A track-laying shuttle car

The shuttle car was developed to meet the demand for rapid transportation of coal from the working face to the secondary haulage system in the mine. Rubber-tired cars generally have been used, but certain limitations pointed to the desirability of a track-laying vehicle. Such a car was designed, with electric drive and an electrohydraulic control system. Nearly 3 years of operating experience indicate that the design is fundamentally sound and that this type of vehicle has a definite place in mining operations.