Accession Number : AD0286317

Title :   SUPPLEMENTARY LIFT FOR AIR CUSHIONED VEHICLES. VOLUME 3. PERFORMANCE ANALYSIS

Corporate Author : GRUMMAN AIRCRAFT ENGINEERING CORP BETHPAGE NY

Personal Author(s) : KIRSCHBAUM, N ; HELGESEN, J

PDF Url : AD0286317

Report Date : Jun 1962

Pagination or Media Count : 96

Abstract : The results of a wind tunnel study of supplementary lift for air cushioned vehicles were applied to vehicles for the army command reconnaissance and logistics missions. Aerodynamic off-loading of air cushioned vehicles results in an increase of power available during cruise which can be utilized to increase cruise height above the hover eight or to operate during cruise at lower power settings. With the configurations in these tests, aerodynamics off- loading was most effective at speeds of 0 mph and above, optimum speed increasing with base loading. At 20 lb/sq ft base loading (16.67 lb/sq ft wing loading) approximately 100 mph offered the lowest power re uired. Variable leading and trailing edge jet nozzles appear to be highly desirable in providing both aerodynamic off-loading for efficient cruise and an optimum hover configuration.

Descriptors :   *FLYING PLATFORMS, AERIAL RECONNAISSANCE, AERODYNAMIC CHARACTERISTICS, AERODYNAMIC CONFIGURATIONS, AIRSPEED, GROUND EFFECT MACHINES, HOVERING, LIFT, LOAD DISTRIBUTION, LOGISTICS, MILITARY OPERATIONS, NOZZLES, WIND TUNNEL MODELS

Subject Categories : Research and Experimental Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE