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Castagna was the only Italian professional speedway rider in the history of the sport, and qualified five times for an Individual World Final. Another former rider, Giuseppe Marzotto makes the GM speedway engines. Speedway in Germany was overshadowed by its more popular track racing variant Sandbahn .
The Offenhauser Racing Engine, or Offy, is a racing engine design that dominated American open wheel racing for more than 50 years and is still popular among vintage sprint and midget car racers. [ 1 ] [ 2 ] [ 3 ]
Fred H. Offenhauser, Jr. (November 11, 1888 – August 17, 1973), was a machinist and self taught automotive engineer who developed the Offenhauser racing engine, nicknamed the "Offy", which dominated competition in the Indianapolis 500 race for decades. He also built the Novi engine, which was designed by Bud Winfield and Leo Goossen.
Latterly, JAP engines (under Villiers control) were used in motorcycle racing, and most commonly speedway or dirt track. Various enthusiasts continued development of the engine into the 1970s primarily for grass track, speedway and long track use. Variants included the use of 4 valve heads, twin spark plugs and early electronic ignition systems.
ESO was founded by a motorcycle racing driver Jaroslav Simandl, and made bikes in 250, 350, and 500 cc, primarily for speedway, moto-cross and ice racing. [1] [2] Engines were sourced from J.A.P. during the first year, and then an engine of ESO's own after 1950, first copied from J.A.P. and later of their own design. [3]
Crocker next designed and built a single-cylinder speedway racing motorcycle in 1933, according to 'The Motorcyclist' in October 1933, "An American-Made Speedway Machine." The Crocker Speedway used an overhead-valve 30.50 cubic inch/500cc engine installed in a chassis designed by Crocker, and based on the dominant racing Rudge speedway motorcycle.