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Jun 18, 2008 14:32:15 GMT
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Looking through a photography website and came across this:  I like the concept of using the brake disc as the sprocket, has anyone else got any other interesting engineering ideas that they have seen? |
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Tim
Posted a lot
Posts: 3,340
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Jun 18, 2008 15:53:32 GMT
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Thats a terrible idea - any filth from the chain goes straight into the disc pads
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Jun 18, 2008 16:28:45 GMT
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Looks pretty good though, i've seen some where the disc runs just insde the wheel rim, also super cool.
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Jun 18, 2008 16:30:22 GMT
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if filth could get in there it would where ever the caliper was.
ive never seen a brake on the sproket at the wheel end of the chain only at the trans end
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Interesting idea???tourettesteddy
@GUEST
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Jun 18, 2008 16:46:55 GMT
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It looks cool  But what about chain lube getting on the brake disc? |
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Jun 18, 2008 16:59:19 GMT
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It doesnt look he lubed the chain, lol, guess thats one way around the problem.
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Jun 18, 2008 18:58:44 GMT
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you get the sports bikes like Triumphs and Ducatis that have a single sided swing arm.
Even 125s have that.
A big V twin will have lots of engine braking.
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Tim
Posted a lot
Posts: 3,340
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Looks pretty good though, i've seen some where the disc runs just insde the wheel rim, also super cool. There is a company with an MTB trials bike with the same arrangement - problem on an MTB is that the slightest buckle in the wheel knackers the braking up completely |
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Tim
Posted a lot
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It doesnt look he lubed the chain, lol, guess thats one way around the problem. bet that sounds sweeeet :-) |
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Jun 19, 2008 18:09:01 GMT
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A bell mouth and 20" pipes...wont hear much else
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Jun 20, 2008 13:43:35 GMT
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Guess it must work fairly OK because it's a pretty common setup. But the state of that chain sort of shows you have to be a bit frugal with the chain lube I guess...
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'66 Amazon <-> '94 LS400 <-> '86 Suzuki 1135 EFE
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street
Posted a lot
6.2 ft/lbs of talk
Posts: 4,662
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Jun 20, 2008 14:15:04 GMT
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I like that idea!!
Only the other day I decided it would be a good idea to build a fixie with a caliper acting on a disk attatched to the left-hand-crank. Just for the novely of it!
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Tim
Posted a lot
Posts: 3,340
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Jun 20, 2008 14:37:44 GMT
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I like that idea!! Only the other day I decided it would be a good idea to build a fixie with a caliper acting on a disk attatched to the left-hand-crank. Just for the novely of it! Thats been made already . . . but I cant find the pic :-) FOUND IT! bikehugger.com/2008/02/at_the_handbuilt_bike_show_ano.htm |
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Last Edit: Jun 20, 2008 14:40:44 GMT by Tim
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Jun 20, 2008 15:06:04 GMT
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Centrifugal force should throw chain lube away from the brake pads, and motorcycle rear brakes don't provide much stopping power anyway. The bike with the disc-brake on the crank might benefit from one of these. |
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Last Edit: Jun 20, 2008 15:16:58 GMT by skinley
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Tim
Posted a lot
Posts: 3,340
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Jun 20, 2008 15:49:48 GMT
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Centrifugal force should throw chain lube away from the brake pads, and motorcycle rear brakes don't provide much stopping power anyway. The bike with the disc-brake on the crank might benefit from one of these.erm, it would certainly make stopping interesting :-) |
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Jun 20, 2008 16:10:19 GMT
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erm, it would certainly make stopping interesting :-) It would work exactly the same as on a fixed gear bike, but you could also stop pedalling while braking. |
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Last Edit: Jun 20, 2008 16:11:48 GMT by skinley
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Tim
Posted a lot
Posts: 3,340
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Jun 20, 2008 16:32:29 GMT
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erm, it would certainly make stopping interesting :-) It would work exactly the same as on a fixed gear bike, but you could also stop pedalling while braking. my brains too tired to figure that out ;D |
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street
Posted a lot
6.2 ft/lbs of talk
Posts: 4,662
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Jun 20, 2008 17:13:13 GMT
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I like that idea!! Only the other day I decided it would be a good idea to build a fixie with a caliper acting on a disk attatched to the left-hand-crank. Just for the novely of it! Thats been made already . . . but I cant find the pic :-) FOUND IT! bikehugger.com/2008/02/at_the_handbuilt_bike_show_ano.htmBums!  Unless it was my time-travelling future self who made it, in which case.... bravo old boy  Seriously though I thought I might have seen it before but couldn't be sure if it was my mind playing tricks. Skinley, that retro Shimano set-up is ace!! Never seen or heard of that, did it ever make production? Want!  |
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Jun 20, 2008 18:58:07 GMT
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Skinley, that retro Shimano set-up is ace!! Never seen or heard of that, did it ever make production? Want! I think it did but it was probably not too successful, someone once called it; "a solution for a problem that never existed" .  |
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Last Edit: Jun 20, 2008 18:59:14 GMT by skinley
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Tim
Posted a lot
Posts: 3,340
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Jun 20, 2008 22:02:35 GMT
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It wouldnt work on the fixie setup with the brake at the crank - one way round would let chain freewheel, giving you no braking, and the other way around would give you no forward motion :-)
its an interesting idea, but would need a hell of a chain as you could really slam the anchors on - if the back wheel gets grip...
The freewheel at the chainring is standard on a lot of trials bikes, so you can reset your lead foot whilst the chain/bash is resting on an obstacle
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Unless it was my time-travelling future self who made it, in which case.... bravo old boy 
