crossbreak wrote:looks like crazy power for this small bike. i like it. it plays in the league of the e-moulton miles build.
I found this cheap foldable bike at the bay and would like electrify it with a 500W hub motor (quick and simple):
I use bendable alloy sheets (Al Mg 3, 2.5 and 5mm thick) for my shaft mounts. It is also easy to weld and cut. And it is durable if the part is designed right.
The pieces which fit the frame can be made of plastic - I use 15mm thick PE plastic for it.
crossbreak wrote:Why don't you run the motor power through the NuVinci?
1) Not a lot of chain wrap on the pedal chainring. Maybe that can be solved with a chain tensioner between the motor and the pedal chainring.
2) Unless the motor has really low KV, and is run with low voltage, you will need some reduction.
I'd love to, and some day I might. But for now, it's all about reliability. Powering through the NuVinci would mean both human and e-power through one chain. Complex arrangement at the drive sprocket. Extra stress to NuVi freewheel and internals. Too much risk of something breaking
In contrast, putting e-power on the left means I have two fully independent power sources to get me home. If "one side" should fail, I can detach the chain on that side at the master link, throw it in the bag, and get home on the other power source, no sweat.
crossbreak wrote:Are you also thinking about a custom battery cases and mounts for your bikes? A carbon housing like the one you make for the belt-drive would be neat
cross break wrote:The chain drag could be met by adding a freewheel at the rear shaft. But it's hard to find one that fits
crossbreak wrote:The fact that you dont need a tensioner is great
I almost wanted to ask you if you would like to add a different kind of tnesioner, one that varies distance between the shafts.
I just like using them
crossbreak wrote:Also have a look at bended alloy ... it's too easy, cheap and helpful to miss
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