Abstract
An infinite-Froude-number, or aerodynamic, theory is developed for the prediction of the additional lift, drag, moment and flap-hinge moment acting on a planing vessel fitted with transom-stern flapsExcellent agreement between the theory and the experiment for lift, drag and flap-hinge moment is obtained for flap-chord-to-vessel-beam ratios of 0.1 and 0.2. However, the theory slightly underpredicts the experimental data for greater values of the flap chord.The predictions for the moment are much less satisfactory. It is therefore recommended to repeat the experiments using modern instrumentation.
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