MOTIONS OF A FLOAT-SUPPORTED AIRCRAFT IN A SEAWAY.
HYDRONAUTICS INC LAUREL MD
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An experimental investigation of three vertical float configurations was carried out and the results compared with theoretical predictions of the motions. The models considered correspond to The A2 aircraft configuration considered by Wong in head seas the A2 configuration in beam seas and a configuration identical with the A2 configuration in beam seas but having tapered or flared floats. It was thus possible to compare the response for three configurations each having significantly different responses. Calculations of the heave, pitch roll and surge sway response were made using the non-linear methods developed by Barr and Martin. The measured heave and surge response are found to be in fairly good agreement with the theoretical predictions. The measured and predicted pitch roll responses are not in good agreement, although fair agreement was obtained for head seas by a modification of the estimated plate drag coefficient. For both roll and heave, the measured response was greater with tapered than with cylindrical floats. Further experimental investigation of float and damping plate forces and non-linear effects are needed to obtain improved predictions of response, particularly for pitch roll. Author
- Fluid Mechanics