High powered brushless electric scooter

Electric scooter modified to accept a 4000 watt brushless electric hobby motor.
The scooter was originally a 300 watt 24 volt model with 2 x 12 volt 12 amp sealed lead acid batteries. It weighed 24 kilograms and accelerated very sluggishly. I stripped it back and started from scratch. The new motor was then bolted on with the help of a custom made aluminium bracket and testing has begun. The scooter has crazy acceleration and will easily pull a 90 KG man up a steep hill at 25 kph with ease.

Current specs:

14.8 volts
25 kph
21 wh per kilometer
10 km range

Turnigy 63-74 200kv Brushless Outrunner from Hobbyking
3 x 5000 mah 20c 4 cell Turnigy Lipo batteries from Hobbyking
Hobbyking SS Series 190-200A ESC from Hobbyking
Turnigy servo tester from Hobbyking modified to accept hall effect style handlebar accelerator
11 tooth sprocket from ebay
Turnigy wattmeter from Hobbyking
BEC From Hobbyking

Category:

Howto & Style

Tags:

• electric
• scooter
• diy
• turnigy
• brushless
• motor
• hobbyking
• Lipo
• outrunner
• e-bike
• ebike

[amr47p]

The no load amp draw is about right with the motor no load current, windage and chain drive losses. I wouldn't want to loose the freewheeling capability cause it saves alot of power going down hills as the motor has heaps of cogging. Plus if you run out of juice you can just kick it like a normal scooter. Ive blown the motor since then and have upgraded to a larger scooter and a larger Turnigy 80-100 motor. I will post a vid soon.

[poweruser69]

check out my scooter. i have since changed the esc but still the same motor and the same gears. my son rides it and he weighs about 125lb.

[poweruser69]

my question is how did you modifiy the servo tester to accept the hall switch twist throttle(ching chong version)? Does the potensiometer in the servo tester have hall desing or just resistive?

[rapidotorpedo]

hey man how did u get that sprocket onto that motor ?

[MaxSachs]

The no-load amp draw is rather high for such a small wheel, is it running near it's most efficient operating RPM's? You can increase the gear ratio by using the 90T currie rear sprocket, get it up to 8.2:1 instead of the 7.28:1 you have now, yeah you'll loose the freewheeling capability but the amp draw should be reduced.