The Michigan AuSable Valley Railroad Take a ride on this scenic railroad, into a 115-foot long tunnel, over two wooden trestles and through the woods enjoying a variety of scenes and terrain. This one-quarter-scale railroad operating on 16-inch track in Fairview, Michigan was designed and built by Howard Schrader. Motive power for the 1.5 mile mainline is a twin set of F-7 diesels, powered by a Perkins 80 horsepower four-cylinder diesel engine. Hydraulic motors in each of the four trucks provide power to all 16 wheels on the two units. A 4-6-4 27-foot long steam locomotive also runs the tracks. The 4-6-4 Hudson is oil-fired and has 20-inch drivers capable of pulling 10 or more cars carrying about 120 people. 46 minutes of fun visiting this remarkable little railroad. Minimal narration.