PRR D4

PRR D4

Type and origin Power type Steam Builder PRR Altoona shops Build date 1873–1890 Total produced 37

Specifications Configuration 4-4-0 UIC class 2′B Gauge 4 ft 8 ^1⁄2 in (1,435 mm) Leading dia 28 in (711 mm)[1] Driver diameter 62 in (1,575 mm)[1] Wheelbase 22 ft 5 ^5⁄8 in (6.848 m) (locomotive); 46 ft 10 ^1⁄8 in (14.278 m) (locomotive and tender)[1] Length 56 ft 3.94 in (17.1689 m)[1] Height 14 ft 5.96 in (4.4186 m)[1] Adhesive weight 56,200 lb (25.5 tonnes)[1] Loco weight 81,800 lb (37.1 tonnes)[1] Tender weight 51,400 lb (23.3 tonnes)[1] Loco & tender weight 133,200 lb (60.4 tonnes)[1] Tender type 8-wheel with water scoop Fuel type Anthracite coal Fuel capacity 12,000 lb (5.4 tonnes)[1] Water cap 2,400 US gal (9,100 l; 2,000 imp gal)[1]

The Pennsylvania Railroad's steam locomotive class D4 (formerly Class C (anthracite), pre-1895) comprised thirty-seven anthracite-burning 4-4-0 locomotives intended for general passenger and freight service on the PRR's New Jersey lines, constructed at the railroad's own Altoona Works during 1873–1890.^[2] They shared many parts with other standard classes.^[3]

This design differed from the Class C (later D3) mainly in its longer firebox to burn slower-burning anthracite coal. Like all the early standardized 4-4-0s on the PRR, the Class C (Anthracite) had a wagon-top boiler with steam dome and a firebox between the two driving axles.^[2][4]

In 1875, fifteen locomotives were either built^[4] or converted^[2] (sources differ) with 68-inch (1,727 mm) drivers for fast passenger service on the New Jersey lines. These were classified Class CA (Anthracite) or later D4a, and handled this traffic until 1881, when they were replaced by heavier power.

References

1. Pennsylvania Railroad. "PRR D4 Diagram". PRR.Railfan.net. Retrieved 2008-08-23.
2. "PRR Steam Roster". Northeast Rails. Retrieved 2007-12-31.
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.