AIR-CUSHION VEHICLE AND ITS FLEXIBLE GUARD Russian patent published in 2005 - IPC

FIELD: hovercraft.

SUBSTANCE: proposed air-cushion vehicle has hull, air-cushion guard with air duct arranged along perimeter of hull, power plant containing at least one engine connected by transmission with at least one air propulsor to create thrust and at least two blowers to build air cushion. Air-cushion guard air duct arranged along perimeter of hull is divided into two isolated spaces, each being connected with corresponding blower and pneumatically coupled with conical flexible material members made flattened and contacting along flat side surfaces. Each conical member is furnished with two perforated diaphragms arranged side its space and closing higher than lower edges of conical member. One of said diaphragms extends from lower outer and other, from lower inner edges of conical member. Ratio of area of through holes in diaphragm secured over line of connection of guard with bottom of hull and over line of connection of guard with conical members to area of through holes in diaphragm is within 0.8 and 1.0. Flexible mouth lock is secured in joint of diaphragms of conical member. Said mouth lock is made for complete closing of holes made in upper part of diaphragm in deflected position. Area of holes in upper part of diaphragm is 8-12 times greater than area of holes in lower part of diaphragm.

EFFECT: provision of pitching and rolling stability, prevention of self-oscillations, increased service life of guard of air-cushion vehicle.

12 cl, 10 dwg