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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Perfidious Albion
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<blockquote data-quote="vibrac" data-source="post: 65571" data-attributes="member: 60"><p>I am having some difficulty calculating the internal ratios of my Albion Box in a form normally accepted and shown in books. In the past like many others I just read the ratios from a book and calculate speeds via sprocket ratios and chose accordingly but of course with an Albion box who knows what I have.</p><p></p><p>I thought it would be easy count the clutch shaft turns for one turn of the gearbox sprocket and express the result with top as unity 1:1 hoping for a result of say1:1 top, 1:2, 1:5, 2:0 bottom </p><p>However (with the box detached) in each gear I get :</p><p>For one turn of the gearbox sprocket shaft the following turns of the clutch shaft(approximate)</p><p></p><p>Top 1.75</p><p></p><p>Third 1.33</p><p></p><p>Second 1.2</p><p></p><p>First 1.0</p><p></p><p>Or (and this is one of the things not clear to me) it could be expressed as turns of the gearbox for one of the clutch (reciprocal)</p><p></p><p>Top .57</p><p></p><p>Third 75</p><p></p><p>Second .83</p><p></p><p>First 1.0</p><p></p><p>Assuming it is the first method and expressing top as unity I get</p><p></p><p>Top 1:1 third 1:1.3 second 1: 1.4 bottom 1:1.75</p><p></p><p>This is clearly wrong or I have a strange set of ratios….</p></blockquote><p></p>
[QUOTE="vibrac, post: 65571, member: 60"] I am having some difficulty calculating the internal ratios of my Albion Box in a form normally accepted and shown in books. In the past like many others I just read the ratios from a book and calculate speeds via sprocket ratios and chose accordingly but of course with an Albion box who knows what I have. I thought it would be easy count the clutch shaft turns for one turn of the gearbox sprocket and express the result with top as unity 1:1 hoping for a result of say1:1 top, 1:2, 1:5, 2:0 bottom However (with the box detached) in each gear I get : For one turn of the gearbox sprocket shaft the following turns of the clutch shaft(approximate) Top 1.75 Third 1.33 Second 1.2 First 1.0 Or (and this is one of the things not clear to me) it could be expressed as turns of the gearbox for one of the clutch (reciprocal) Top .57 Third 75 Second .83 First 1.0 Assuming it is the first method and expressing top as unity I get Top 1:1 third 1:1.3 second 1: 1.4 bottom 1:1.75 This is clearly wrong or I have a strange set of ratios…. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Perfidious Albion
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