07-18-2017, 03:53 PM
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#41 (permalink)
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Master EcoModder
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One might be able to replace the plastic gears with metal ones at some point. The NY Finger Lakes are beautiful too. In hilly country having the option of dynamic braking is worth considering.
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07-18-2017, 05:41 PM
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#42 (permalink)
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Cyborg ECU
Join Date: Mar 2011
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Yes, the planetary gears inside these motors can be replaced/upgraded. Lyen makes a hardened steel sprocket for hub motors. 25 bucks each. We would need three.
LYEN Controllers
And here is a guy who experimented with installing them on his trike:
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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07-18-2017, 11:09 PM
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#43 (permalink)
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Master EcoModder
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Finished build:
Pretty stealth! And, I was expecting the geared motor to be louder than it is. It's not entirely silent, but very close.
Total time of assembly was around 2 hours, mostly due to having to solder together a harness to connect my 3 batteries in parallel, and having to run to the local bike store after popping a tube because I forgot to move the rubber liner that covers the spoke holes in the rim, to the new rim.
Acceleration is pretty similar to a 50cc scooter, and top speed appears to be around 20mph. With a 115lb rider, it's entirely unnecessary to pedal even up the steepest hills.
This hub motor does indeed freewheel, and very well at that. There's virtually no drag.
I can probably get a smaller bag. The 13.2ah of batteries take up about this much space:
Last edited by Ecky; 07-20-2017 at 12:00 PM..
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07-19-2017, 11:00 AM
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#44 (permalink)
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Cyborg ECU
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Real stealth!
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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07-20-2017, 11:44 AM
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#45 (permalink)
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Thalmaturge
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Quote:
Originally Posted by Ecky
I can probably get a smaller bag. The 13.2kWh of batteries take up about this much space:
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Surely you must mean 13.2 ah of batteries?
I've got a 36V Bafang BBS02 and 8 ah of lithium and a 7-speed rear cassette... in 1st gear the acceleration is nuts, but it tops out around 13-14mph. In 7th, the acceleration is acceptable, but the motor's getting worked pretty hard. I usually do 4th or 5th for top speed (around 28 mph level ground no pedaling).
If I just use it for tough hill climbs, it's good for 50 miles If I don't pedal and just mash the throttle all the way, it'd probably only last about 8 miles.
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07-20-2017, 12:01 PM
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#46 (permalink)
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Master EcoModder
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Fixed! Was very tired when I typed that.
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07-20-2017, 02:24 PM
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#47 (permalink)
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Cyborg ECU
Join Date: Mar 2011
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Instead of a smaller bag, make a separator to wall off the battery and use the residual space inside the bag for some storage.
__________________
See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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07-21-2017, 10:43 AM
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#48 (permalink)
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Master EcoModder
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If you are interested we can discuss aero drag reduction techniques.
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07-21-2017, 01:55 PM
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#50 (permalink)
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Cyborg ECU
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Those are cool, Ecky. From what I have read wheel covers or deep dish designs need to make an even plan with the outter edge of the tire, if possible, for best effectiveness.
__________________
See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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