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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Brake Plate Centering.
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<blockquote data-quote="Vincent Brake" data-source="post: 22640" data-attributes="member: 398"><p>FLexing.</p><p></p><p>When having a closer look to the whole Org. set up, it flexes, thats for sure, Question is where? and how to overcome it?</p><p>The cam pivot bends inwards, as is the shoe pivot, both creating a force, thus flexing, on the steel plates, this is say 30% of the problem, as most worse is the flexing of the shoe itself, very near the pivot. When braking, the one shoe's leading edge takes about 70% of it all, this force is applying a bending moment on the shoes, remedy: weld it up at the back to near the pivot. </p><p>Next this force is in need of its counterforce (ok english??), to have 0 momentum on the plate, this comes from the trailing shoe, partly from this shoes leading surface near the pivot, this is by Phisical law limited to take this great force up. (allto be seen in braking motion) so here comes another problem of the to light constuction of the steel plates, as the big leading shoe's force has to be taken up mostly by the brake plate, through the pivot, It is very hard to overcome this problem, as there is an offset to the centre of brakeing (seen axially) to the point where the brake plate leads this force away.</p><p></p><p>I will post a pict. soon. </p><p></p><p>Besides, all I have done in my 2 x 2 LS brake set up, is to see to it that the stiffness of the shoes themselves take the most of the Normal (90 degrees) force creating the friction force, and there is of couse an equal counterpart taking on the created force.</p><p></p><p>Happy Braking.</p><p></p><p>Vincent (brake) Speet</p></blockquote><p></p>
[QUOTE="Vincent Brake, post: 22640, member: 398"] FLexing. When having a closer look to the whole Org. set up, it flexes, thats for sure, Question is where? and how to overcome it? The cam pivot bends inwards, as is the shoe pivot, both creating a force, thus flexing, on the steel plates, this is say 30% of the problem, as most worse is the flexing of the shoe itself, very near the pivot. When braking, the one shoe's leading edge takes about 70% of it all, this force is applying a bending moment on the shoes, remedy: weld it up at the back to near the pivot. Next this force is in need of its counterforce (ok english??), to have 0 momentum on the plate, this comes from the trailing shoe, partly from this shoes leading surface near the pivot, this is by Phisical law limited to take this great force up. (allto be seen in braking motion) so here comes another problem of the to light constuction of the steel plates, as the big leading shoe's force has to be taken up mostly by the brake plate, through the pivot, It is very hard to overcome this problem, as there is an offset to the centre of brakeing (seen axially) to the point where the brake plate leads this force away. I will post a pict. soon. Besides, all I have done in my 2 x 2 LS brake set up, is to see to it that the stiffness of the shoes themselves take the most of the Normal (90 degrees) force creating the friction force, and there is of couse an equal counterpart taking on the created force. Happy Braking. Vincent (brake) Speet [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Brake Plate Centering.
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