResearch GTC 85 series bleed air jet engines. Since the vehicle was intended primarily as a hovering test bed, forward propulsion was not specifically provided. The vehicle was evaluated with respect to lift capability, static stability, and control effectiveness. Dust and spray characteristics were observed over land and water respectively.