Here is a Williams 40204 Santa Fe 4-6-4 Semi-Scale Hudson Steam Locomotive. The locomotive navigates 027 curves. The length is 19.5 and the height is 3.75. It has 6 drive wheels w/2traction tires, it is powered by a single motor, steel rimmed wheels, a electronic 6-amp reverse board, also it does have a True Blast II digital whistle and bell, die-cast operating coupler, a smoke unit, spoked drivers, die-cast trucks, wire form handrails w/grabrails. Lionel, MTH, Williams