Rolls-Royce Buzzard / H Srs
The Rolls-Royce Buzzard (also referred to as the H engine) was a British piston aero engine of 36.7 litres (2,240 cubic inch) capacity that produced about 800 horsepower (600 kW). The Buzzard was developed by scaling-up the Kestrel engine in the ratio of 5:6. Designed and built by Rolls-Royce Limited it featured 12 cylinders in a 'V' configuration of 6 inch bore and 6.6 inch stroke, and the engine was supplied as standard with a medium supercharger capable of being used to its fullest extent on the ground, so as to give the maximum possible take-off power, first run in June 1928.
The Series I, II and III engines had reduction gear ratios of 0.632, 0.553 and 0.477 respectively, and the normal power was 825 h.p. at 2,000 r.p.m. at sea level. At 2,300 r.p.m., 955 h.p. was available at sea level. The dry weight was 1,540 lb.
Buzzards were installed in the Blackburn Iris V and VI (Perth), MA/30 and MA/30A, Handley Page H.P.46 (MA/30), Hawker Horsley, Short Singapore I, K.F.I and Sarafand, and Vickers M.1/30.
The total production of Buzzard engines 100.
It was manufactured in the late 1920s, but only 100 were sold. A further development was the Rolls-Royce R Schneider Trophy engine.
Buzzard IIMS, (H.XIIMS)
Buzzard IIIMS, (H.XIVMS)