Electric Race Bike for EVolocity Competition

[hewittwill]

Hi all,

I've been part of a team designing and building an electric bike to enter in the EVolocity competition in New Zealand, which is basically an electric motorsport event. We are part of the highschool category using a standard motor and batteries to design and build the best electric bike for four races, a 110m drag race, a 10km economy run, a "street circuit" slalom and a rolling resistance test. We would love you guys to give us some input for the final stages of our build, any tweaks, changes etc that you could recommend would be awesome!

Here's a photo of the bike in action:



You can check out some more photos / videos on our facebook page: facebook.com/teamxpeed and if you could give us a like while you're there that would be awesome!

Let us know what you think of it,
Cheers,
Will

 

[e-beach]

Looks like you put a lot of work in your bike.

Love the look of the bike. Rock hard air pressure in you tires is a good thing for the categories stated. Steering dampeners for high speed control could be useful although not used around here much. Small frame for weight saving is good.

I have a couple of questions though....

1: What motor is that you are using and why did you choose it.

2: What type of battery are you using and why?

OOPs......that's 4 questions.....Blame it on my A.D.D. :wink:

Good luck on your event!

:lol:

 

[hewittwill]

Hi there,

Its a cheap chinese motor rated for 400W! We have to use it as part of the competition, the idea being the team with the most money to buy an expensive motor wi. However so far we've managed to crank a few horsepower out of it MORE than its rated for :wink:

The batteries are the tall 12v 18Ah variety, we had to use them again to try and stop it being money based.

Cheers,
Will

 

[e-beach]

Looks like you are doing fine. The one thing that might help is a light weight fairing for when you need to cut wind resistance. Removable for when you don't.

After that then it is all about how you ride in the competition. Test to see if you can very-very slowly, so not to burn many watts, ramp up to full speed and then releasing the throttle coasting to an near standstill.......... and the repeating the process over and over will increase your range over just riding slowly.
That technique has worked for others.

The one other thing I can think of is to make sure that all of your wiring harness is robust enough to allow for minimum resistance while riding. I think you posted something like .01Ω at the controller.

Good work!