Ewing System

[1][dead link‍] In the Ewing System the main wheels of the train run on a single steel rail.

Steel rail can carry more load with less rolling friction than any other mode of ground transport.

The turning radius of the train is restricted by the difference in length or distance traveled between the inside and outside rails due to curve resistance.

If the outer wheels fail to maintain or reach the required speed, the train may derail.

The balancing wheel on the road carried only 4% or 5% of the load, it did not subtract much from the steel wheel-steel rail efficiency.