HYDRODYNAMICS AND STABILITY AND CONTROL OF A TANDEM PROPELLER SUBMARINE
Abstract
Hydrodynamic and stability and control characteristics are investigated for a novel submarine configuration employing tandem, large hub- to-diameter ratio propellers whose blades can be pitched collectively and cyclicly. The propulsion and lateral control forces which can be produced by the propellers at very low forward speeds (including zero) are defined by means of simple blade-element theory that includes, however, the effects of propeller- induced, axial inflow velocity. The resulting analysis is used to study the problem of trimming the submarine at hovering speeds. The analysis indicates that the TPS can be stabilized and controlled at high speeds. Maneuvering performance in the pitchplane is equivalent to that of a conventional submarine except that a higher percentage of the total available control effectiveness must be used in diving maneuvers. The minimum turning radius of the TPS, when operating at high speeds, is approximately five times that of a conventional submarine. At lower speeds, the turning performance of the TPS becomes superior to that of the conventional submarine.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1962
- Accession Number
- AD0284659
Entities
People
- D. C. Clark
- F. Dell'amico
Organizations
- Calspan