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jaja, llama la atención, aparte de los honda rfvc y el triflux hay algun otro invento como este?
Mucho antes empezo lo de la Valvula Radial
Mike Kron, from Krautheim, Germany, has correctly identified our Motohistory Quiz picture as that of an experimental single-cam Horex cylinder head designed by Ludwig Apfelbeck. Apfelbeck is one of the great names in engineering history from the German-speaking region of Europe. Born in Knittelfeld, Austria in 1904, his breakthrough design was a patent in 1935 for a radial four-valve head with inlet and exhaust valves positioned opposite each other. This configuration (pictured below) results in the maximum utilization of the combustion chamber since the larger inlet valves, positioned on opposite sides of the head, cannot interfere with each other or make contact upon opening. Furthermore, the location of exhaust valves opposite each other gives better and more even distribution of heat, resulting in less distortion. A third, and perhaps the most important benefit is better swirl or turbulence with the incoming mixture, leading to better volumetric distribution of the charge and thus better combustion. Combined with very short, strait inlet manifolds, this was the ultimate high-flow head.
In 1939, Rudolf Schleicher of BMW recognized the artistry of Apfelbeck's work, and hired him, though this did not immediately benefit motorcycles. Rather, Apfelbeck (pictured here) was assigned to work with the DVL, the German Development Center for Aviation in the development of military aeronautical engines.
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