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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Eight inch brake ?
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<blockquote data-quote="Robert Watson" data-source="post: 89693" data-attributes="member: 38"><p>When you pull on the handle bar lever you are using a long lever pulling a short lever thru the pivot pin fulcrum, which shortens the pull and increases the power, based on the lever lengths from the fulcrum. It is exact ratio of the lengths. If the lever is 7/8 from the fulcrum to the cable and the spring scale is 31/2 inches from the fulcrum to the point on the hand lever where the scale is attach, you will get 1/4 the travel and 4 times the force. In your case (if indeed those are the correct measurements) this would show that you are pulling a 40lb load on the cable end and producing 20 lbs at each brake, exactly what you would expect from a twin pull cable setup.</p></blockquote><p></p>
[QUOTE="Robert Watson, post: 89693, member: 38"] When you pull on the handle bar lever you are using a long lever pulling a short lever thru the pivot pin fulcrum, which shortens the pull and increases the power, based on the lever lengths from the fulcrum. It is exact ratio of the lengths. If the lever is 7/8 from the fulcrum to the cable and the spring scale is 31/2 inches from the fulcrum to the point on the hand lever where the scale is attach, you will get 1/4 the travel and 4 times the force. In your case (if indeed those are the correct measurements) this would show that you are pulling a 40lb load on the cable end and producing 20 lbs at each brake, exactly what you would expect from a twin pull cable setup. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Eight inch brake ?
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