Pennsylvania Railroad class D15

PRR D15
PRR #1515 in its official builders' portrait.
Type and origin Power type Steam Builder PRR Altoona Shops Build date 1892 Total produced 1
Specifications Configuration: ​  • Whyte 4-4-0  • UIC 2′B nv2 Gauge 4 ft 8+1⁄2 in (1,435 mm) Leading dia. 42 in (1,067 mm) Driver dia. 84 in (2,134 mm) Wheelbase Coupled: 8 ft 0 in (2.44 m), Loco: 27 ft 9+1⁄4 in (8.46 m), Loco & tender: 48 ft 1 in (14.66 m) Length 59 ft 7.8 in (18,181 mm) Height 14 ft 11.5 in (4,559 mm) Axle load 48,500 lb (22.0 tonnes) Adhesive weight 84,000 lb (38.1 tonnes) Loco weight 145,500 lb (66.0 tonnes) Total weight 222,500 lb (100.9 tonnes) Fuel type Soft coal Fuel capacity 15,000 lb (6.8 tonnes) Water cap. 3,000 US gal (11,000 L; 2,500 imp gal) Firebox: ​  • Grate area 30 sq ft (2.8 m2) Boiler pressure 205 lbf/in2 (1.41 MPa) Heating surface: ​  • Firebox 163 sq ft (15.1 m2)  • Tubes 1,662 sq ft (154.4 m2)  • Total surface 1,825 sq ft (169.5 m2) Cylinders 2 (Lindner compound) High-pressure cylinder 19.5 in × 28 in (495 mm × 711 mm) Low-pressure cylinder 31 in × 28 in (787 mm × 711 mm) Valve gear Stephenson
Performance figures Tractive effort 20,800 lbf (92.52 kN) Factor of adh. 4.04
Career Operators Pennsylvania Railroad Class D15 Number in class 1 Numbers 1515 Retired 1905

The class D15 (class T, pre 1895) of the Pennsylvania Railroad comprised a solitary Lindner-system cross compound steam locomotive of 4-4-0 "American" wheel arrangement in the Whyte notation. The sole locomotive was #1515, built in 1892 at the PRR's Altoona Shops. It was British in appearance with a full-length footplate, splashers, a six-wheel tender, and large 84 in (2,134 mm) drivers. It was built in 1892 by the PRR's Altoona Works, and remained in service until it was retired and scrapped in November 1905.