Stabilization and motion alleviation of air cushion borne vehicl

Details Stabilization and motion alleviation of air cushion borne vehicl Stabilization and motion alleviation of air cushion borne vehicl

1976-03-23

1977-06-14

Kunin, Stephen G.

Ships

Building

Antifriction surfaces

180121, B63B 134

Patent

active

040290360

ABSTRACT:
An automatic pitch stabilization and motion alleviation device for air cushion borne vehicles, equally applicable to fully-skirted and to rigid sidewall vehicles. The vehicle's air cushion plenum is divided into bow and stern compartments by a transverse seal. Vehicle lift fans and a unique ducting arrangement supply air flow to the air cushion compartments and seal system. A valve, in a portion of the duct feeding air to the forward compartment, regulates the pressure drop from the stern compartment to the forward compartment. The valve is capable of providing 30-100% higher mean pressure in the aft compartment relative to the forward compartment. The valve is actuated automatically by height, motion, rate, acceleration, and pressure sensors, the outputs of which are fed to the valve servomechanisms to provide effective underway dynamic control of the pressure differential between compartments for motion stabilization in pitch and for improvements of ride quality.

REFERENCES:
patent: 3297102 (1967-01-01), Cockerell
patent: 3742888 (1973-07-01), Crowley
patent: 3850126 (1974-11-01), Leonard

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