Possible Electric Bicycle ? [ trolling motor ]

Jemma, yes that's not weird at all ...in fact I don't think theres a much better or lower place to put it .... those super large marine batts are at least 45 pounds or more I'm guessing.

The only other thing re batteries I can think of is two 20lb batteries to each side of the rear frame... much like storage bags on harleys.... someone gimme a Nimbus...

With the chain idea I was thinking of a single long chain... tensioned correctly with the engine over the rear wheel/ drive on the derailler side of the bike...

I think that would munch a hub in short order..

Jemma xx
 
Well, If I can first get an answer on what the average electric bike does rpm wise, I'll give it a try. I would do it in a minute if I can be assured that 1400 rpm on the current chinese sprocket and my 36 tooth final drive would equal at least 20 mph and I'd be suprised if it doesnt. I shouldn't compare apples to oranges but still, if 40 pounds at 1400rpm shows 10mph on my electronic speedometer for such water drag and boat weight, expecting 20 mph on land from a bike seems reasonable.
 
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1400 rpms seems really good. no gear reduction will be required.
it get's better....using jpilot's gear ratio calculator, a 10 tooth sprocked on the motor, and a 44 tooth on a 26" wheel, 1400 rpm's will net 26 mph.
add a projected 4 to 6 hours battery life...an wow!!

me thinks you stumbled onto something big!!:D
 
Thanks for this needed info Srdavo ... I'm really tempted as I will never need this motor again .... I'm also thinking of a simple (what is the proper name of those 1 way slipping gears ?) gear that lets me forget about any dis-engagememt needs when motor is off.
 
Thanks for this needed info Srdavo ... I'm really tempted as I will never need this motor again .... I'm also thinking of a simple (what is the proper name of those 1 way slipping gears ?) gear that lets me forget about any dis-engagememt needs when motor is off.

My currie motor goes into a planetary gear for reduction,,,then to a sprocket with a clutched bearing. which allows the bike to freewheel without turning the motor.
 
Yes, that's what I would have to do .... this seems like it would be a fun time killer of a build ... I'd actually like to do it on a 24 inch bike .... hEH ! gotta think about all this before destroying my trolling motor ..
 
Oh yah ! That was an "ADD TO FAVORITES" big time ! Thanks, I can see I'd be needing this sight I think, and they show several easy possibilities to change the current trolling throttle to better suit handgrip type control ... just found this DICTA one way sprocket in a junk drawer ... never used and no idea why I bought it .... maybe I can do this for just the price of a lightweight bicycle ...
 

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I made the last post, went fumbling through my junk drawer for an old prop because I wanted to note the motors shaft size and found this sprocket ... very cool, and I think it would save me tons of work .... grabs on the motor pull, slips when motor is off and if I'm peddling ... of course I mean to make this a 2 chain system just like we have on the chinese engine ...
 
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