Will it ride??

[Ramen1]

I guys, this is my first post, and I'm very glad that i found this forum, lots of experts in.
I have an electric bike that i bought from a friend. The batteries were dead, sou i manage to get some 4 SLA 12v 7Ah (24v 14Ah) to replace them.
It have a a small and weak motor (250W brushed motor).
http://www.facebook.com/photo.php?pid=4418174&l=42c98a1973&id=638633440
Now I was planing to replace it with a brushless RC motor.
I don't want something as big and expensive as the Turnigy 80-100-B 130Kv. I just want something that can take me at 25-35 km/h and a good range.

First question:
Will this motor do the job??
TURNIGY 50-65D 270kv http://www.hobbycity.com/hobbyking/store/uh_viewItem.asp?idProduct=5204

Second question:
Can i run a motor like this with my SLA batteries?

Thanks in advance guys

 

[steveo]

that motor should work if you gear it right...

good luck with building a custom drive for it.

-steveo

 

[torker]

Yea it won't be a direct replacement. It has a lot higher rpm per volt so you would have to build/buy a gear reduction. Some of the rc builds/threads have good info. Also might search for Curry or mid-drive.

 

[Ramen1]

Thank you guys for your input.
What about the SLA batteries? WIll they work?
I'n the future i'm planing to buy 1 or 2 6 cell 5000mAh lipo, but for now i don't have enough money

 

[steveo]

Thank you guys for your input.
What about the SLA batteries? WIll they work?
I'n the future i'm planing to buy 1 or 2 6 cell 5000mAh lipo, but for now i don't have enough money

sla batteries will work

-steveo

 

[kfong]

The easiest thing to do is to find a motor with the same KV as the current one. Then tear apart the current motor for the front housing to be used as a mounting bracket for your RC motor. Having to create a second gear stage will just complicate your build.

 

[AussieRider]

Don't forget to factor in the replacement controller. RC motors are brushless. If you're on a budget, perhaps you should look for a more powerful brushed motor & cheaper controller that matches the power. You might even find one that just bolts in. A lot of motors use the same casing & mounting pattern.

 

[Ramen1]

I was looking at the Hobbyking SS Series 90-100A ESC for controller, is cheap ($25) and can handle more than enough amps.
For throttle i'm planing to use a servo tester.

Thank you guys

 

[dontsendbubbamail]

I was looking at the Hobbyking SS Series 90-100A ESC for controller, is cheap ($25) and can handle more than enough amps.
For throttle i'm planing to use a servo tester.

Thank you guys

I would go with at least the TGY AerodriveXp SK Series 63-74 170Kv / 3250W or the 80-100 for a motor. You will be better off with some reserve power and and a lower kv. Only the CC rc controlleres have been proven to work in an ebike application. You will be just wasting you money on the Hobby King esc.

Bubba