Pennsylvania Railroad 3750 Article

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PRR 3750 Latitude and Longitude:

39°58′56″N 79°9′40″W / 39.98222°N 79.16111°W / 39.98222; -79.16111

PRR 3750
PRR K4s 4-6-2 3750.JPG
Type and origin
Power typeSteam
Builder Altoona Works
Build date1918
 •  Whyte 4-6-2
Gauge4 ft 8 12 in (1,435 mm)
Leading dia.36 in (914 mm)
Driver dia.80 in (2,032 mm)
Trailing dia.50 in (1,270 mm)
Wheelbase13 ft 10 in (4.2 m) between driving axles
Length83 ft 6 in (25.5 m)
Loco weight274,500 lb (124,511 kg)
 • Firegrate area
70 sq ft (7 m2)
Boiler pressure205  psi (1,413  kPa)
Cylinder size27 in × 28 in (686 mm × 711 mm)
Performance figures
Tractive effort44,460  lbf (197,767.9  N)
Factor of adh.4.54
Operators Pennsylvania Railroad
Class K4s
Current owner Pennsylvania Historical and Museum Commission
Official namePassenger Locomotive No. 1737
DesignatedDecember 17, 1979
Part ofPennsylvania Railroad Rolling Stock Thematic Resource
Reference no.79002273 [1]

PRR 3750 is a Pennsylvania Railroad K4s steam locomotive located in the Railroad Museum of Pennsylvania, outside of Strasburg, Pennsylvania in the United States. For over a decade, 3750 stood in for the prototype K4s, 1737, and was listed on the National Register of Historic Places in 1979. It is one of the two remaining K4s locomotives and, along with PRR 1361, was designated the official state steam locomotive in 1987 by the Pennsylvania General Assembly.


PRR 3750 was used to haul the Pennsylvania Railroad's main line passenger trains such as the Broadway Limited. Despite the attempt by railroad management to replace the K4s with the K5 and T1, the K4s would remain in action until dieselization in 1957. The 3750 was spared from being scrapped because, when the Pennsylvania Railroad was considering steam engines for preservation, the first K4, 1737, had deteriorated to the point that it was not worth preserving. The Pennsylvania decided to scrap 1737 and use 3750 as a stand-in; 3750 received the original number plates and tender from 1737. [2]

3750 ready to pull Warren Harding's funeral train.

In 1921, 3750 headed up soon-to-be President Warren G. Harding's campaign train. [3] Three years later, it also was one of the locomotives that pulled Harding's funeral train.

The Pennsylvania General Assembly designated 3750 and 1361 the official state steam locomotives on December 18, 1987, while also designating the GG1 4859 the state electric locomotive in the same bill. [4]


As of 2008, the 3750 sits on static display at the Railroad Museum of Pennsylvania in Strasburg. It will soon be cosmetically restored in tandem with multiple other PRR locomotives on site.

See also


  1. ^ "NPS Focus". National Register of Historic Places. National Park Service. Retrieved July 27, 2013.
  2. ^ Pennsylvania Railroad Rolling Stock 1978, sec. 7, p. 9.
  3. ^ Alexander, Larry (February 29, 2000). "Full steam ahead; Railroad Museum explores presidential ties". Intelligencer Journal. Lancaster, Pennsylvania. p. B1.
  4. ^ Act of Dec. 18, 1987, P.L. 421, No. 89.