GB468719A - Improvements in or relating to aircraft - Google Patents

Abstract

468,719. Disposition of radiators on aircraft. RABATEL, H. A. March 2, 1936, No. 6318. Convention date, March 1, 1935. [Class 4] In aircraft comprising an aircooled radiator disposed behind the engine and enclosed together with the engine by a streamline casing, cooling air is supplied to the radiator through conduits opening into the forward nose of the casing, streams through a chamber, for example, of annular section which is constricted in the form of a nozzle and arranged behind the radiator and finally issues out through a series of apertures or an annular gap disposed in a zone of reduced pressure. As applied to an aeroplane comprising a fuselage 1, Fig. 2, and a liquid cooled engine 2, a radiator 3 is disposed near the place of maximum crosssection. A number of conduits 4 have inlet openings 5 in a zone of high pressure, the openings having an area small relative to that of the radiator. As shown, the engine cylinders are arranged in a Vee and. the conduits run one between the cylinders, one on either side of the crank-case and a fourth beneath the crankcase, Fig. 3. The conduits are shaped to conform with the rotation of the airscrew slipstream and are flared at their rear ends in such manner that the area of the outlet openings corresponds with that of the radiators. An opening may be formed in the nose for entry of air into the engine compartment. Where a spinner such as 7 is employed, this opening may be an annular or part annular gap 8 between spinner and cowling. Alternatively, gap 8 may substitute openings 5. The engine may have cooling fins 9 and the finned parts may constitute one wall of a conduit 4. A partition 10 which may serve as a fire-proof bulkhead is shaped line a ship's stem or given a bell-shape as shown and deflects the outlet air toward outlet holes 11, an annular gap, or slots formed in a part of the fuselage disposed in a zone of reduced pressure. The nose of partition 10 may project through the radiator and give passage to control transmission gear. The engine radiator group may form a detachable assembly and more than one radiator may be employed.