COMPARISON OF THREE THEORIES OF WATER-JET PROPULSION

The three different approaches to derivation of formulae expressing the relations among speed, thrust, power, and efficiency of water-jet propulsion systems, as developed by Lockheed California Company; Virgil Johnson of Hydronautics, Incorporated; and Joseph Levy of Aerojet-General Corporation, are summarized and compared. Certain modifications and simplifications are incorporated, and terminology is modified as necessary to facilitate comparison. The Lockheed system, which provides a method for including the weight and drag of the propulsion system in the optimization procedure, appears to be the more useful. The problems of compromising the performance of the propulsion system at cruising speed in order to provide reasonable hump performance are briefly discussed. ( Author )

• Corporate Authors:

  Navy Marine Engineering Laboratory

  Annapolis, MD  United States 
• Authors:
  • Garrett, John H
• Publication Date: 1967-2

Media Info

• Pagination: 52 p.

Subject/Index Terms

• TRT Terms: Hump yards; Propulsion; Vehicle power plants; Waterjet propelled craft
• Uncontrolled Terms: Propulsion systems
• Old TRIS Terms: Drag hump; Waterjet propulsion
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00001981
• Record Type: Publication
• Source Agency: Defense Documentation Center
• Report/Paper Numbers: MEL-TM-484/66 Tech Memo
• Files: TRIS
• Created Date: Oct 30 1970 12:00AM