Homemade RC Car fast with two brushless outrunner motors with A123 batteries

This was a homemade RC car that was made out of parts for a 15lb combat robot. It has a left and right motor that consist of 1130 kv 350 watt brushless outrunner motors. The battery pack is a 4s A123 pack and the ESC's are two Mamba Max controllers. The gear reduction is basically a friction drive with some springs on the wheels to help push them into the motor shaft, approximately a 7:1 ratio. The car has unlimited amounts of power and can be charged within 15 minutes. The frame is made of wood and the bearings are simple holes with paste wax. The front of the car is made of k'nex pieces. Please ask if you have any questions.

During the video, the car was never at full throttle, as that would just do a burnout, as it could spin the tires easily at 20-30mph, of course having 700 watts help.

**Edit** 2000 views :) Thanks for watching!!!!

Category:

Science & Technology

Tags:

• RC
• car
• brushless
• motors
• himax
• 350
• watts

[stomp199]

would a plane set up work in my hsp xstr 1 /10 scale relplay fast plz

[MrPizzaman09]

@stomp199 I have no idea. Most plane controllers are only one way, not reversible.....

[zzxcrozzy]

I'm just wondering if I can change to a bigger motor with the same radio controller system, without burn the radio thingy. The battery is the same :) Please answer someone

[MrPizzaman09]

@zzxcrozzy Well, the "RC" part with the receiver wires will stay the same. If you are using the same controller and battery, then things should be ok. The larger motor will pull more power, causing your esc + batteries to work harder. You basically need to make sure your controller isn't getting too hot.  If you have a castle creation's controller, you can set the values on your computer so it automatically shuts off. If you do get a bigger motor, take it easy so you can check the temp.

[littlesten]

my ansmann are to goes 70MPH at the min :) and ive spent under £200 :)

[MrPizzaman09]

I meant E-revo, they can be had for $650 with some stock batteries and radio.

[MrPizzaman09]

You can have fun with less power, definitely. The parts in it probably cost about $600-700, so I would choose some different parts or just go out and buy a pre-made one for $700 = E-Maxx with the MM.

[christiaan12nl]

i have made a knex rc car too but my car is not fast :P (to much power)

[MrPizzaman09]

Yeah, A123 is LiPO4, and these are the real deal, not the cheap Chinese knock offs.