... trial periods: before and after the ship was fitted with flow improvement fins designed to deal with the very poor propeller inflow velocity distribution and the resulting troublesome inboard noise performance related to propeller cavitation. An important the objective of this work was to try...

... A series of model control surfaces with equal areas but varying aspect ratio, was lasted in a towing tank on a ground board. The size of the fins, approximately 3 inches span and two inches chord, is typical of control surfaces used on models which are about five feel long. Lift and drag...