Tags: Locomotive.
The PRR S1 class steam locomotive (nicknamed The Big Engine) was a single experimental locomotive the longest and heaviest rigid frame reciprocating steam locomotive ever built. The streamlined Art Deco styled shell of the locomotive was designed by Raymond Loewy.The S1 was the only locomotive ever built with a 6-4-4-6 wheel arrangement. It was a duplex locomotive meaning that it had two pairs of cylinders each driving two pairs of driving wheels.
