HYDRAULIC CONTROL SYSTEM OF FIRE EXTINGUISHER AIRCRAFT WATER TANK HATCH FLAP DRIVE Russian patent published in 2014 - IPC B64C13/36 

FIELD: transport.

SUBSTANCE: invention relates to aircraft engineering, particularly, to hydraulic control system of fire extinguisher aircraft water tank hatch flap drive. Hydraulic control system of fire extinguisher aircraft water tank hatch flap drive comprises minimum number of three-position hydraulic control valves for control over water tank hatch flaps and flap locks, flap hydraulic cylinders with floating pistons and flap lock hydraulic cylinders. Hydraulic control system of fire extinguisher aircraft water tank hatch flap drive comp[rises shuttle valve arranged in the line feeding the working fluid into rod end of every hydraulic cylinder. One union of shuttle valve is connected via shutoff line with three-position control valve while another union is connected via common open line from common three-position control valve via throttle and common two-position control valve. Drain line of said two-position control valve connected with hydraulic system feed line via check valve. Throttle may represent a controlled component. All readjustments of hydraulic system are made in selection of flap opening conditions in flight from water drawoff to fire site.

EFFECT: expanded operating performances.

2 cl, 3 dwg