New Orleans, Texas & Mexico 2-10-0 "Decapod" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class D-52 - 51.5 (Locobase 7768)

Data from MP SUBS 7 - 1935 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. 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.

As noted in several other Locobase entries, 857 2-10-0s were built by Baldwin and Alco (Richmond and Schenectady Works) for the Russian Government (see Locobase 381 for a full description). The NOT & M's decks came second-hand from a variety of earlier owners including the St Louis & Hannibal (which had an 85-mile line from Hannibal to Gilmore), the Marion & Eastern (an Indiana shortline), and the Southern Railway.

At least five of these were fitted with Nicholson thermic syphons (Locobase believes this was after they entered NOT & M service) which added 56 sq ft to the firebox heating surface. Two others were shown in the next diagram to have had 194 sq ft of firebox heating surface and a total evaporative heating surface of 2,590 sq ft.

Specifications by Steve Llanso of Sweat House Media
ClassD-52 - 51.5
Locobase ID7768
RailroadNew Orleans, Texas & Mexico (NOT & M/MP)
Number in Class8
Road Numbers941-948
Number Built8
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase18.67'
Engine Wheelbase27.83'
Ratio of driving wheelbase to overall engine wheebase 0.67
Overall Wheelbase (engine & tender)60.33'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers185000 lbs
Engine Weight210000 lbs
Tender Light Weight132000 lbs
Total Engine and Tender Weight342000 lbs
Tender Water Capacity7400 gals
Tender Fuel Capacity (oil/coal)3300 gals
Minimum weight of rail (calculated)62 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter52"
Boiler Pressure180 psi
Cylinders (dia x stroke)25" x 28"
Tractive Effort51490 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.59
Heating Ability
Firebox Area237 sq. ft
Grate Area64.60 sq. ft
Evaporative Heating Surface2632 sq. ft
Superheating Surface563 sq. ft
Combined Heating Surface3195 sq. ft
Evaporative Heating Surface/Cylinder Volume165.45
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation11628
Same as above plus superheater percentage13721
Same as above but substitute firebox area for grate area50339
Power L18712
Power MT519.10

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