As noted in Locobase 381, Baldwin and Alco (Richmond and Schenectady Works) built hundreds of these Decapods for the Russian Government in 1916-1918. When that empire was overthrown, some 200 of the Russian order was diverted to railroads in the US.
The Reading's quartet consisted of three that were built as a batch (Baldwin works numbers were 47366-47368 in December 1917). These were close to being shipped and already received their Russian designations and road numbers (Ye 926-928). When the USRA took over the orphaned Decks, these received the lowest USRA numbers: 1101-1103.
A later single (works 48016 in March 1918) originally operated for the Reading's Central of New Jersey under the USRA's management. Its road number at that time was 1162. Returned to private control in 1920, the engine was sold in 1924 to the Reading.
Although a good design in its own right, the Russian decapod didn't fit particularly well with the Reading's power requirements and all 4 locomotives were scrapped in March 1935.
|Specifications by Steve Llanso of Sweat House Media|
|Railroad||Philadelphia & Reading|
|Number in Class||4|
|Locomotive Length and Weight|
|Ratio of driving wheelbase to overall engine wheebase||0.66|
|Overall Wheelbase (engine & tender)||60.29'|
|Axle Loading (Maximum Weight per Axle)||42550 lbs|
|Weight on Drivers||183000 lbs|
|Engine Weight||208400 lbs|
|Tender Light Weight||142200 lbs|
|Total Engine and Tender Weight||350600 lbs|
|Tender Water Capacity||7000 gals|
|Tender Fuel Capacity (oil/coal)||8.8 tons|
|Minimum weight of rail (calculated)||61 lb/yard|
|Geometry Relating to Tractive Effort|
|Boiler Pressure||180 psi|
|Cylinders (dia x stroke)||25" x 28"|
|Tractive Effort||51490 lbs|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||3.55|
|Firebox Area||227 sq. ft|
|Grate Area||64.70 sq. ft|
|Evaporative Heating Surface||2610 sq. ft|
|Superheating Surface||579 sq. ft|
|Combined Heating Surface||3189 sq. ft|
|Evaporative Heating Surface/Cylinder Volume||164.07|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||11646|
|Same as above plus superheater percentage||13742|
|Same as above but substitute firebox area for grate area||48215|