[EricH]

Originally Posted by Ari423

All robot movements must be powered by internal combustion engines!

Can you imagine building a small internal combustion engine for every motor on your robot? The robot would weigh 1000 lbs. Sounds like torture.

Actually, I don't think so. Try the R/C aircraft (or R/C car) shop nearest you--they might have some nitromethane engines (or diesel engines). Ah, the smell of nitromethane in the morning... I think I could easily find a few dozen engines and mufflers and come in under 50 lbs.

Unfortunately, starting those things can be a tad tricky... stand back... and they only spin one direction, so you'll need to gear 'em.