In order to develop a rational model for ship maneuvering, a series of model tests was conducted to isolate forces on the hull, propeller and rudder, and to study the interactions between them. Rotating arm and linear towing tests were conducted on a large Mariner model, and a systematic series of smaller models. The large model Mariner tests were conducted by David Taylor Research Center (DTRC) at one speed, and at various drift angles and yaw rates. In order to study hydrodynamic forces on each component and their interactions, the same tests were repeated for the bare hull, the hull with rudder, and for the hull with rudder and operating propeller. Two types of rudders were used for these tests. One was an airfoil-shaped rudder whose stock passed through the hull without contact. This was fitted with four multi-hole pitot tubes to measure inflow velocity and direction at different spanwise locations on the rudder's leading edge. The other rudder, a flat plate "flag".

This content is only available via PDF.
You can access this article if you purchase or spend a download.