Pennsylvania Railroad DD2

The Pennsylvania Railroad DD2 was a single prototype electric locomotive that never entered series production. It was meant as an improved and simplified GG1 for the planned extension of the railroad's electrification west of Harrisburg, Pennsylvania, which was never built. The design was outlined at a meeting in Philadelphia on 21 May 1937 attended by the railroad, Baldwin, General Electric, Westinghouse and the consultants Gibbs and Hill. Like the GG1 it had two hinged frames under a swivelling body, but with four driven axles instead of six, each wheel having two 625 horsepower motors for 5,000 horsepower in all. The one locomotive, number 5800, worked tunnel helper service at Baltimore until it was scrapped in September 1962.