Pennsylvania Railroad class D7
| Pennsylvania Railroad D7 | ||
|---|---|---|
Factor of adh. | 4.7 (D7) 4.4 (D7a) | |
Class D7 (formerly Class A (anthracite), pre-1895) on the Pennsylvania Railroad was a class of 4-4-0 steam locomotive.[4] Fifty-eight were built by the PRR's Altoona Works (now owned by Norfolk Southern) between 1882–1891 with 68 in (1.73 m) drivers, while sixty-one of class D7a were constructed with 62 in (1.57 m) drivers.[1]
The D7 was fundamentally an anthracite-burning version of the PRR D6, with a larger fire-grate in order to burn the slower-burning, harder coal.[5]
References
- ^ a b c d e "PRR Steam Roster". Northeast Rails. Retrieved 2007-12-31.
- ^ a b c d e Pennsylvania Railroad. "D7 Diagram". PRR.Railfan.net. Retrieved 2008-08-17.
- ^ a b c d e f g h i j k l m n o p q r Pennsylvania Railroad. "D7a Diagram". PRR.Railfan.net. Retrieved 2008-08-17.
- LCCN 62020878.
- ^ Warner, Paul T. (1924). Motive Power Development on the Pennsylvania railroad System. Philadelphia: Baldwin.
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