Probably ridiculous question about shaft drives & alternatives
11-21-08, 05:58 PM
#26
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But feel free to share any old odball stuff with us.
Second thought, maybe it should go on the C&V board. I'll see it there anyway.
11-21-08, 07:20 PM
#27
Hoopy Frood
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11-22-08, 12:26 PM
#29
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During the bike boom of the 1890s I have read that about 1/3 of all patents granted in the U.S. were bicycle related.
Other than new materials and areodynamics there are very few truly new ideas in bikes that a thorough search of the patent office cannot find a precedence for, frequently from that period. What was not a success then could, with development, be considered revolutionary now.
Other than new materials and areodynamics there are very few truly new ideas in bikes that a thorough search of the patent office cannot find a precedence for, frequently from that period. What was not a success then could, with development, be considered revolutionary now.
11-22-08, 03:33 PM
#30
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Check out the Ferrari Colnago bike from 1988.
The efficiency of chain-drive is more than acceptable. Even if you could achieve 100% efficiency, you won't gain much. Or we could go back to riding one of these:
The efficiency of chain-drive is more than acceptable. Even if you could achieve 100% efficiency, you won't gain much. Or we could go back to riding one of these:
11-24-08, 10:56 AM
#31
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Here is a belt drive bike from 1890.
Last edited by MotoIdaho; 11-24-08 at 11:07 AM.
11-24-08, 11:03 AM
#33
'73 Motobecane, Catrike
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Dang, I don't know how to make the image smaller. Can someone who knows tell me?
11-24-08, 11:07 AM
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No. I'm an idiot. My drawing can't work. With a conventional hub, if the axle is supported on both sides, then the linkage between the rear wheel and pedals or idler has to go through the axle once every rotation.
To get around this you would need to change the way rear hubs work. The shaft needs to be at the end of the axle, hence outside the chainstay. Then you use a *rotating axle* along with bearings at the dropouts. Pretty weird.
To get around this you would need to change the way rear hubs work. The shaft needs to be at the end of the axle, hence outside the chainstay. Then you use a *rotating axle* along with bearings at the dropouts. Pretty weird.
Chain drive is very efficient. It is the derailleurs that mke the chain difficult to maintain and make a sealed drivetrain impractical. Single speeds and IGH setups are very low maintenance and often have a fully enclosed drive chain.
