Drills

Id advise against using the Mini EV at 24v, or even 18v under too much load, ive blown a couple that way. Id be very surprised if you could get anything very cheap which is that small and that light. Cobalt flight motors or brushless motors, maybe, but thatd be a costly alternative. Id go for thingaps on a BIG reduction, friction maybe, if I had the dosh (http://www.robotcombat.com/images/TG3200_series.pdf)

You might want to look at HTI Replacement motors here http://www.robotcombat.com/marketplace_motorsmisc.htmlhttp://www.robotcombat.com/marketplace_motorsmisc.html cheap, but youd have to pay the postage from the US

A few of these maybe? (three might just do) http://www.distel.co.uk/asps/details.asp?ID=38018PT18&ER=0.5475&CY=USD&AP=32.88http://www.distel.co.uk/asps/details...Y=USD&AP=32.88

they may well do, the main problem is the height although i may jst say sod it and forget about making it invertable then

http://www.distel.co.uk/asps/details1.asp?ID=LJ14http://www.distel.co.uk/asps/details1.asp?ID=LJ14

something like this but a bit bigger would be ideal

Julian, those are the ones we use. We remade the gearbox and its smaller than the 18V ones and fits entirely inside the wheel.

the mini ev works at 24v with enough reduction. plan b runs them at 24v with a 34:1 reduction on the drive.

theres a drumbot on the way thats got a drum powered by 2x mini evs so ill let you now how it goes.

Silly Question:

Ive seen a lot of FWs with the entire drill used as the motor. Is this really nessesary ? I dont know if you can use the motor right out of the drill and attach to your wheels, or whether is has to run through a transmission

Gray, i dont think that those pancake motors, even with many of them will be upto the job. Have you looked at using bevel gears or somethong along that line to be abl;e to use the motor on its side and so use a larger motors.

i dont think so either.

I havent but as i said earlier my main problem is weight (then again when is it ever not a problem!)

i believe you said you needed a motor 5cm tall or so?

how about one of these fan motors -

http://www.robowars.org/forum/album_pic.php?pic_id=538http://www.robowars.org/forum/album_pic.php?pic_id=538

there from mitsubishi TR magnas if youve got those out your way.

they are extremely flat at like 20-30mm tall and have ridiculous power at 24v. they spin a 1.7kg disk up to 4000rpm or so quite nicely in about 5 seconds tops. there a type of thingap motor in there design. only about 700g in weight.

david - yes you do have to run them through a reduction of some form. the drill is just easier to use. nothing stopping you from running it through a belt or chain drive but if you mean can you attach a wheels straight to the motor shaft then no... they wont have enough torque to move a feather.