Just two wheels and a trailer

[rjohnson]

Arguably, discussion on wheels has been the most common topic this year. After reading many posts on this topic, I have not seen anyone talk about what I am about to propose.

I am thinking that you could use just two wheels on the robot with an axis parallel to the axis of the trailer and somewhat centered front to back. From what I understand the tongue is pretty rigid and would allow to trailer to act as the other balancing wheels. This configuration would allow for greater turning capabilities and virtually all the weight of the robot would be over the wheels (assuming if was placed close to the center of gravity of the robot) for maximum traction. The official drawings say that the tongue itself is aluminum and the tongue accessories are made of steel. I don't think this would put too much stress on the tongue as most of the weight would be centered on the robot wheels.

Please anyone share their thoughts concerning the viability of the design or other advantages/disadvantages that I have not considered.