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Tech. Advice: Series 'A' 500cc/1000cc Bikes
Miller Mag-Dyno Parts Needed
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<blockquote data-quote="timetraveller" data-source="post: 163839" data-attributes="member: 456"><p>I have no personal experience with these devices but BigEd's comments above might be relevant. When people first started trying to fit alternators as dynamo replacements several people tried toothed belts. The systems generally failed as the toothed belts do not allow for any slippage and therefore impart any shock loads to all the components. When I designed the 'Walkernator', with Dick Sherwin, I chose to use the poly vee belts deliberately to allow some slippage to get rid of the shock loads. I phoned one of the belt manufacturing company and by chance was put through to their chief designer. At that stage we were using 30 amp Iskra alternators. 30 amps at 14.3 volts is over 0.4 kwatt and one kilowatt is 1.34 HP so about half a horse power. I was told that a three groove belt would transmit a full horse power so the six groove belts we use are well over specked. I now provide a 40 amp alternator and the six groove belts have proven totally reliable with those as well. If you were going for a belt drive I would certainly recommend a poly vee belt.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 163839, member: 456"] I have no personal experience with these devices but BigEd's comments above might be relevant. When people first started trying to fit alternators as dynamo replacements several people tried toothed belts. The systems generally failed as the toothed belts do not allow for any slippage and therefore impart any shock loads to all the components. When I designed the 'Walkernator', with Dick Sherwin, I chose to use the poly vee belts deliberately to allow some slippage to get rid of the shock loads. I phoned one of the belt manufacturing company and by chance was put through to their chief designer. At that stage we were using 30 amp Iskra alternators. 30 amps at 14.3 volts is over 0.4 kwatt and one kilowatt is 1.34 HP so about half a horse power. I was told that a three groove belt would transmit a full horse power so the six groove belts we use are well over specked. I now provide a 40 amp alternator and the six groove belts have proven totally reliable with those as well. If you were going for a belt drive I would certainly recommend a poly vee belt. [/QUOTE]
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Tech. Advice: Series 'A' 500cc/1000cc Bikes
Miller Mag-Dyno Parts Needed
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