The Pennsylvania Railroad's class AA1 comprised two experimental electric locomotives constructed in 1905 by the company's own Altoona Works with the assistance of Westinghouse. Intended as testbeds as the PRR began its electrification project, both locomotives remained service into the 1930s.

The Pennsylvania Railroad's class AA1 comprised two experimental electric locomotives constructed in 1905 by the company's own Altoona Works with the assistance of Westinghouse. Intended as testbeds as the PRR began its electrification project, both locomotives remained service into the 1930s.

The Pennsylvania Railroad (PRR) class A1 was a class of 0-4-0 type steam locomotives. The class A1 was built from 1886 to 1892, [1] when 0-4-0s were being used by other railroads. In time, larger 0-6-0 locomotives were introduced and superseded them on other railroads.

The Pennsylvania Railroad (PRR) class I1s steam locomotives were the largest class of 2-10-0 "Decapods" in the United States. From 1916 to 1923, 598 locomotives were produced (123 at Altoona Works and 475 at Baldwin Locomotive Works ).

Jan 14, 2021 · PRR class AA1 10002 was one of two experimental D.C. third-rail units the railroad built when planning the electrification for New York’s Pennsylvania Station, which opened in 1910. PRR’s lone “odd class D” had a wheel arrangement based on the 4-4-0 steam locomotive; it tested on a short section of catenary-equipped Long Island Rail Road track.

These two photos show PRR 930 as built in 1873 (left) and as modified c.1880 to serve as the special engine for the General Superintendent Altoona. It was retired in 1899 and special locomotives assigned to officers' use were discontinued in 1917.

Electrification was quickly proposed for the PRR's planned West to New York route, as steam locomotives were deemed unsuitable in the tunnels and urban areas. Initially, a system with

The PRR classified articulated locomotives and joined locomotive units by using multiples of the previous classifications. Non-Articulated steam: 1320 - 2-2-2-0 locomotive, based on the London and North Western Railway 's Dreadnought Class locomotive.

The Pennsylvania Railroad's class AA1 comprised two experimental electric locomotives constructed in 1905 by the company's own Altoona Works with the assistance of Westinghouse. Intended as testbeds as the PRR began its electrification project, both locomotives remained service into the 1930s.

The Pennsylvania Railroad's class P5 comprised 92 mixed-traffic electric locomotives constructed 1931–1935 by the PRR, Westinghouse and General Electric. [1] Although the original intention was that they work mainly passenger trains, the success of the GG1 locomotives meant that the P5 class were mostly used on freight.