The K28, K2, and K3 were the Pennsylvania's first examples of a 4-6-2 Pacific passenger steam locomotive. The first of this type ordered by the PRR was the lone K28, bought from the Pittsburgh Works of the American Locomotive Company (ALCo).

The PRR was looking for a new more powerful locomotive and bought its first "Pacific", an experimental 4-6-2 built in 1907, by the Pittsburgh Works of the American Locomotive Company. This single locomotive was designated as Class K-28 and given road number 7067.

The Pennsylvania Railroad Class K2 were a class of 72 Baldwin-built 4-6-2 "Pacific" type steam locomotive that were built by the Pennsylvania Railroad themselves at their own Juniata Shops in 1910. A total of 72 examples of the Pennsylvania Railroad Class …

The PRR assigned class K to the 4-6-2 "Pacific" type. The Pacific was the most common type of passenger locomotive on the Pennsylvania. K2 - 153 built at Altoona 1910-1911; K3s - 30 built by Baldwin in 1913. K4 - 425 built by the PRR and Baldwin 1914-1928. K5 - …

A K4s decorated for PRR's "Lines West" to resemble other railroads' engines in the area. A pre-World War II K4s with "chicken-coop" pilot The K4s which was almost completely covered by her streamlining, thus earning the "torpedo" nickname from her crews.

Notes for classes K2, K2s, K2a and K2sa: all had 24" x 26" cylinders, 80" drivers, fabricated trailing trucks, Belpaire fireboxes with 55.4 square feet of grate area, piston valves and Walschaerts valve gear.

Mar 10, 2019 · Now to finish off my K2 class, here is a Westside PRR K2 in brass. A loco I acquired this about 2 years ago. This Mantua/Cary/MDC version turned out really nice. It compares favorably with the brass model. I did not know Don made a K2 boiler in his Cary line.

Just going from memory, the PRR did have early Pacific type locomotives, all of which would have be a "K Class", prior to the K4 series (maybe K2 and or K3?). At any rate the K4 Class were first named "K4", and when superheating was added, they were then classed K4s.

best sources for K2/K2s/K2sa/K2sb photos. As far as the web goes, try www.northeast.railfan.net. Click on the PRR steam roster, then click on the K class listing. There are about two dozen K2 and subclass photos. I checked Rob Schoenberg's PRR page; the only Pacific he has listed on his steam diagrams page is the K4s.

Oct 22, 2004 · In 1911, the K2 became the first Pennsylvania Railroad engines to use superheating. Superheating used a collecting chamber which ran inside the boiler tubes and re-routed steam into tubes which dried and greatly heated it.