Pennsylvania railroad class k4s – wikipedia electricity for kids


The K4s was designed under the supervision of PRR Chief of Motive Power J.T. Wallis, assisted by Chief Mechanical Engineer Alfred W. Gibbs and Mechanical Engineer Axel Vogt, as one of a pair of classes with the L1s 2-8-2 "Mikado", sharing a boiler and other features. Some inspiration came from the large experimental K29s Pacific built in 1911 by the American Locomotive Company. Also influential was Gibbs’ design for the successful E6 4-4-2 "Atlantics", from which the K4s inherited its heat-treated, lightweight machinery, its cast-steel KW trailing truck, and much of its appearance.

The K4s design increased grate area from previous classes’ 55 to 70 sq ft (5.1 to 6.5 m 2). The boiler barrel was fatter than previous classes, and the increase in heating surface and boiler size gave the class good steam-generating capability. Equipment on the prototype, built in 1914, was conservative and included a screw reverse ( power reverse would soon be added), a small 70-P-70 tender holding only 7,000 US gallons (26,000 l) of water and 12½ tons of coal set up for hand firing, a wooden cowcatcher pilot, a square-cased, old-fashioned headlight and piston tailrods (soon to go).

The K4s design was successful enough that it influenced other locomotive designs, and not only those of other PRR locomotives. London and North Eastern Railway Chief Mechanical Engineer Nigel Gresley incorporated much of the boiler design (including the tapered shape) into his famous Class A1 Pacific. [2]

Three years elapsed until production examples were built. Partly, this was due to extensive testing, but wartime necessitated priority in construction to the L1s Mikado type for freight. In 1917 Altoona’s Juniata Shops started producing K4s in numbers. The first 168 carried widely scattered road numbers as traditional for the PRR, but subsequent locomotives produced after 1920 were numbered in consecutive blocks. Year

There are only two surviving K4s class locomotives. Number 3750 is on display at the Railroad Museum of Pennsylvania in Strasburg. Number 1361 was set to be restored to operation by the Railroaders Memorial Museum in Altoona through the restoration shop at Steamtown National Historic Site. However, due to the difficulty of overseeing the work, Altoona has halted the restoration until their restoration shop is completed. As of 2008, 1361 is sitting in pieces in a corner of Steamtown’s roundhouse. In 2010, the Railroaders Memorial Museum announced that the restoration was to be canceled, and the engine, when it arrives at the museum, would be reassembled and receive only a cosmetic restoration. [3] At that time, most of the restoration was completed save for that of the boiler and other components, so it is possible that the museum may resume the restoration to operating condition in the future. [ citation needed]

In May 2018, Bennett Levin, famous for his work preserving and operating two PRR E8 locomotives, announced that there are now plans in the works for a full restoration of #1361. Six P70fr passenger cars have been bought from a railway museum in Texas, two B6a baggage cars, and a first class parlor car will make up a full length exhibit train. The train plans to replicate a 1940s Pennsylvania Railroad passenger train. The plan is to work with the state’s educators to give rides at tourist railroads within the state to school children on field trips, thus educating them on the history of how the Pennsylvania Railroad shaped their state. The exhibit train will travel between railroads by way of their own funding and insurance, meaning the program will not rely on Amtrak, Norfolk Southern, or the state paying any money towards the program. Levin is working alongside Wick Moorman, former CEO of Norfolk Southern and the head of the former 21st Century Steam Program. No dates on the project’s completion have been stated, but some have rumored late 2020, which would be the year before the 175th anniversary of the Pennsylvania Railroad. In fiction [ edit ]

• The Thomas and Friends character Hank is based on the K4. In the 2016 special, Thomas & Friends: The Great Race, Gordon was streamlined in hopes that he would win in the racing competition. The casing appeared to be based on the Loewy design.