Pennsylvania Railroad Class CC2s

PRR Class CC2s
PRR No. 7335 in Columbus, OH 1938
Technical specifications
Serial number(s)	51716, 51867, 51904, 51938, 51973, 51994, 52054, 52227, 52291, 52372
Manufacturer(s)	Baldwin
Build date	April–September 1919
Total produced	10
Classification	CC2s
Dia. of Drivers	51"
Weight	458,140 Lbs. (Engine) 191,860 Lbs. (Tender)
Rail gauge	4 ft 8+1⁄2 in (1,435 mm)
Valve gear	Walschaerts
Valves	14"
Cylinders	40" x 28" (Low Pressure) 26" x 28" (High Pressure)
Boiler type	Radial-Stay
Boiler pressure	225 Lbs.
Superheater	Schmidt
Fuel type	Coal
Fuel capacity	18 Tons of Coal 10,000 Gallons of Water
Performance figures
Tractive effort	99,796 Lbs.
Factor of adhesion	4,59
Service information
Running numbers	7250, 7332, 7335, 7649, 7693, 8158, 8183. 9357 – 9359
Disposition details
Preserved	None were preserved
Disposition	All scrapped

The Pennsylvania Railroad (PRR) class CC2s consisted of ten 0-8-8-0 compound articulated (Mallet) type of steam locomotive built by Baldwin Locomotive Works in 1919 for PRR. These were used for transfer runs and used for switching as "yard hump" power.

History and Design

Built as Compound Mallets, these locomotives were the PRR's most successful Articulated engine as they lasted longer than any other Mallet used on the PRR. The Locomotive's design inspiration was the earlier CC1s designed in April 1912, leading to a batch of heavy-duty Mallets in use on the Pennsylvania Lines. All built with Schmidt Superheaters, they originally were delivered with center-position Headlights but were later removed and mounted high like other Pennsy steam. Unlike most steam on the Pennsylvania, the CC2s were built with Radial-stay Fireboxes rather than the typical Belpaire Firebox Boilers. By 1957, all steam locomotives of the PRR were retired when the PRR switched from steam to diesel. These large engines continued to pull heavy transfer runs throughout the 1940s until the PRR sold them for scrap between October 1947 and April 1949.

Stock List

All Units were built as Compound Expansion Mallets, never rebuilt to Simple as they were restricted to Yard Services Mostly.

Number(s)	Builder	Serial	Year Built	Retired and Scrapped	Notes
7250	Baldwin	51716	April 1919	December 1947
7332	Baldwin	51867	June 1919	August 1948
7335	Baldwin	51904	June 1919	March 1948
7649	Baldwin	51938	June 1919	April 1948
7693	Baldwin	51973	June 1919	April 1949
8158	Baldwin	52291	September 1919	October 1947
8183	Baldwin	52372	September 1919	March 1948	Road number chosen for Lionel's Vision Line CC2s.
9357	Baldwin	51994	July 1919	December 1947
9358	Baldwin	52054	July 1919	May 1948
9359	Baldwin	52227	August 1919	March 1948

Trivia

• Lionel Trains introduced a Highly detailed Model of the PRR CC2s through they're Vision Line Series in their 2009 Volume II Catalog. 
• The CC2s was noted to have been the Most Successful 0-8-8-0's ever to enter Service on American Rails, similarly the Rival Company New York Central bought batches of these Enormous Small-Driver'd Mallets for the same Purposes.
• The 0-8-8-0 design was considered to be called the "Angus" type, but was Unofficial as the CC2s were never nicknamed.