2 wheel drive e-BMX

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Ypedal   100 GW

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2 wheel drive e-BMX

Post by Ypedal » Mar 23 2013 3:59pm

awd-bmx-1.JPG
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Been working on this for a few days as time allows, the BMX already had a 9C motor on the back and after repairing a 2nd motor and having sit on the floor next to the bmx for a few days... it was obvious what had to happen next !..

I found 2 ecrazyman controllers in a box i got back in 2008, 72v 30 amp, am using one throttle for both controllers.. all fed from the same lipo pack in my backpack.

Just got back form test ride no.1 , will tidy up the wires once the mandatory first few rides are successful..

How was it ?.. you might ask...

Well, below 20 kph the front tire will break look if you snap the throttle, :twisted: , way fun, but off road this thing should be a blast !... dangerous.. but a blast ! lol..

going to remove the pedals and crank, then weld up some foot pegs. my stash of 10ah PSI cells may end up on this bike..the 5ah pack of duds is not up to the job..
ES site status page:
http://www.ypedal.com/ES/ES.htm
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Ypedal   100 GW

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Re: 2 wheel drive e-BMX

Post by Ypedal » Mar 23 2013 4:01pm

Dual torque arms, one on each side... dont want that front wheel getting free..
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ES site status page:
http://www.ypedal.com/ES/ES.htm
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spinningmagnets   100 GW

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Re: 2 wheel drive e-BMX

Post by spinningmagnets » Mar 23 2013 4:21pm

Extend the rear farther back? Looks fun!

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knoxie   10 MW

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Re: 2 wheel drive e-BMX

Post by knoxie » Mar 23 2013 8:02pm

awesomness :mrgreen:
Electric KMX 72V Lipo, USPD drive unit. BMX 72V, Puma BMC,
Raleigh 26 inch MTB Puma 50V Turnigy 25C Lipo 10AH, Trek MTB, X5 48V NIMH. Electric BMX
http://tinyurl.com/4vrmc8 http://tinyurl.com/3umm4n

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neptronix   100 GW

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Re: 2 wheel drive e-BMX

Post by neptronix » Mar 23 2013 8:08pm

ypedal you're nuts :mrgreen:

It's kinda cool though cuz you can throw it in the back of your car whenever ya like, and it ain't a flimsy folding bike, it will take the abuse.

I think you're crazy but at the same time i want to do the same exact thing.... :lol:
Efficiency is everything :bolt:

My first major build: 1.6kW 8T MAC motor on a Trek 4500.
The new all-arounder: Leafmotor 1500w @ 4kW on a Turner O2 full suspension.
The monster scooter: 20" eZee on a Cannondale Semi Recumbent.
Whipper-snapper: ? on a lightweight BikeE Semi Recumbent

davec   1 kW

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Re: 2 wheel drive e-BMX

Post by davec » Mar 23 2013 10:13pm

go up a hill and tell us how it handles- and if the motors are still cool after the climb

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mikebikerad   1 kW

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Re: 2 wheel drive e-BMX

Post by mikebikerad » Mar 24 2013 3:36am

Nice! It is funny when the hub motors on a bike outweigh the bike they are added to.

My buddy used a single hobbyking SK outrunner friction drive on his BMX and it almost takes a 48 volt Optibike.....I bet your bmx would eat optibikes for breakfast :D


xadmx   1 kW

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Re: 2 wheel drive e-BMX

Post by xadmx » Mar 24 2013 6:23am

:D :D :D we need some vids.
adam

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Ypedal   100 GW

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Re: 2 wheel drive e-BMX

Post by Ypedal » Mar 24 2013 6:43am

.I bet your bmx would eat optibikes for breakfast
Lol.. it had better, since i'm running 72v 60 amps total so far ( 30 amps per motor )

I need to solder up the shunt on the rear wheel controller so that it pushes harder and helps reduce front wheel spin.. :P .. more on that later.

video, should be able to have something by tomorrow. 8)
ES site status page:
http://www.ypedal.com/ES/ES.htm
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