greenerwheels
10 W
Those of you Portland Locals that were lucky enough to go to the PSU Earthday Event got to see my Reinvented Cobra, but no one saw it run, mostly because I hadn't finished the rear axle mount, well today its done, well never done but ride-able. I wish I could have documented the build, but I usually work alone in my shop and when I'm on a mission I have no time to put the idea down to grab a camera, particularly when I'm not sure where the idea is taking me.
But anyway today was an excellent day (we don't get enough of these days here in Portland, tomorrow and the rest of the week the forcast is normal......... translated = rain)so today was the day to take the Cobra out for a spin and snap a few photo's. Details after the break:
Ok why you ask did I do this? Well with this configuration, I don't have to mess with spoking the hub motor, I can select gearing, I can easily swap out different motors and since both sprockets on the rear axle are freewheeling, you don't have to drive through the hub motor when your pedaling, no cogging, no friction and it works.
I eventually want to use the Hub motor to drive a NuVinci hub as a jackshaft that's controlled by a small microprocessor that monitors the controller current, the processor will then drive a stepper motor to control the NuVinci hub to adjust the gearing of the hub motor for either maximum performance or efficiency. Ran out of money before I got that far, however I did leave the mount so I can add the NuVinci hub later.
Another feature of this setup, its all bolted on, I can remove it and stick it on your standard Granny trike, you could change the sprockets to pull just about anything if you could get enough traction to the rear tires. Thanks to Jason at ebikekit.com for his support and Neptronix for his gentle prodding.
I've got some video I need to edit and put on youtube and after a few shake down miles, I'll install the 12 fet controller I recently purchased from Lyen.
Thanks
Greenerwheels
But anyway today was an excellent day (we don't get enough of these days here in Portland, tomorrow and the rest of the week the forcast is normal......... translated = rain)so today was the day to take the Cobra out for a spin and snap a few photo's. Details after the break:
Ok why you ask did I do this? Well with this configuration, I don't have to mess with spoking the hub motor, I can select gearing, I can easily swap out different motors and since both sprockets on the rear axle are freewheeling, you don't have to drive through the hub motor when your pedaling, no cogging, no friction and it works.
I eventually want to use the Hub motor to drive a NuVinci hub as a jackshaft that's controlled by a small microprocessor that monitors the controller current, the processor will then drive a stepper motor to control the NuVinci hub to adjust the gearing of the hub motor for either maximum performance or efficiency. Ran out of money before I got that far, however I did leave the mount so I can add the NuVinci hub later.
Another feature of this setup, its all bolted on, I can remove it and stick it on your standard Granny trike, you could change the sprockets to pull just about anything if you could get enough traction to the rear tires. Thanks to Jason at ebikekit.com for his support and Neptronix for his gentle prodding.
I've got some video I need to edit and put on youtube and after a few shake down miles, I'll install the 12 fet controller I recently purchased from Lyen.
Thanks
Greenerwheels