Video: All-Wheel-Drive Is Not Just for Cars, as Steam Locomotives Used It, Too

All-wheel-drive works for more than just cars and trucks, as it can also benefit steam engines as well.

Meet the Shay Locomotive. In place of a direct drive, the Shay used a car-like system of steam-powered cylinders and a driveshaft that sent the locomotive’s full power to all of its wheels, giving it the necessary extra grit to handle steep mountain railroads.

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