12 HP Lansing Steam Engine From 1898: A Steamer With Four-Wheel Drive

Chain and sprocket got wheels rolling

Lansing-4-wheel-drive
The 12 HP Lansing steam engine used a chain to drive a large sprocket turning in a carrier bolted to the bottom of the boiler.  
Photograph courtesy of Jack Norbeck, author of the Encyclopedia of American Steam Traction Engines