PRR D3
PRR D3 #274 in its builders' portrait.
Type and origin
Power typeSteam
BuilderPRR Altoona Works
Build date1869–1881
Total produced67
Specifications
Configuration:
​
 • Whyte4-4-0
 • UIC2′B
Gauge4 ft 8+1⁄2 in (1,435 mm)
Leading dia.28 in (711 mm) (D2a)[1]
Driver dia.62 in (1,575 mm)[1]
Wheelbase22 ft 5+5⁄8 in (6.85 m)[1]
Length54 ft 5.44 in (16.60 m)[1]
Width9 ft 0.94 in (2.77 m)[1]
Height14 ft 8 in (4.47 m)[1]
Adhesive weight50,950 lb (23.1 tonnes)[1]
Loco weight79,100 lb (35.9 tonnes)[1]
Tender weight51,400 lb (23.3 tonnes)[1]
Total weight130,500 lb (59.2 tonnes)[1]
Tender typeEight-wheel with water scoop
Fuel typeSoft coal
Fuel capacity8,000 lb (3.6 tonnes)[1]
Water cap.2,400 US gal (9,100 L; 2,000 imp gal)[1]

The Pennsylvania Railroad's steam locomotive class D3 (formerly Class C, pre-1895) comprised sixty-seven 4-4-0 locomotives intended for general passenger and freight service, constructed at the railroad's own Altoona Works (now owned by Norfolk Southern) during 1869–1881.[2] They were the third standardized class of locomotives on the railroad and the most numerous of the early standard types; they shared many parts with other standard classes.[3]

This design differed from the Class A (later D1) mainly in its smaller drivers for greater tractive effort for freight haulage. Like all the early standardized 4-4-0s on the PRR, the Class C had a wagon-top boiler with steam dome and a firebox between the two driving axles.[2][4]

References

  1. 1 2 3 4 5 6 7 8 9 10 11 12 Pennsylvania Railroad. "Class D3 diagram". PRR.Railfan.net. Retrieved 2014-01-08.
  2. 1 2 "PRR Steam Roster". Northeast Rails. Retrieved 2014-01-08.
  3. ↑ Dredge, James (1879). The Pennsylvania Railroad. London: Engineering magazine.
  4. ↑ Warner, Paul T. (1924). Motive Power Development on the Pennsylvania Railroad System. Philadelphia: Baldwin Locomotive Works.
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