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Early models were powered by a Rolls-Royce-Allison Model 250-C18 gas turbine producing a claimed 320 hp (240 kW) at 52,000 rpm. [3] Unlike some turbojet-powered motorcycles which relied on jet propulsion for thrust, the Y2K Superbike's turboshaft engine drives the rear wheel via a two-speed gearbox and chain and sprocket. The motorcycles are ...
The fit and finish was comparable to a Rolls-Royce car, and they were the most expensive road-going motorcycles in the world. Brough Superior motorcycles have always been rare and expensive. Prices for these motorcycles ranged from £100 to £185 in the 1920s and 1930s. Since the average annual salary in Britain during the 1930s was £200, only ...
The Brough Superior SS 100 is a motorcycle which was designed and built by George Brough in Nottingham, England in 1924. [1] Although every bike was designed to meet specific customer requirements—even the handlebars were individually shaped [2] —sixty-nine SS100s were produced in 1925 and at £170 (equivalent to £12,200 in 2023) were advertised by Brough as the "Rolls-Royce of Motorcycles".
The Allison Model 250, now known as the Rolls-Royce M250, (US military designations T63 and T703) is a highly successful turboshaft engine family, originally developed by the Allison Engine Company in the early 1960s. The Model 250 has been produced by Rolls-Royce since it acquired Allison in 1995.
Eton College graduate Michael McEvoy began his engineering career at the Rolls-Royce factory in Derby and started McEvoy Motorcycles in 1924. [3] The first bike from McEvoy Motorcycles was a flat twin produced in 1925 with a British Anzani 1100 cc engine. [1]
When the suction-operated inlet valves reached their limits as engine speeds increased, the manufacturers modified the designs by adding a mechanical valvetrain for the inlet valve. A few automobile manufacturers, including Willys, Rolls-Royce and Humber also made IOE engines for both cars and military vehicles.
The company was founded in 1916 as a manufacturer of aircraft engines, which it produced from 1917 to 1918 and again from 1933 to 1945 creating engines for aircraft that were used in the Second World War. The company's automobiles are marketed under the BMW, Mini and Rolls-Royce brands, and motorcycles are marketed under the BMW Motorrad brand.
George Brough considered the four-cylinder engine ideal for a motorcycle, given its smooth running and potential for greater horsepower than a single or twin-cylinder engine of the same capacity. Brough Superior had already revealed two prototype 4-cylinder machines before 1932, using an air-cooled sidevalve V-4 built in-house (1927), and an ...