Chance Rides began to fabricate their narrow gauge "C. P. Huntington" locomotive in 1960. These locomotives are powered by a gasoline, diesel, propane or electric engine. The engine is powered to an automatic transmission, which controls a 90* drop down gearbox that powers drive shafts to the front and rear power trucks. Its drive wheels are not powered, but roll on the rails while fake side rods reciprocate in and out of fake cylinders. The false drive wheels have been removed by some owners for ease of maintenance. This has been the most popular park train since The Allan Herschell Company merged into Chance Industries and production of the S-24 Iron Horse train ceased. Many amusement parks are replacing their steam locomotives with these locomotives since they are easier to maintain and operate.