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1939 Haythorn 500cc Four

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Haythorn 500cc Four 1939

Esta moto de construcción artesanal tenía un motor de cuatro cilindros con árbol de levas a la cabeza, refrigerado por aceite, y una novedosa transmisión de dos velocidades utilizando dos transmisiones diferentes por cadena a la rueda trasera. Este ejemplar, en el museo de Sammy Miller, es la segunda de las dos motocicletas hechas por John Haythorn, un ingeniero automotriz escocés que trabajaba para un fabricante de sobrealimentadores. Su desarrollo finalizó cuando fue trasladado para apoyar el esfuerzo de guerra en 1940, pero ya era una máquina utilizable que había sido presentada a la prensa del motociclismo.

A handcrafted motorcycle which has an oil-cooled OHC four-cylinder engine with a novel two-speed transmission using two different transmissions per chain to the rear wheel. The second of only two built is on exhibition at the Sammy Miller Museum. It was constructed by John Haythorn, a Scottish automotive engineer who worked for a supercharger manufacturer. Its development ended when he was transferred to support the war effort in 1940, but it was already a usable machine that had been presented to the motorcycling press.

Haythorn also built the engine for the Sackville

Source: Sergio Scalerandi

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