Builder information from B Rumary list supplied by Allen Stanley in March 2004. Works numbers were 1756-1759 (December 1897-January 1898) and 1939-1945 (June 1899).
Although the data come from the St Louis-San Francisco era, the locomotives started out on the P M & Y. They were taken up by the New York Central and renumbered 9400-9410. The Pittsburgh & Lake Erie locomotives (121 et seq) later taken in the NYC as the 9300-9314 (Locobase 7072) were of the same design.
Rumary details the 9400 class's subsequent dispositions.
Successor roads ranged as widely as the Moon Run/Montour in Pennsylvania to the Muscle Shoals, Birmingham & Pensacola in Alabama to the St Louis-San Francisco to the Montana, Wyoming & Southern. Scotts Run railroad had 5 from a variety of orders.
|Specifications by Steve Llanso of Sweat House Media|
|Railroad||Pittsburgh, McKeesport & Youghiogheny|
|Number in Class||11|
|Road Numbers||271-281 / 870-871|
|Locomotive Length and Weight|
|Ratio of driving wheelbase to overall engine wheebase||0.65|
|Overall Wheelbase (engine & tender)||52.10'|
|Axle Loading (Maximum Weight per Axle)|
|Weight on Drivers||142000 lbs|
|Engine Weight||157500 lbs|
|Tender Light Weight||111700 lbs|
|Total Engine and Tender Weight||269200 lbs|
|Tender Water Capacity||4600 gals|
|Tender Fuel Capacity (oil/coal)||9.6 tons|
|Minimum weight of rail (calculated)||59 lb/yard|
|Geometry Relating to Tractive Effort|
|Boiler Pressure||180 psi|
|Cylinders (dia x stroke)||20" x 26"|
|Tractive Effort||31200 lbs|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.55|
|Firebox Area||162.50 sq. ft|
|Grate Area||25.50 sq. ft|
|Evaporative Heating Surface||1800 sq. ft|
|Combined Heating Surface||1800 sq. ft|
|Evaporative Heating Surface/Cylinder Volume||190.40|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||4590|
|Same as above plus superheater percentage||4590|
|Same as above but substitute firebox area for grate area||29250|