Pennsylvania Railroad class L1

Type and origin
Type and origin
Power type	Steam
Designer	J. T. Wallace, Alfred W. Gibbs, Axel Vogt
Builder	PRR Juniata Shops (344),; Baldwin Locomotive Works (205),; Lima Locomotive Works (25)
Build date	1914–1919
Total produced	574

Pennsylvania Railroad L1 class
Pennsylvania Railroad L1 class
	Preserved 520 at the Railroad Museum of Pennsylvania.
Power type
Type and origin
Power type	Steam
Designer	J. T. Wallace, Alfred W. Gibbs, Axel Vogt
Builder	PRR Juniata Shops (344),; Baldwin Locomotive Works (205),; Lima Locomotive Works (25)
Build date	1914–1919
Total produced	574
Configuration:;
Specifications
Configuration:;
• Whyte	2-8-2
• UIC	1'D1'
Leading dia.	33 in (0.84 m)
Driver dia.	62 in (1.57 m)
Trailing dia.	50 in (1.27 m)
Wheelbase	36 ft 4.5 in (11.087 m) (locomotive)
Length	82 ft 0.25 in (25.0000 m) (including 90F75 tender)
Height	15 ft 0 in (4.57 m)
Boiler pressure	205 psi (1.41 MPa)
Cylinders	2
Cylinder size	27 in × 30 in (690 mm × 760 mm)
Tractive effort
Performance figures
Tractive effort	61,465 lbf (273.41 kN)
Factor of adh.	3.78
Nicknames
Career
Nicknames	Lollipops
Retired	1948-1960
Disposition	One preserved, remainder scrapped

Pennsylvania Railroad Class L1s were 2-8-2 steam locomotives, similar to the later USRA Heavy Mikados, that were used on the Pennsylvania Railroad during the early twentieth century. These 574 locomotives were manufactured between 1914 and 1919 by the railroad's own Juniata Shops (344 examples) as well as the Baldwin Locomotive Works (205) and the Lima Locomotive Works (25).

It was the largest class of 2-8-2 locomotives anywhere, although other railroads had more Mikados in total.