pic: Team 935 Chassis Teaser

[keericks]

Originally Posted by gyaniv

You might be right... Though it doesn't seems so because the holes in the chassis for the bearings looks like they are in one line, and that both wheels are 8"... but hard to judge from this pic...
I heard of some times having trouble getting over the bump with regular mecanum wheel, since their robot slipped because the wheels didn't have enough traction.. so If it is what they did then it's a great idea, though even one wheel will be enough to help the mecanum climb over the ramp.
I would love to see a team "Reforging" a mecanum wheel and putting wedgetop tread on the small wheels

Actually, if you look closer, the centerline (CL) for the bearings are not in a line. Look at the horizonal "web" frame structure going through the mec wheel bearing CL ... now follow it over to the first traction wheel. Notice the jog in the frame structure upward, and that new web centerline passes through the two center traction wheels, confirming the earlier post of high centered traction wheels for bump assist. Cool design.