Mecanum wheels friction coeff- will it work?

[NoahLitle]

Hey everyone,

We are currently checking out ideas for our robot's drive base and the idea of mecanum wheels came up as a main candidate.

We've been looking at videos and saw team 2848's design (http://www.youtube.com/user/SteveJes.../1/UQQ67SB8Acc).based on the wheel's specs in Andy mark, The wheel's friction coefficient is 0.7, which means that a robot using these wheels will not be able to accelerate while on the bump, since the coefficient is smaller than the necessary coefficient to accelerate on a slope of 45 degrees ((tan(45) = 1) > 0.7)) . Although our calculations indicate otherwise, It seems that 2848's drive base was able to climb the bump easily, And so, we wanted to ask whether it's us that misunderstood the problem and solved it wrong or that 2848 might have changed the wheel/carpet/bump/chassis somehow to make it easier to pass.

Thanks,
Team 3089.