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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Trevor Southwell re brakes
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<blockquote data-quote="davidd" data-source="post: 177698" data-attributes="member: 1177"><p>I am not certain this is true. I have no "dips" on my shoes and I have the linings on the center of the shoe. When calculating the brake factor of a drum brake, it is based on the mu of the brake lining and the angles of where the linings start and stop on the brake shoes in relation to the centerline of the axle hole (drawn through the center of the cam and pivots). The mu of my linings is just below 0.50 (AM4 is 0.44 mu). With the stock Vincent brake geometry, they work very well. I have also used in the equations the mu numbers from various linings that produce very high brake factors. This led me to believe that the original geometry was good, but the mu numbers of the original shoe linings were way too low.</p><p></p><p>[ATTACH=full]61467[/ATTACH]</p><p></p><p>These shoes have a hardened and ground steel H48 that is cast into the shoe.</p><p></p><p>[ATTACH=full]61468[/ATTACH]</p><p></p><p>I do support your experimentation because the more data that is available the better off we all are. Best of luck.</p><p></p><p>David</p></blockquote><p></p>
[QUOTE="davidd, post: 177698, member: 1177"] I am not certain this is true. I have no "dips" on my shoes and I have the linings on the center of the shoe. When calculating the brake factor of a drum brake, it is based on the mu of the brake lining and the angles of where the linings start and stop on the brake shoes in relation to the centerline of the axle hole (drawn through the center of the cam and pivots). The mu of my linings is just below 0.50 (AM4 is 0.44 mu). With the stock Vincent brake geometry, they work very well. I have also used in the equations the mu numbers from various linings that produce very high brake factors. This led me to believe that the original geometry was good, but the mu numbers of the original shoe linings were way too low. [ATTACH type="full"]61467[/ATTACH] These shoes have a hardened and ground steel H48 that is cast into the shoe. [ATTACH type="full"]61468[/ATTACH] I do support your experimentation because the more data that is available the better off we all are. Best of luck. David [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Trevor Southwell re brakes
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