pic: Big Bertha 3

shows the 6WD drive set up, i have no clue if having the chains on opposite corners are better then the rear or front. i decided to do the 6WD so i could get up the ramp’s peak the easiest.

Goes with this field: http://www.chiefdelphi.com/media/photos/28786

And this white paper: http://www.chiefdelphi.com/media/papers/2013?