RE: Giant rc tank
most of these are elec. not gas.
and they are geared very low they can pull a real car.
look it up on youtube they are all over the place and range from $6000 to over $20,000
if you ask me i would build a R/C 1/4 monster truck.
just build a full size r/c go cart.
thats what i plan to do with 1/4 radio and servos...
that would be nutz an r/c go cart haha