Here's some video of us testing our own variation of this idea. I'm not yet thrilled with how it's working out. We're not getting a lot of distance out of it.
http://www.youtube.com/watch?v=FR7ppSZ7VS0
The video shows a few different tests spliced together. I didn't edit out anything bad -- including language, thus the dumb music
-- so what you see is what we saw.
In each subsequent test, we're dialing back power to the wheels.
The details:
Input wheel -- Banebots RS550 motor through a 3:1 Versaplanetary transmission driving 2 .8" thick, green Banebots wheels.
Output wheel -- BAG Motor through a 1:1 Versaplanetary transmission driving 4 .4" thick, orange Banebots wheels.
Bottom surface -- 1/4" delrin sheet
Wall -- 1x1x.063" Aluminum tube with 1" wide urethane flat belting double-sided taped to the inside face.
Compression -- 3/4" compression, I believe.
Loader -- 6" stroke, 3/4" bore pneumatic cylinder
Angle -- 30 degrees
Exit Height -- 22"
Any thoughts?