etard
100 kW
While you guys have been busy trying to figure out what the hell the electrical engineers are talking about in the motor thread, I have been trying to figure a better solution than the 3 speed rear hubs. I am not sold on the ability of these to take anything above 1000 watts.
What I came up with is taking a planetary gearbox (one where the body is round) and adapting this into a rear hub. By process of welding or possibly screwing in two round discs to attach the spokes to on both sides of the body, one could have the speed reduction inside of the hub. You could also use a billet ring that uses the new push style spokes that are stronger than traditional spokes. The motor would turn the input shaft, the output side remain fixed and the body of the gearbox would turn. I also propose a much stouter rear assembly that rides on large inner diameter bearings that surround the gearbox and go inside large diameter rear dropout "cups" , for lack of a better term, that somehow clip onto the hub by way of retaining ring etc... Please tell me if there is an error in my thinking here, I am not too savvy on the theoretical modeling. Now this won't give us gears like we want, perhaps this can be taken care of by an auxilliary method, but it will give a fairly stealthy, very strong rear end if my thinking is correct. As for attaching gears for pedaling (who does that over 2kw :wink: ) you might be able to do this by attaching a cassette directly to the gearbox body. I am just throwing ideas out, any criticism and taunting is welcome.
If anything, this space can be used for processes of designing stronger rear dropouts better suited to our needs.
What I came up with is taking a planetary gearbox (one where the body is round) and adapting this into a rear hub. By process of welding or possibly screwing in two round discs to attach the spokes to on both sides of the body, one could have the speed reduction inside of the hub. You could also use a billet ring that uses the new push style spokes that are stronger than traditional spokes. The motor would turn the input shaft, the output side remain fixed and the body of the gearbox would turn. I also propose a much stouter rear assembly that rides on large inner diameter bearings that surround the gearbox and go inside large diameter rear dropout "cups" , for lack of a better term, that somehow clip onto the hub by way of retaining ring etc... Please tell me if there is an error in my thinking here, I am not too savvy on the theoretical modeling. Now this won't give us gears like we want, perhaps this can be taken care of by an auxilliary method, but it will give a fairly stealthy, very strong rear end if my thinking is correct. As for attaching gears for pedaling (who does that over 2kw :wink: ) you might be able to do this by attaching a cassette directly to the gearbox body. I am just throwing ideas out, any criticism and taunting is welcome.
If anything, this space can be used for processes of designing stronger rear dropouts better suited to our needs.