FLYING VEHICLE FUEL SYSTEM WITH FLIGHT REFUELLING Russian patent published in 1996 - IPC

FIELD: aeronautical engineering. SUBSTANCE: fuel system with flight refuelling has fuselage fuel service tank, wing service tank, additional wing fuel tank, jet-type level sensors showing level of fuel in both tanks, active fuel control main, boom extension and retraction electrohydraulic control cock and one-command and two-command selector switches. One-command selector switch has control and actuating chambers; two-command selector switch has control chamber and input and output actuating chambers. System is provided with controllable valve. Output of actuating chamber of one-command selector switch is connected with control chamber of two-command selector switch and control chamber of one-command selector switch is connected to refuelling pipe line. Input of actuating chamber of two-command selector switch and input of actuating chamber of one-command selector switch are connected to active fuel control main. Output of actuating chamber of two-command selector switch is connected via check valve with control is also connected with output of jet-type sensor of service tank through check valve fitted with throttle; input of jet-type sensor is connected with active fuel command main through controllable valve and its output is connected, via check valve fitted with throttle, with controllable above-piston chamber of two-command selector switch. EFFECT: enhanced reliability due to pumping wing tanks after flight refuelling. 3 dwg