Abstract
We developed a model running facility to study the flow of the under floor of railway car because the flow is a main cause of ballast flying phenomena and snow accretion. The facility was set up in the test section of the Towing Wind Tunnel Facility where we can eliminate disturbances, such as natural wind by a hood. By using an automobile for the propulsion of the model train, we can make it start, run, and stop without complex, large and expensive apparatus. The model train runs smoothly on the rails because it is tracked with wire ropes.
