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Aviation History
1924
1924 - 0336.PDF
ISSI MAY 29, 1924 The Rolls-Royce " Condor III." without water. Its petrol con sumption at ground level and at normal r.p.m. and b.h.p. is 18 gallons (82 litres) per hour, and the oil consumption is 0-75 gallon (3-42 litres) per hour. The Rolls-Royce " Condor," series III, is, like the smaller engines, a 12-cylinder, water- cooled Vee type. It is, however, a much larger engine, develop ing 650 h.p. at the normal speed of 1,900 r.p.m. The bore is 5 • 5 ins. (140 mm.) and the stroke 7-5 ins. (190 mm.). The weight of the " Condor III " complete, but without radiator, airscrew and water, is 1,336 lbs. (610 kgs.). The petrol consumption at normal power and speed is 45 gallons (205 litres) per hour, and the oil consumption 1 • 9 gallons (8-66 litres) per hour. All three Rolls-Royce aero engines are fitted with reduction gear for the propeller. Three views of the Rolls-Royce " Eagle IX. remembered that the great British flights of 1919—the trans-Atlantic flight, the London-Australia flight, the Cairo to Cape flight, etc., as well as the Portugal-S. America flight —were made in machines fitted with Rolls-Royce "Eagle VIII " engines. Since that time an improved version, the " Eagle IX " has been produced. This engine has been especially designed for the conditions obtaining in commercial aviation, and is considered to be an improvement upon the famous "Eagle VIII." The "Eagle IX" is a 12-cylinder water-cooled V-type, with a bore and stroke of 4-5 ins. (114 mm.)and 6-5 ins. (164 mm.) respectively. The normal power is 360 h.p., at 1,800 r.p.m., and the maximum per missible power is 398 h.p. at 2,000 r.p.m. The weight of the engine complete, but without water, is 965 lbs. (440 kgs.), and the petrol consumption at ground level and at normal b.h.p. and r.p.m. is 25 gallons (116-5 litres) per hour. The oil con sumption is 1 gallon (4 • 56 litres) per hour. A smaller engine, the " Falcon III," develops 250 h.p. at 1,800 r.p.m. and weighs 705 lbs. (320 kgs.) complete but THE SUNBEAM MOTOR CAR CO., LTD. AMONG the large number of types manufactured by th1^ firm it is only possible to give data of three, the " Dyak of 100 h.p., the " Maori " of 275 h.p.,and the 300 h.p. " Mani- tou." The " Dyak " is a vertical 6-cylinder water-cooled engine, while the other two are 12-cylinder water-cooled Vee type engines. The " Dyak " has a bore of 120 mm. and a stroke of 130 mm., and develops 110 b.h.p. at the normal speed of 1,200 r.p.m. The maximum permissible speed is 1,400 r.p.m., at which the engine develops 115 h.p. The weight of the engine .dry is 340lbs. (154 kgs.). The petrol consumption is 0-54 pint (0-31 litre) per horse-power per hour, and the oil consumption 0-02 pint (0-0114 litre) per horse-power per hour. The compression ratio is 5-45 to 1. The Sunbeam " Maori " develops 275 h.p. at a normal speed of 2,000 r.p.m., and a maximum of 280 h.p. at 2,100 r.p.m. The bore and stroke are 100 mm. and 135 mm. respectively, and the compression ratio is 5-0 to 1. The weight of the 336
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