Improvements in fuel supply systems to jet propulsion engines mounted on the wings of rotating wing aircraft

摘要

732,918. Jet propulsion plant. DOWTY EQUIPMENT, Ltd. June 3, 1953 [June 3, 1952], No. 14000/52. Class 110 (3). In a fuel-supply system for the burners of jet propulsion engines mounted at the tips of the wings of rotating-wing aircraft in which fuel is fed to the burners from a pump through a rotating joint and along fuel conduits mounted in the wings, each feed conduit has, at the end adjacent the wing tips, a pressure-reducing valve which is loaded in the closing direction by a mass the force on which varies with the centrifugal force due to the rotating wing. The fuel to ram jet units mounted at the end of'the wings of a rotating-wing aircraft is supplied by a pump through a control valve, a rotating joint and feed conduits 22 arranged parallel to the leading edge of the wing. To avoid, variations in the fuel pressure due to variations in speed of rotation of the rotating wing, pressure-reducing valves 23 are arranged in the conduits 22 at the wing tips. The conduits 22 are bent back on themselves to provide valve seatings 24 with which valve closure members 25 co-operate. The valve closure, members each comprise a half ball member 25 engaged by a: spherical mass 26 which is guided in a cylinder 27. A light spring 28 is provided to keep the conduit 22 upstream of the valve primed. The centrifugal force on the mass 26 opposes the increase in fuel pressure also due to centrifugal force so that the pressure downstream of the valve will be substantially the same as that of the pump delivery. If desired, the mass 26 may act on the member 25 through a lever system. Instead of using a rigid mass a column of liquid of the same density and length as the column of fuel in the conduit 22 may be employed.