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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Belt Drive Conversion
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<blockquote data-quote="oexing" data-source="post: 177442" data-attributes="member: 1493"><p>I think you have answered your question yourself, the center row does not transmit much of the engine power - or maybe does as the clutch sprocket still got teeth at half size. But indeed the power requirement of the Miller is nothing , like 1/8 of one hp - 60 or 90 W or so. It is only the mass of the armature , 980 gr, that puts high loads on the split rollers when the shocks generated in the ESA when it hits the stops in both directions, arrive at the dynamo sprocket and want to accelerate or decelerate the rotor in a moment. That is why I´d bin the ESA for saving the chain and Alton or Miller from these shocks. On a Comet noone ever had a geared Alton fail from shredded Delrin teeth as it is driven from the timing gears, not by the triplex chain plus ESA ?? But on the twins there were a number of reports about failed plastic gears from ESA induced shocks, not by simple electric power overloads. Altons are installed on lots of classics without troubles when no ineffective ESAs try to wreck them. </p><p> The Spares Co is not interested in having a new design of ESA in supply like I made up , studying the well-proven BMW type for Vincent use. They only tidied up the curves so as the edges do not chip off like on original poor ESAs. </p><p> And yes, you could think about some limited-slip clutch in the dynamo sprocket for protecting the dynamo plus the chain rollers while you keep the ESA. I did two sets of friction clutches on my 3ph (servo motor) alternators, not because I believe in a real need for them when having my types of progressive ESAs on the crank. But it was sort of exercise to find an idea about slip clutches on the sprocket for Vincenteers to copy or at least some inspiration . So there are two phenolic paper friction plates plus preload from wave washers that can be set for just short of slipping at max. electric loads. My servo motors do at least 200 W and 14 V by having a converter plus rectifier hooked on them. They would do more than 40 V unregulated so I went for the converters and not for typical motorbike regulators. Some of the common mc regulators produce a lot of heat by shorts in one phase to keep voltage in limits, not acceptable. </p><p></p><p> Vic</p><p></p><p> BMW design type ESA for Vincents, three lobes :</p><p>[ATTACH=full]61375[/ATTACH]</p><p></p><p>[ATTACH=full]61376[/ATTACH]</p><p></p><p>friction clutch on sprocket:</p><p>[ATTACH=full]61377[/ATTACH]</p><p></p><p>[ATTACH=full]61378[/ATTACH]</p><p></p><p>[ATTACH=full]61379[/ATTACH]</p><p></p><p>[ATTACH=full]61380[/ATTACH]</p></blockquote><p></p>
[QUOTE="oexing, post: 177442, member: 1493"] I think you have answered your question yourself, the center row does not transmit much of the engine power - or maybe does as the clutch sprocket still got teeth at half size. But indeed the power requirement of the Miller is nothing , like 1/8 of one hp - 60 or 90 W or so. It is only the mass of the armature , 980 gr, that puts high loads on the split rollers when the shocks generated in the ESA when it hits the stops in both directions, arrive at the dynamo sprocket and want to accelerate or decelerate the rotor in a moment. That is why I´d bin the ESA for saving the chain and Alton or Miller from these shocks. On a Comet noone ever had a geared Alton fail from shredded Delrin teeth as it is driven from the timing gears, not by the triplex chain plus ESA ?? But on the twins there were a number of reports about failed plastic gears from ESA induced shocks, not by simple electric power overloads. Altons are installed on lots of classics without troubles when no ineffective ESAs try to wreck them. The Spares Co is not interested in having a new design of ESA in supply like I made up , studying the well-proven BMW type for Vincent use. They only tidied up the curves so as the edges do not chip off like on original poor ESAs. And yes, you could think about some limited-slip clutch in the dynamo sprocket for protecting the dynamo plus the chain rollers while you keep the ESA. I did two sets of friction clutches on my 3ph (servo motor) alternators, not because I believe in a real need for them when having my types of progressive ESAs on the crank. But it was sort of exercise to find an idea about slip clutches on the sprocket for Vincenteers to copy or at least some inspiration . So there are two phenolic paper friction plates plus preload from wave washers that can be set for just short of slipping at max. electric loads. My servo motors do at least 200 W and 14 V by having a converter plus rectifier hooked on them. They would do more than 40 V unregulated so I went for the converters and not for typical motorbike regulators. Some of the common mc regulators produce a lot of heat by shorts in one phase to keep voltage in limits, not acceptable. Vic BMW design type ESA for Vincents, three lobes : [ATTACH type="full"]61375[/ATTACH] [ATTACH type="full"]61376[/ATTACH] friction clutch on sprocket: [ATTACH type="full"]61377[/ATTACH] [ATTACH type="full"]61378[/ATTACH] [ATTACH type="full"]61379[/ATTACH] [ATTACH type="full"]61380[/ATTACH] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Belt Drive Conversion
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