recumpence wrote:Agreed, an idler would be needed.
I like the serial drive option, except that I do a lot of pedal only riding too and use the motor for hills and what-not. A serial drive has noticeable added drag. Non-serial drives have much less drag and seems to be roughly the same amount of work to complete.
The cells are rated conservatively by GM at 7.8C, Yabert's tests of Volt packs on the DiyEv car forum suggest a higher C rate, 15+ C!.
$1,400 plus $360 freight. Still over $1k less than new lead!
MitchJi wrote:Serial drive the pedals and motor turn the same shaft. If there is a FW on the motor end of the shaft I think the only extra drag when pedaling would be (if I'm missing something let me know):
1. the longer shaft
2. the friction of the FW
3. possibly a crooked chain line
I don't think 1 and 2 are significant. Marcus (who did a lot of testing) told me 3 isn't very much.
Miles wrote:Yes, that would be better for pedalling but less efficient for the motor. There's no ideal set-up - pick your compromise for the intended use.
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