An investigation was conducted at the David W. Taylor Naval Ship Research and Development Center Carriage III Facility to determine performance characteristics of a power-augmented-ram wing-in-ground-effect vehicle. The model was the first statically stable vehicle to be operated free in heave and pitch with excess thrust. The power-augmented-ram vehicle successfully accomplished a static takeoff at the extremely low thrust-to-weight ratio of 0.173. The model was able to accelerate through hump at a vehicle density of 2 lb/cu ft (32 kg/cu m); this is a higher density than in any previous test. Trimming moments were supplied by one of several aerodynamic/hydrodynamic control surfaces. The best performance was obtained using a large 40-deg deadrise, 'V' shaped, planing tail. (Author)
Evaluation of a Power-Augmented-Ram Wing Operating Free in Heave and Pitch over Water
1977
78 pages
Report
Keine Angabe
Englisch
Aerodynamics , Aircraft , Marine Engineering , Surface effect vehicles , Surface effect ships , Wings , Ground effect machines , Hydrodynamic control surfaces , Aerodynamic control surfaces , Aerodynamic configurations , Thrust , Takeoff , Performance(Engineering) , Power , Augmentation , Ram wing surface effect vehicles , Wing-in-ground effect , Power augmented ram wings , Sea Wig model
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