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See all on WikipediaPennsylvania Railroad class S1 - Wikipedia
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 streamlined Art Deco styled shell of the … See more
As early as June 1936, the management of Pennsylvania Railroad decided to build a new passenger locomotive to replace its aging K4s locomotives. They also hoped that the new S1 steam locomotive would have a … See more
The S1 was the largest passenger locomotive ever constructed, and the cast steel locomotive bed plate made by General Steel Castings was … See more
The cost of the S1 was $669,780.00, equal to $15,140,553 today, which was over twice the cost of a PRR T1 4-4-4-4 (#6111 cost … See more
The S1 began its passenger train services starting from December 1940, on the run between Chicago and Pittsburgh. On its first run out of Fort … See more
The benefits of a duplex design included lighter machinery, shorter cylinder stroke, less wear, lower piston thrust, smaller more efficient cylinders, and a more stable frame than an … See more
The boiler for the S1 was the largest built by the Pennsylvania Railroad; with 660 square feet (61 m ) of direct heating surface and 500 one-inch diameter tubes, the total heating surface area of S1 was 7,746 square feet (719.6 m ); it was 99.3% as massive as the … See more
The S1 was displayed at the 1939 New York World's Fair with the lettering "American Railroads" rather than "Pennsylvania Railroad", as 27 eastern railroads had one … See more
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Pennsylvania Railroad 6-4-4-6 S1 Locomotive | Old
Jul 5, 2018 · The S1 was a unique and powerful steam engine that ran on coal and could reach 60 mph. Learn about its design, performance, and legacy as …
- Estimated Reading Time: 9 mins
PRR's Duplex Engines S1 (6-4-4-6) and T1 (4-4-4-4) - Blogger
Nov 17, 2020 · Learn about the experimental and production duplex locomotives of the Pennsylvania Railroad, designed for fast and powerful passenger service. See photos of S1 (6 …
- Estimated Reading Time: 9 mins
Pennsylvania No. 6100 | Locomotive Wiki | Fandom
Learn about the Pennsylvania Railroad Class S1, the longest and heaviest steam locomotive ever built with a 6-4-4-6 wheel arrangement. Find out its history, desig…
- The Pennsylvania Railroad Class S1 steam locomotive (nicknamed "The Big Engine") was a sin…
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. Unlike similar-looking articulated locomotive designs, the driven wheelbase of the S1 was rigid. …
- The Pennsylvania Railroad Class S1 steam locomotive (nicknamed "The Big Engine") was a sin…
Pennsylvania Railroad S-1 | The Online Automotive ... - Hemmings
Sep 23, 2018 · The S-1 was a massive and powerful duplex engine that could haul 1,000 tons at 100 MPH. It was built in 1939 by PRR and designed by Raymond Loewy, but it had problems …
Pennsylvania Railroad's #6100, The Only 6-4-4-6!
Learn about the history and features of the PRR's only member of the S1 class, a streamlined 6-4-4-6 locomotive that could reach 100 mph. See photos, technical specs, and how it was used for passenger service and World's Fair display.
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Crestline PRR Engine Facility Duplex and Experimentals
The first experimental duplex on the PRR was the S1, a huge rigid frame duplex locomotive of the 6-4-4-6 wheel arrangement. This engine was over 146' long! This locomotive was built by the …
Duplex locomotive - Wikipedia
The Pennsylvania Railroad's S1 was a 6-4-4-6 duplex locomotive designed to operate a 1,200 short tons train at 100 mph. It was the largest passenger steam locomotive ever built, but had problems with wheelslip and surging and was …
Pictures of PRR 6100
Jan 10, 2025 · Here is an image of an official photo that was taken in Altoona, Pennsylvania, in 1939. Shown here in the Pennsylvania Railroad's Erecting & Machine Shop is engine #6100, …
PRR S1 by Alexander - O Gauge Railroading On Line Forum
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 …
