Accession Number : AD0342463

Title :   FEASIBILITY OF A NOVEL ELECTRIC POWER PROPULSION SYSTEM (NEPPS) FOR A SUBMARINE. VOLUME III, HYDRODYNAMIC MODEL TESTS

Corporate Author : GENERAL DYNAMICS GROTON CT ELECTRIC BOAT DIV

Personal Author(s) : Izzo, A.J.

Report Date : 31 JUL 1963

Pagination or Media Count : 24

Abstract : This report describes the results of tests of a 1/28 scale model of a Novel Electric Power Propulsion System (NEPPS) and prediction of pro totype performance. Analysis of the test re sults leads to the following conclusions: (1) comparison of model cavitation data indicates that the cavitation performance of the NEPPS propeller is better than that of the conventional propeller; (2) torque measurements over a wide range of operating conditions indicate that propeller torque does not exceed the values originally assumed in the design of the elec trical machinery; (3) tests made at zero ad vance speed both for forward and reverse pro pulsor rotation indicates very good reverse thrust characteristics, the reverse thrust being 78% of the forward thrust; (4) the propulsive efficiency, based on the power at the blades of the model, is 90%; (5) self-propulsion was achieved at an advance ratio of 1.134; and (6) the NEPPS prototype submarine will attain a speed of approximately 24 knots. (Author)

Descriptors :   (*ELECTRIC PROPULSION, SUB), (*SUBMARINES, ELECTRIC PRO), (*HYDRODYNAMICS, SUBMARINE MODELS), FEASIBILITY STUDIES, ELECTRIC MOTORS, SUB, PRESSURE, DRAG, VELOCITY, THEORY, WIND TUNNELS, WATER TUNNELS, TORQUE.

Subject Categories : Submarine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE