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- Die Klasse DD1 der Pennsylvania Railroad (PRR) waren elektrisch angetriebene Doppellokomotiven mit der Achsfolge 2’B+B2’, deren Stromversorgung über eine von oben bestrichene 650 V-Stromschiene erfolgte. Vor dem Bau der Lokomotiven wurden Fahrdynamik-Versuche durchgeführt, um die geeignete Bauart zu ermitteln. (de)
- The Pennsylvania Railroad DD1 was a class of boxcab electric locomotives built by the Pennsylvania Railroad. The locomotives were developed as part of the railroad's New York Tunnel Extension, which built the original Pennsylvania Station in New York City and linked it to New Jersey via the North River Tunnels. The Pennsylvania built a total of 66 locomotives in its Altoona Works; they operated in semi-permanently coupled pairs. Westinghouse supplied the electrical equipment. The first locomotives entered service in 1910, with the opening of Pennsylvania Station. They operated between Manhattan Transfer and Pennsylvania Station, and from there to the coach yards at Sunnyside Yard in Queens, New York. With the arrival of the Class L5 locomotives in 1924, some DD1s moved to the Pennsylvania-owned Long Island Rail Road (LIRR), which had substantial electrified commuter rail operations. The conversion of the New York–Philadelphia main line to alternating current in the 1930s saw the remainder of the DD1s scrapped or transferred to the LIRR. One pair, Nos. 3936 and 3937, is preserved at the Railroad Museum of Pennsylvania and is listed on the National Register of Historic Places. (en)
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- 66 (xsd:nonNegativeInteger)
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- Resistance controlled DC current supplied to DC motors connected to the axles through Jackshaft and side rods (en)
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- between driving axles (en)
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- Die Klasse DD1 der Pennsylvania Railroad (PRR) waren elektrisch angetriebene Doppellokomotiven mit der Achsfolge 2’B+B2’, deren Stromversorgung über eine von oben bestrichene 650 V-Stromschiene erfolgte. Vor dem Bau der Lokomotiven wurden Fahrdynamik-Versuche durchgeführt, um die geeignete Bauart zu ermitteln. (de)
- The Pennsylvania Railroad DD1 was a class of boxcab electric locomotives built by the Pennsylvania Railroad. The locomotives were developed as part of the railroad's New York Tunnel Extension, which built the original Pennsylvania Station in New York City and linked it to New Jersey via the North River Tunnels. The Pennsylvania built a total of 66 locomotives in its Altoona Works; they operated in semi-permanently coupled pairs. Westinghouse supplied the electrical equipment. (en)
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- PRR-Klasse DD1 (de)
- Pennsylvania Railroad class DD1 (en)
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