The Pennsylvania Railroad's class HH1s comprised a single 2-8-8-2 type steam locomotive. [2] Unlike most Pennsylvania Railroad steam locomotives, it had a wagon-top boiler. It was built by the American Locomotive Company (ALCO) in 1911. For 17 years, the single HH1s served as a helper until 1928.

Class HH1s (Locobase 325) Data from Wiener (1930) and Roy V Wright, Locomotive Dictionary 1912 (Third) Edition (New York: Simmons-Boardman Company, 1912), Figure 107, p. 192.

The Pennsylvania Railroad's class HH1s comprised a single 2-8-8-2 type steam locomotive. Unlike most Pennsylvania Railroad steam locomotives, it had a wagon-top boiler. It was built by the American Locomotive Company (ALCO) in 1911. For 17 years, the single HH1s served as a helper until 1928.

The Pennsylvania Railroad class HH1s/Y3s are four-cylinder compound articulated locomotives that consist of six examples of ex-Norfolk and Western Railway Y3 class 2-8-8-2 (Whyte notation) wheel arrangement.

The Norfolk and Western Y3 and Y3a classes were classes of 2-8-8-2 "Mallet" articulated steam locomotives, with a total of 80 locomotives built for the Norfolk and Western Railway between 1919 and 1923.

The PRR only owned one type of Decapod, class I1s, but they owned 598 of them, one of the largest classes of identical power in the United States. I1s/I1sa - heavy freight hauler. J: 2-6-2 and 2-10-4

The Pennsylvania Railroad class HH1s/Y3s are four-cylinder compound articulated locomotives that consisted of only just six examples of ex-Norfolk and Western Railway Y3 class 2-8-8-2 wheel arrangement.

Do you have any PRR diagrams that are not on this site? If so please e-mail me so we can arrange to scan and add them to the site! Go to the PRR freight car index!

The Pennsylvania Railroad's class HH1s comprised a single 2-8-8-2 type steam locomotive. Unlike most Pennsylvania Railroad steam locomotives, it had a wagon-top boiler. It was built by the American Locomotive Company (ALCO) in 1911. For 17 years, the single HH1s served as a helper until 1928.

Feb 2, 2003 · HH1: Nicknamed 'Big Liz' by PRR men, this astoundingly powerful electric locomotive was the first heavy-duty, main-line electric locomotive the PRR built. It proved, in fact, too powerful for 1917 technology; after pulling out one too many couplers it …