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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
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<blockquote data-quote="Bart" data-source="post: 128565" data-attributes="member: 4781"><p>About it being economical: probably not, but what's the volume of production anyway?</p><p>We're not so much interested in that. Cost of design far outweighs production anyway!</p><p></p><p>Machining time will be about 45 to 50 mins in hardened steel with insanely smooth surface. In aluminium it was done in about 30 mins and I can do something else. Load the machine with ten parts and go for a ride in the mean time! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /></p><p></p><p>The shape, as symmetrical as it is now, has the (arguably small) advantage of two line contacts per lobe instead of only one, reducing wear.</p><p></p><p>I did draw a 60 degree steepest indeed, that's what we'll have to determine.</p><p>I think you're right about the function: smoothen out engine pulsations.</p><p></p><p>I'm guessing that... knowing the average engine torque at a certain engine speed, inertia of the crankshaft and the fact that only on one of four strokes per cylinder the torque is generated (and then even in a small part of the powerstroke itself), the angular movement of the crankshaft can be calculated -under the assumption that the primary drive chain rotates at a uniform speed-</p><p>Off to the white board!</p></blockquote><p></p>
[QUOTE="Bart, post: 128565, member: 4781"] About it being economical: probably not, but what's the volume of production anyway? We're not so much interested in that. Cost of design far outweighs production anyway! Machining time will be about 45 to 50 mins in hardened steel with insanely smooth surface. In aluminium it was done in about 30 mins and I can do something else. Load the machine with ten parts and go for a ride in the mean time! ;) The shape, as symmetrical as it is now, has the (arguably small) advantage of two line contacts per lobe instead of only one, reducing wear. I did draw a 60 degree steepest indeed, that's what we'll have to determine. I think you're right about the function: smoothen out engine pulsations. I'm guessing that... knowing the average engine torque at a certain engine speed, inertia of the crankshaft and the fact that only on one of four strokes per cylinder the torque is generated (and then even in a small part of the powerstroke itself), the angular movement of the crankshaft can be calculated -under the assumption that the primary drive chain rotates at a uniform speed- Off to the white board! [/QUOTE]
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