One of the best solutions would, indeed, be a Sproder (sprocket/rotor). The chain lube is not a huge concern for them. There are non-greasy lubes out there. Also, it is possible to get a sprocket and a rotor side-by-side in that area.etard wrote:I think alot of us are going to put this system on DH bikes, so my concern is what to do about a rear brake. Looking at my bike, if the drive unit where to feed from the top of the rear tire to a gear on the rear disk mount, it could be possible to have a disc caliper between the chain, inside the drive. What I am proposing is that the gear and the braking could be done on the same piece of metal. However, oil and brakes do not seem to be an ideal combination, if you used a belt and made a custom brake caliper that left room for a fairly wide belt on the inside, this could be done and still be bolt on to original brake mount without frame modification. (breath in)
Is it possible to use belt drive for final drive? Or could I use a chain wax instead of grease and just add teeth to my disk brake caliper?
Do you think you could machine a custom brake caliper that fits around a belt drive sprocket?
The way I see it, is if everybody contributes something, the end product could be available sooner. Oh by the way, I have access to a waterjet (is that what its called?) if that would help to make custom sprockets, gears, calipers, etc...
I am going with chain final drive. I may move to belt on my recumbent at some point. But, for width concerns with a rear brake, chain is best.
Of course, there is also the option of a small disc on the output shaft of the reduction unit. I just want to get the reduction done first.
E-tard, I live the avatar pic. I am watching the Aptera with great interest. Heck, I am looking at building a "Neighborhood Electric" slightly oversized tadpole trike. It would basically be a full suspension version of a typical pedalled trike with double wishbone front suspension and a much wider front end for stability, no pedals, and a steering "Wheel" like a Cessna yoke that uses mostly (or all) hand controls. I am looking into the laws regarding this right now.