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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Cadwell Landsdowne video + Suspension Setup
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<blockquote data-quote="timetraveller" data-source="post: 142686" data-attributes="member: 456"><p>I remember discussing this with someone a few years ago. Possibly it might have been you Erk. I have forgotten the rate of the inner springs but if they were shortened then the rate would have increased anyway. I think that the concept might work but it is possible that softer inner spings might be needed to get the best out of the idea. If anyone wants to try this then I could get some suitable springs made but we would have to discuss first what strength might be needed. Using the 36 lbs/inch springs as an example, these are 16.5" long and are installed with a three inch preload giving 216 lbs force, from both springs, before fork movement. Suppose you want the extra force to kick in after the first inch of movement then the inner springs would have to be 12.5" long and after the first one inch of movement the rate would go up from36 lbs/inch to 36+ whatever the smaller spring rate was. Suppose they were 10 lbs/inch then the rate would go up to 46 lbs/inch which is roughly the same as the strongest spring I have provided at 45 lbs/inch. If anyone want to discuss this on here then if there is interest perhaps we can experiment. I could do some calculations and plot some graphs if that would help.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 142686, member: 456"] I remember discussing this with someone a few years ago. Possibly it might have been you Erk. I have forgotten the rate of the inner springs but if they were shortened then the rate would have increased anyway. I think that the concept might work but it is possible that softer inner spings might be needed to get the best out of the idea. If anyone wants to try this then I could get some suitable springs made but we would have to discuss first what strength might be needed. Using the 36 lbs/inch springs as an example, these are 16.5" long and are installed with a three inch preload giving 216 lbs force, from both springs, before fork movement. Suppose you want the extra force to kick in after the first inch of movement then the inner springs would have to be 12.5" long and after the first one inch of movement the rate would go up from36 lbs/inch to 36+ whatever the smaller spring rate was. Suppose they were 10 lbs/inch then the rate would go up to 46 lbs/inch which is roughly the same as the strongest spring I have provided at 45 lbs/inch. If anyone want to discuss this on here then if there is interest perhaps we can experiment. I could do some calculations and plot some graphs if that would help. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Cadwell Landsdowne video + Suspension Setup
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