Data from RDG 11-1926 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See the quite detailed overview published by designer Alphonse I Lipetz, "Russian 'Decapod' Locomotives", The Railway Engineer, Volume 43, No 2 (February 1922), pp. 51-54; April 1922, pp. 136-137; July 1922, pp. 249-251; and November 1922, pp. 415-417. (Many thanks to Jane Macken for asking about this class and thanks to Chris Hohl for his 8 February 2019 email correcting the Russian decapods' wheelbases, adhesion, tender, and engine weights.) Works numbers were 47366-47368 in December 1917.
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. Although all of the Russian decks were built to a common specification, several US railroads published later diagrams that reflected either updates or their own standards of measurements.
The Reading's quartet consisted of three that were built as a batch. 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.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | J1-sa |
| Locobase ID | 10017 |
| Railroad | Philadelphia & Reading |
| Country | USA |
| Whyte | 2-10-0 |
| Number in Class | 4 |
| Road Numbers | 1126-1129 |
| Gauge | Std |
| Number Built | 4 |
| Builder | Baldwin |
| Year | 1916 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 18.33 / 5.59 |
| Engine Wheelbase (ft / m) | 27.83 / 8.48 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.66 |
| Overall Wheelbase (engine & tender) (ft / m) | 60.29 / 18.38 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 42,550 / 19,300 |
| Weight on Drivers (lbs / kg) | 183,500 / 83,008 |
| Engine Weight (lbs / kg) | 208,400 / 94,529 |
| Tender Loaded Weight (lbs / kg) | 132,000 / 64,501 |
| Total Engine and Tender Weight (lbs / kg) | 340,400 / 159,030 |
| Tender Water Capacity (gals / ML) | 7000 / 26.52 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 8.80 / 8 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 61 / 30.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 52 / 1321 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 25" x 28" / 635x711 |
| Tractive Effort (lbs / kg) | 51,490 / 23355.50 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.56 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 194 - 2" / 51 |
| Flues (number - dia) (in / mm) | 28 - 5.5" / 140 |
| Flue/Tube length (ft / m) | 17 / 5.18 |
| Firebox Area (sq ft / m2) | 227 / 21.10 |
| Grate Area (sq ft / m2) | 64.70 / 6.01 |
| Evaporative Heating Surface (sq ft / m2) | 2610 / 242.57 |
| Superheating Surface (sq ft / m2) | 579 / 53.81 |
| Combined Heating Surface (sq ft / m2) | 3189 / 296.38 |
| Evaporative Heating Surface/Cylinder Volume | 164.05 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 11,646 |
| Same as above plus superheater percentage | 13,742 |
| Same as above but substitute firebox area for grate area | 48,215 |
| Power L1 | 8781 |
| Power MT | 527.49 |