Accession Number : ADD012568

Title :   Non-Soniferous Power Drive for Underwater Vehicles.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : DeMarco,Michael

Report Date : 02 Sep 1986

Pagination or Media Count : 12

Abstract : The system provides propulsion of torpedoes without need for noise producing gears or internal combustion engines. Variable speed of two impellers is automatically controlled from a single hydraulic piston regardless of depth, as is the horizontal and vertical attitude. Upright stability of the vehicle is held by controlling the speed of one impeller versus the other and also by using a single hydraulic piston. Since the speed controlling element allows output speed adjustments from zero to maximum, efficiency of the battery powered prime mover is high. The motor is allowed to come up to full high operational speed under no load conditions (zero output speed) developing vast amounts of kinetic energy through centrifugally forced contact rollers. This energy becomes available for the supply of peak power without taxing the prime mover, while continuing to reestablish the spent kinetic energy during periods of low power output. The system is suitable for using digital control inputs that can feasibly be supplied by radio control through an antenna external to the system.

Descriptors :   *PATENTS, *HYDRAULIC POWER, *VARIABLE SPEED DRIVES, *ELECTRIC MOTORS, DIRECT CURRENT, UNDERWATER PROPULSION, QUIET TORPEDOES, TORPEDO MOTORS, ATTITUDE CONTROL SYSTEMS, ELECTRIC BATTERIES, TURNING(MANEUVERING), LEVEL FLIGHT, IMPELLERS, COUNTERROTATION, CONTROL SYSTEMS, KINETIC ENERGY, ROLLERS, DIGITAL SYSTEMS, REMOTE CONTROL

Subject Categories : Hydraulic and Pneumatic Equipment
      Torpedoes
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE