1000Knives wrote:
swbluto wrote:
My customized, suped-up electric scooter. Custom electronics and batteries make it go about 40 mph top speed, and 30 mph up relatively steep hills. Has a range of about 20 miles.

I also have a bunch of LiPo batteries that go under the deck of the scooter, so that the large ugly battery you see in the picture doesn't have to be there leaving the entire deck free for standing.
That said, most of the time, I walk around for the much needed exercise and use the bus for longer distances. But, the scooter is definitely my favorite mode of transport.
That's pretty sweet. Lipos you say? That must have cost a fair amount. Mind giving some more details?
The original weak-ass motor was replaced with an RC airplane motor that's capable of sustaining 5 kW (Or roughly 7 HP) for upto a minute or 3 kW continuously.
http://www.hobbyking.com/hobbyking/stor ... 5240_.html
I used PVC tubing and a steel plate to house the motor so that I could attach it to the scooter using the scooter's metal straps.
The battery you see in the picture is a LiFePO4 battery from ping.
http://www.pingbattery.com/servlet/the- ... ium/Detail
The LiPo batteries I got from hobby-city and they cost about $300 in total. With these batteries, the scooter is capable of 40 mph flat-land / 30 mph up hills and it runs at 48 volts.
I have the 20C version of these batteries:
http://hobbyking.com/hobbycity/store/__ ... P_40C.html
The motor is ran using a specialized ESC (or "Electronic Speed Controller") from Castle Creations called the Phoenix-85. I personally would advise a higher amp-rated controller unless you *really* know what you're doing (Like the HV-140), otherwise, you risk blowing the controller if you're stretching its limits.
http://www.castlecreations.com/products ... eries.html
There's a throttle converter between the throttle and the ESC that lets the throttle "talk" to the ESC. I also added on custom current-limiting along with speed control and acceleration ramping so that the scooter doesn't flip you off like a Bronco, which is pretty easy when you have 7 *electric* horsepower on tap. (Electric has tons of torque)
And the electronic device you see dangling was a custom LCD display that I created to
check the temperature of the motor and batteries, speed, voltage, battery capacity left, energy used and other important information.
All in all, the entire scooter plus batteries cost about $700.