pic: Team 2980 Open Source Robot

[Nuttyman54]

Originally Posted by Jeffy

Is this a joke?

If not,
The angle compared to the direction of gravity is the defining factor for friction via normal force.

If so, you got me.

I believe he's not talking about friction, but about the vertex that sticks out at each rung level. He is correct that those vertices (which is 90 degrees projected in the ground plane) is larger than 90 degrees in the the plane normal to the corner poles.

That being said, I don't think this design relies on the corners being 90 degrees, they simply chose 90 as their angle between the climbing wheels. They should roll over the vertices regardless.