Electric motor advice

[bungbung]

SLA = sealed lead acid batteries. Wet batteries like a bike or car are cheaper, especially from pickapart

PWM = pulse width modulation, $5 won't get you a PWM controller

On your budget, wipers motors for everything, car batteries for power.
Wiper moters generally have two coils for high and low speeds, use them.

[cheese]

well $5 won't get you far.

ok, drive, if you use two motors, you steering will be hard to control and twtichy, I'd use one motor driving one read wheel adn two front for steering, teh you don't need to worry about some kind of diff or a dolly wheel (that is assuming that you want to turn). car starter motors draw shitloads of current, any speed controller or even switch would have to be pretty heavy duty.

What kind of chair you using again?

[avgas]

Use a geared DC motor (for rotation) and 2 car starter motors to propel you.
wont last long but shit it would be fun.
likewise if you go for a 12v system you can have aux solar suppy via the $30 solar panels from supercheap autos.

[Coyote]

well $5 won't get you far.

ok, drive, if you use two motors, you steering will be hard to control and twtichy, I'd use one motor driving one read wheel adn two front for steering, teh you don't need to worry about some kind of diff or a dolly wheel (that is assuming that you want to turn). car starter motors draw shitloads of current, any speed controller or even switch would have to be pretty heavy duty.

What kind of chair you using again?

I liked the idea of 2 motors so it could steer on the spot rather than having to have some forward momentum to steer. Basically like a Segway, just not gay. Plus I was thinking the wheels could just mount onto the motor shafts rather than messing around with gears. Course, this'll probably alert people to how little I know and I'll get a paragraph saying just how wrong that idea is

If I have one wheel powering the thing it'd be more fun having the minimoto engine on board. Though that'll ruin an idea of having it inside.

Well I have the crappy $20 office chair I'm sitting on right now. Course when I have the money to do all this I could potentially get something nicer. Just brainstorming currently.

[Coyote]

Use a geared DC motor (for rotation) and 2 car starter motors to propel you.
wont last long but shit it would be fun.
likewise if you go for a 12v system you can have aux solar suppy via the $30 solar panels from supercheap autos.

That's so silly I might just have to do that.

It'll get all the ladies since it'll be 'green'.

[avgas]

mabey you should start small - how about 1 motor with wheel to do everything. like an outboard motor on a boat.
Been done before and it works quite effectively.