Accession Number:

AD0650669

Title:

WAVE PUMPING AND ITS EFFECTS ON THE DESIGN AND OPERATION OF AIR-CUSHION SHIPS.

Descriptive Note:

Technical memo.,

Corporate Author:

NAVY MARINE ENGINEERING LAB ANNAPOLIS MD

Personal Author(s):

• Beardsley,M. W.

Report Date:

1967-03-01

Pagination or Media Count:

29.0

Abstract:

Wave pumping is defined as the variation of plenum-air volume andor pressure caused by the passage of waves through the air-cushion plenum of an air-cushion or surface-effect ship. These studies indicate that, to maintain constant deck height smooth ride when operating with adverse wave-pumping conditions, a large high-speed air-cushion ship will require a plenum-air-supply system having approximately half the power of the propulsion system. If the plenum-air-supply system does not adequately compensate for wave-pumping effects, the air-cushion ship will experience heave vibrations which may be intolerable for on-board personnel or it may descend into the water with resulting large increase in drag. Author

Descriptors:

• *GROUND EFFECT MACHINES
• FLUID DYNAMICS
• OCEAN WAVES
• AERODYNAMIC CHARACTERISTICS
• OPERATION
• VIBRATION

Subject Categories:

• Surface Effect Vehicles and Amphibious Vehicles

Distribution Statement:

APPROVED FOR PUBLIC RELEASE