D
duivendyk
Guest
Kerf has successfully implemented a 2 speed,left side drive Staton drive,by incorporating a chain tensioner in the non-driven side of the final drive to the rear wheel and adapting (as far as I can determine) a front derailleur to do the actual shifting on the driven side.This apparently is working quite well as long as you throttle back,and he deserves to be commended for this pioneering accomplishment.
I had been thinking along similar lines with the DAX Titan,which has a 5:1 reduction on the engine itself,so that only around another 4-5:1 reduction would needed.
For obvious reasons it would be highly desirable to have a variable transmission to the rearwheel.I thought about derailleur in the primary drive to the jackshaft,but that looked impractal due to the short chain length and limited space, but considered that a front deralleur could be made to do the shifting in the final drive and a rear one easily converted into a chaintensioner.
Both would be mounted on the bottom side of the engine mounting plate.The rear one,on the slack (front) side of the chain only requires a simple bracket to mount it.Solidly mounting the front one,with some adjustment capability is more of a mechanical challenge but certainly doable in my opinion.
The drive sprockets would need to be mounted on the jackshaft ,13-15-17-19t would be enough I think,giving close to a 150% range, preferably inconjunction with a freewheel.It might also be a good idea to put some reduction in the primary drive to the jackshaft
I don't have a DAX Titan to play around with (NuVinci),so other pioneers will have to step up to the plate to advance the state of the art.
I had been thinking along similar lines with the DAX Titan,which has a 5:1 reduction on the engine itself,so that only around another 4-5:1 reduction would needed.
For obvious reasons it would be highly desirable to have a variable transmission to the rearwheel.I thought about derailleur in the primary drive to the jackshaft,but that looked impractal due to the short chain length and limited space, but considered that a front deralleur could be made to do the shifting in the final drive and a rear one easily converted into a chaintensioner.
Both would be mounted on the bottom side of the engine mounting plate.The rear one,on the slack (front) side of the chain only requires a simple bracket to mount it.Solidly mounting the front one,with some adjustment capability is more of a mechanical challenge but certainly doable in my opinion.
The drive sprockets would need to be mounted on the jackshaft ,13-15-17-19t would be enough I think,giving close to a 150% range, preferably inconjunction with a freewheel.It might also be a good idea to put some reduction in the primary drive to the jackshaft
I don't have a DAX Titan to play around with (NuVinci),so other pioneers will have to step up to the plate to advance the state of the art.
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