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General Chat (Vincent Related)
Alternater drive
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<blockquote data-quote="timetraveller" data-source="post: 23466" data-attributes="member: 456"><p>We use the same 'J' section, 6 rib poly vee belt on the 'Walkernator' as well. When I was doing the design I phoned up one of the manufacturers and ended up speaking to their chief design engineer. I told him what the loads were, exaggerating by stating that we hoped to extract about one kilowatt from a rather jerky drive system, and he said that three ribs would be enough to take the load. As there is no where near a kilowatt of power being consumed this means that we have a factor of more than two over design, which makes me feel comfortable when selling something. I managed to arrange the pulley sizes so that on the 'B' and 'C' twins the alternator is rotating at about double the engine speed. Standard is one and a quarter. On the 'D's with the recess on top of the gearbox I can do better than that while on the Comets the restricted space for the driving pulley, where the dynamo sits, means that I can't quite get about one and a half times the engine speed. Note however that the Comet is lower geared than the twins so that at any given road speed the engine is rotating more rapidly than it would be on a twin.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 23466, member: 456"] We use the same 'J' section, 6 rib poly vee belt on the 'Walkernator' as well. When I was doing the design I phoned up one of the manufacturers and ended up speaking to their chief design engineer. I told him what the loads were, exaggerating by stating that we hoped to extract about one kilowatt from a rather jerky drive system, and he said that three ribs would be enough to take the load. As there is no where near a kilowatt of power being consumed this means that we have a factor of more than two over design, which makes me feel comfortable when selling something. I managed to arrange the pulley sizes so that on the 'B' and 'C' twins the alternator is rotating at about double the engine speed. Standard is one and a quarter. On the 'D's with the recess on top of the gearbox I can do better than that while on the Comets the restricted space for the driving pulley, where the dynamo sits, means that I can't quite get about one and a half times the engine speed. Note however that the Comet is lower geared than the twins so that at any given road speed the engine is rotating more rapidly than it would be on a twin. [/QUOTE]
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Alternater drive
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