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 In time, larger 0-6-0 locomotives were introduced and superseded them on other railroads.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'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.

2021年1月14日 · 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.

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 third rail

There were 24 of this class built new, all at Altoona. 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. This shows later-built engines of its class.

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.

Media in category "PRR AA1" The following 4 files are in this category, out of 4 total. Electric traction for railway trains; a book for students, electrical and mechanical engineers, superintendents of motive power and others (1911) (14735801366).jpg 2,276 × 1,564; 775 KB

PRR CHRONOLOGY. A GENERAL CHRONOLOGY OF THE PENNSYLVANIA RAILROAD COMPANY. PREDECESSORS AND SUCCESSORS AND ITS HISTORICAL CONTEXT . by Christopher T. Baer . A work in progress document: Salvaging History: LAST RUNS OF PASSENGER SERVICE BY LINE SEGMENT PRR NAMED PASSENGER TRAINS

Due to the additional weight of the added equipment and the weight restriction on the Grand Central Terminal Park Avenue Viaduct, the locomotive was equipped with a three-axle rear truck, giving it an uncommon B-A1A wheel arrangement. The …