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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
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<blockquote data-quote="Monkeypants" data-source="post: 1506" data-attributes="member: 2708"><p>Given this information, the actual alternator speed for either the Comet or the twin at 52 MPH in top gear can be calculated.</p><p>The Riders Handbook states that with standard gearing a twin engine does almost exactly 4600 RPM in top gear. This means that at 52 MPH the engine will turn .52 X 4600= 2392 RPM and the Alternator will turn 2392 x 1.25 = 2990 RPM.</p><p>For the Comet, the Riders Hand book states that with standard gearing the engine turns 610 RPM for every ten miles per hour of road speed , so at 52 MPH the Comet engine will turn 610x 5.2= 3172. Rapcom has stated that with the Comet the engine/alternator ratio is one to one so the alternator will also be turning 3172 RPM. Since the Alton balances my 130 watt load at 52 MPH on my twin, on a Comet at 52 MPH you should show a slight positive charge with a 130 watt load, with balance happening around 49 MPH.</p><p>So for any given road speed in top gear the Comet will turn the Alton faster than the twin.</p><p>The new Alton puts out lots of power at low speed with a twin and will do even better (slightly) on the Comet.</p></blockquote><p></p>
[QUOTE="Monkeypants, post: 1506, member: 2708"] Given this information, the actual alternator speed for either the Comet or the twin at 52 MPH in top gear can be calculated. The Riders Handbook states that with standard gearing a twin engine does almost exactly 4600 RPM in top gear. This means that at 52 MPH the engine will turn .52 X 4600= 2392 RPM and the Alternator will turn 2392 x 1.25 = 2990 RPM. For the Comet, the Riders Hand book states that with standard gearing the engine turns 610 RPM for every ten miles per hour of road speed , so at 52 MPH the Comet engine will turn 610x 5.2= 3172. Rapcom has stated that with the Comet the engine/alternator ratio is one to one so the alternator will also be turning 3172 RPM. Since the Alton balances my 130 watt load at 52 MPH on my twin, on a Comet at 52 MPH you should show a slight positive charge with a 130 watt load, with balance happening around 49 MPH. So for any given road speed in top gear the Comet will turn the Alton faster than the twin. The new Alton puts out lots of power at low speed with a twin and will do even better (slightly) on the Comet. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
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