Pennsylvania Railroad class D4 explained

PRR D4
Powertype:Steam
Builder:PRR Altoona shops
Builddate:1873–1890
Totalproduction:37
Whytetype:4-4-0
Uicclass:2′B
Leadingdiameter:280NaN0[1]
Driverdiameter:620NaN0
Wheelbase:22inchesftNaNinchesin (ftin) (locomotive); 46inchesftNaNinchesin (ftin) (locomotive and tender)
Length:56inchesft3.94inchesin (ftin)
Height:14inchesft5.96inchesin (ftin)
Weightondrivers:562001NaN1
Locoweight:818001NaN1
Tenderweight:514001NaN1
Locotenderweight:1332001NaN1
Tendertype:8-wheel with water scoop
Fueltype:Anthracite coal
Fuelcap:120001NaN1
Watercap:2400usgal

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 (now owned by Norfolk Southern) 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.[4]

In 1875, fifteen locomotives were either built or converted (sources differ) with 680NaN0 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. Web site: PRR D4 Diagram . Pennsylvania Railroad . PRR.Railfan.net . 2008-08-23.
  2. Web site: PRR Steam Roster . Northeast Rails . 2007-12-31.
  3. Book: Dredge , James . The Pennsylvania Railroad . 1879 . Engineering magazine . London.
  4. Book: Warner , Paul T. . Motive Power Development on the Pennsylvania Railroad System . 1924 . . Philadelphia.