Gearing for 20 FPS?

[HammadB]

How I reached it AndyMark Shifters (standard gearing) with two CIMs per side, fed through a 12:22 sprocket reduction to an 8" FIRST wheel gives a top-gear speed of 19.64 FPS after accounting for losses--close enough. With a total weight (including battery and bumpers) of 100 pounds on the driven wheels, you'd be facing a worst-case drivetrain current of 148 amps...but once you got in motion, you'd likely dip back below the all-important 120A of the breaker before it tripped. If you wanted to be super-paranoid--nothing wrong with that--then keep the weight on the driven wheels at 80 pounds or below.

I'm no physics buff, and could be wrong, but wouldn't this have a pretty slow acceleration?