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Aviation History
1928
1928 - 0604.PDF
JULY 5, 1928 [" FLIGHT " Photogtaph THE HAWKER "HORSLEY Rolls-Royce " Condor " Engine GENERAL THE " Horsley " is a composite timber and metal machine, and is the standard day bomber of the Royal Air Force. The power unit is the Rolls-Royce " Condor," III, geared engine, and in addition to the bomb load, the machine is provided with two Vickers guns, one for the observer, and one firing forward. A prone bombing position is provided for the observer, giving an unrestricted field of vision. The " Hors- ley " possesses a remarkable degree of control and manoeuv- rability, and despite the size, can be handled with the ease of a scout machine. Fuselage.—The front portion of the fuselage is of steeltubular construction, the remainder being of timber with wire bracing. The engine mounting is a triangulated structureof steel tube and is singularly free from vibration. The equipment is very accessible, and there is sufficient accom-modation to allow the gunner to move freely from the firing to the prone bombing position. The pilot's seat is adjustableand provision has been made whereby an additional gun, firing downwards, can be quickly fitted if required. Wings.—The wings are of the two-bay type, and a modifiedGottingen section is utilised. The spars are of the box type of timber construction with steel wire bracing. Theailerons are fitted to the top planes only, and the interplane struts are of steel tubing. The centre section incorporatestwo petrol tanks of 115 gallons each (517 litres), and the design of the tanks is such as to allow the wire bracing togo straight through. Tail TJtit.—The tail unit is a composite structure of steel and timber. The rudder is of the balanced type, and the tail skid is of ash with an iron shoe, utilising rubber in compression for taking landing shocks. Engine Installation.—The " Condor " III engine is mountedin a steel structure and the cowling is quickly detachable permitting of easy inspection. The radiator is of rectangular section with A. B. tubes. A " header " tank is fitted in front of the engine and there is adequate cooling area. Undercarriage.—The undercarriage is of the split axle type and is of steel tubing throughout. The shock absorbing gear is on the oleo principle, and the design of the axles allows for the fitment of the largest size bombs. Engine Total horsepower Propeller drive Fuel capacity Position of fuel tanks Power Plant .. Rolls-Royce " Condor " III.. 690 b.h.p. Geared.. 230 gallons (1,035 litres). In top centre section. Main Dimensions Wing span (top) .. .. 59 ft. 9 in. (18-2 m.).Wing span (bottom).. .. 49 ft. 10 in. (15-15 m.) Wing chord (top) . . . . 8 ft. 6 in. (2-59 m.). Wing chord (bottom) .. 5 ft. 2 in. (1 -58 m.). Wing area 692 sq. ft. (64-4 m.*). Length, o.a 38 ft. 3 in. (11-66 m.).Height 13 ft. 8 in. (4-24 m.). Weights and Loadings Weight, empty .. .. 4,760 lbs. (2,160 kg).Service load 3,040 lbs. (1,378 kg.). Total weight, loaded .. 7,800 lbs. (3,538 kg.). Performance Speed at ground levelSpeed at 10,000 ft. (3.050 m.) Speed at 15,000 ft. (4,570 m.)Service ceiling Climb to 10,000 ft. (3,050 m.)Climb to 15,000 ft. (4,570 m.) Landing speedRange with full load 126 m.p.h. (203 km./h.).120 m.p.h. (193 km./h.). 114 m.p.h. (184 km./h.).20,000 ft. (6,100 m.). 11-75 mins.24 mins. 50 m.p.h. (80-6 km./h.).10 hours. 552
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