GB817507A - Improvements in or relating to aircraft - Google Patents

Abstract

817,507. Gas-turbine powered aircraft. ROLLS-ROYCE Ltd. Oct. 11, 1956 [Sept. 1, 1955], No. 25200/55. Class 4. An aircraft has a power plant bay formed in an aerofoil, e.g. as wing 10, to extend forwardly from the trailing edge 16 and through the depth of the aerofoil, has a power plant installation comprising a plurality of gas turbine engines 18 mounted side by side in support structure which includes fairing and which can be installed in and removed from the bay as a unit with the engines, said faring forming a smooth continuation of the portion of the upper surface of the aerofoil forward of the bay, and has, on the under surface of the aerofoil forward of the engines, an air intake duct with a forwardly facing intake. Fig. 4 shows four gas turbine engines 18 terminating in square nozzles 19, and mounted on beams 20, of which the outer two are channel shaped, the remainder being of I-section. The beams are connected by cross beams 21 which also support the engines. Lugs on the leading ends of the beams 20 are secured to lugs on a main wing spar 12 by bolts 29. A fairing comprising a lower skin 25 and side skins 26 is secured to the beams 20. A second fairing 27, Fig. 1, covers the top of the installation and forms a smooth continuation of the wing skin 13. The air intake duct comprises a lower wall 31 forming a continuation of walls 25 and 26, and an adjustable upper wall as described in Specification 817,508. The duct is divided by partitions 33. Fire proof bulkheads 30, Fig. 4, are fitted, and auxiliaries such as oil tanks, oil pumps, fuel pumps and fuel control units are mounted forwardly of the bulkhead.