STUDY OF LOADS AND MOTIONS OF TWO TYPES OF GROUND EFFECT MACHINES
GENERAL DYNAMICS/CONVAIR HUNTSVILLE AL
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Results are presented for dynamically similar experimental model evaluations of the over water loads and motions of two ground effect machine configurations. Two basic configurations were tested 1 The DTMB Annular Jet Configurations and 2 the Bureau of Ships Side Skeg Configurations. The program consisted primarily of determining the heaving and pitching motions incurred during normal operation in smooth water and in various regular wave conditions. Also, the rigid body load factors resulting from sudden power failure during maximum cruising condition in waves were determined. It is concluded that GEM vehicles operating over waves are subject to critical heaving and pitching motions and accelerations. These motions and accelerations are of paramount importance to the feasibility of the GEM concept during over-water operation. The results indicate that much can be done to minimize the motions and loads of these vehicles. Data were gained for the judicious selection of optimum design parameters. The tests also indicated some of the major problem areas which will require further investigation to insure the safety, structural integrity, and comfort of GEM vehicles operating over waves.
- Research and Experimental Aircraft