Few locomotives made a public debut and statement like the Pennsylvania's "Big Engine" - the S1. Unveiled at the 1939 World's Fair, No. 6100 ran under its own power before crowds on a special bed of rollers.

The PRR S1 class steam locomotive (nicknamed "The Big Engine") was a single experimental duplex locomotive of the Pennsylvania Railroad. It was designed to demonstrate the advantages of duplex drives espoused by Baldwin Chief Engineer Ralph P. Johnson.

The all-new, scale-sized Lionel Pennsylvania S1 6-4-4-6 Duplex features many separately-applied detailed parts such as an opening cab roof hatch, see-through vents, accurate builder's plates and interchangeable front name plates.

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Nov 17, 2020 · Nicknamed "The Big Engine," the S1 was the longest reciprocating steam locomotive ever (just over 140 ft); it was too big for many PRR curves. Along with wheel slippage, this limited the S1's usefulness.

Dec 24, 2023 · PRR #6100 made its first test run eighty-five years ago today. The class S1 6-4-4-6 duplex had to run in reverse all the way to Huntingdon , PA (35 miles), because Altoona had no turntable large enough to turn her. She then ran forward to …

Jul 5, 2018 · The PRR S1 was a unique duplex locomotive that utilized a 6-4-4-6 wheel arrangement. A six-wheel leading truck with 36 in (.91 m) wheels was positioned at the front of the engine. A set of four 84 in (2.13 m) drive wheels followed, trailed by …

Owing to its length (8 feet longer than the Big Boy and built on a non-articulated frame) the S1 was limited to service west of Crestline Ohio. Designed for operation in excess of 100 mph, there are unsubstantiated reports of the engine exceeding 150 …

Lionel 2131040 Pennsylvania LEGACY S1 6-4-4-6 6100 Tuscan Red Few locomotives made a public debut and statement like the Pennsylvania's _Big Engine_ - the S1. Unveiled at the 1939 World's Fair, No. 6100 ran under its own power before crowds on a special bed of rollers.

One of the most famous locomotives to be built at the PRR shops is Pennsylvania Railroad’s only member of the S1 class, #6100. It had a short but interesting life! It’s a story railfans still talk about. #6100 pulls out of Union Station in Chicago with the Manhattan Limited in February 1943.