PRR D4

Infobox Locomotive
name = PRR D4
powertype = Steam

---

caption =
builder = PRR Altoona shops
builddate = 1873–1890
totalproduction = 37
whytetype = 4-4-0
uicclass = 2'B
gauge = RailGauge|ussg
leadingsize = convert|28|in|abbr=oncite web
title = PRR D4 Diagram
url = http://prr.railfan.net/diagrams/PRRdiagrams.html?diag=d4.gif&sel=ste&sz=sm&fr=
author = Pennsylvania Railroad
publisher = PRR.Railfan.net
accessdate = 2008-08-23]
driversize = convert|62|in|abbr=on
wheelbase = convert|22|ft|5.625|in|abbr=on (locomotive); convert|46|ft|10.125|in|abbr=on (locomotive and tender)
length = convert|56|ft|3.94|in|abbr=on
width =
height = convert|14|ft|5.96|in|abbr=on
weightondrivers = convert|56200|lb|abbr=on
weight = convert|81800|lb|abbr=on
tenderweight = convert|51400|lb|abbr=on
locotenderweight = convert|133200|lb|abbr=on
tendertype = 8-wheel with water scoop
fueltype = Anthracite coal
fuelc
convert|12000|lb|abbr=on
waterc
convert|2400|usgal|abbr=on

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. cite web
title = PRR Steam Roster
url = http://www.northeast.railfan.net/prr_steam2.html
work = Northeast Rails
accessdate = 2007-12-31] They shared many parts with other standard classes.cite book
title = The Pennsylvania Railroad
first = James
last = Dredge
year = 1879
publisher = "Engineering" magazine
location = London]

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.cite book
title = Motive Power Development on the Pennsylvania Railroad System
first = Paul T.
last = Warner
year = 1924
publisher = Baldwin Locomotive Works
location = Philadelphia]

In 1875, fifteen locomotives were either built or converted (sources differ) with convert|68|in|adj=on 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