Middle weight motors

hi im a new roboteer and looking to build a middle weight bot. I was thinking of using two electric scooter motors (which these are already geared and have full transmission to the wheels) has anyone used these, if so could you give me there

good points
and the bad points

thanks
billy

have you got any pictures of them?

hi there gary,

i havent got them yet, having a look at my mates, they must be alright if they can make an adult go up 15mph (well so the box says lol)

i have seen these scooters in action. i weight 100kg (ish) and having ridden a very good one, i think you are JUST ABOUT able to use them. it will be right on the edge as far as performance goes, you are getting near the bottom end of what i would say is useful power/speed. these would make brilliant featherweight drive, but middleweight... i wouldnt.

but then, if you can double the gear ratio and overvolt them 100%, maybe this is getting reasonable results? i imagine youd get good performance in this situation, but life expectancy would be an unknown.

hope this helps

William, to be honest I think you would be better looking at motors around the 400w to 750w range. In the middleweight typhoon we used 2 750w iskra motors and they were more than adequate for our needs.

if you need gearboxes as well? try finding scrap mobility scooters (like the ones you see in asda) or small elecric wheelchair motors?

another option, start with a featherweight, and move up to middleweights later?

thanks for the help guys, much needed

does anyone know where to buy second hand wheel chair motors with gear boxes attached?

ta
billy

would these wheel chair motors be the best to use, (im trying to get a motor which has already the gear box on it, and even better if the transmission is there also)

ta
billy

Gearbox and transmission is thesame for us.

Unless you want to go Firestorm, with a single motor and a differential( keep in mind that Firestorm had 1 large and 2 small motors)

Also, I think the Speed 900 motors can drive a middle. If you use 4 of m. Each do easely 320W on 24V. If 259 in heavy config could drive on 4 simular motors....