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

[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.

[christiaan12nl]

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

[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.

[MrPizzaman09]

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

[MrPizzaman09]

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

[MrPizzaman09]

I saw a video of a guy who built a electric scooter with a large 2000 watt brushless airplane motor and about 40 A123 cells. It was way too much power. I have a gas scooter that is only 1/3 hp, which the performance is kinda of slow.

[MrPizzaman09]

The car weighed about 8 pounds, way more than most rc cars. A previous version of the car was direct drive and could easily hit 50mph and do wheelies at 30 mph.

[MrPizzaman09]

Thats right. If you pushed the wheels down hard enough, the car would push you over. If you punched the throttle at any speed, the wheels would start peeling out. I had two Mamba Max controllers and 4 A123 batteries, which could supply 70 amps at 14 volts for 2 minutes. These were part of my 15lb combat robot, which IS still the most powerful 15lb robot ever made. The weapon motor put out more than 4 hp (3000 watts). This is serious stuff dude.

[kathiaIDavila]

get sum close up's of the car , i wana c how u made the transmission/drive train/ how u connect the motor to spin the wheels

[MrPizzaman09]

The car was taken apart about a year ago. Basically the tire was on a dead axel that slided on two nails with springs, which pushed the tires up against the motor shaft. It worked ok, but then again it was easy to build.