Fun project for an old fuddy-duddy

eljimbo

eljimbo

100 µW
Joined
Jul 28, 2024
Messages
7
Location
Hawaii
This was a 'Goodwill' 50 dollar special beach cruiser, I had been waiting for a few months for a suitable frame to start with and got lucky. The rear hub is an Ali-express kit (500 watt hub, all the switches and stuff, lots of waiting for them to get the right parts together) The batteries are from Remington brand chainsaw/lawnmower/ weed whacker/whatever. Here is Hawaii and sometimes things get stuck here because of our remote location. I have about 20 of these brand new 4 aH 36 V Lipos. They had sat unused in brand new power tools too long and the LVC circuit wouldn't let them be charged. I got a lot of stuff for a little bit of money and planned this bike. Of course the batteries were all perfect. I am an RC plane geek and know most of the magic associated with LIPOs.
Anyway, the bike is great. About a year of cruising to the beach with boogie boards attached (she has an "Townie Electra-"... no problems. My question to you is what is this motor? "KunTeng" who makes it?, If it takes a crap can I fix it? General advice ..center kick stands are a bad Idea with rear rack mounter battery packs)
Aloha Jimbo


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The small hubmotors are pretty cheap, like $160 shipped out of China if you need a spare. If you push them til they get too hot to touch, the nylon reduction gears melt over time. If you get them really hot, the connector melts. I've never had one fail.
 
If a 'sensored' hub drive and the hall sensors give up you can exchange them, and rewire the motor if the feed flex gets damaged/shorted.. but if you push too many amps into it under load you could melt the nylon gears or kill a coil, nether of which are user solvable.. So what controller is used and how hard are you working your motor? if running with a 20-22a peak power controller you should be fine, any more however and you may want to start looking at temperature monitoring and cooling options too.

Sand is probably your worst enemy tho so a slide hammer for pulling bearings might be useful down the rd..

V Nice build/bike btw..
 
And i was quite taken with the 'hobby horse' aesthetic.. a novel approach.. especially with no foot board.
 
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