New Orleans, Texas & Mexico 2-10-0 "Decapod" Locomotives in 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 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.

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.

Principal Dimensions 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 Wheelbase (ft / m)18.67 / 5.69
Engine Wheelbase (ft / m)27.83 / 8.48
Ratio of driving wheelbase to overall engine wheebase 0.67
Overall Wheelbase (engine & tender) (ft / m)60.33 / 18.39
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)185,000 / 83,915
Engine Weight (lbs / kg)210,000 / 95,255
Tender Loaded Weight (lbs / kg)132,000 / 59,874
Total Engine and Tender Weight (lbs / kg)342,000 / 155,129
Tender Water Capacity (gals / ML)7400 / 28.03
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)3300
Minimum weight of rail (calculated) (lb/yd / kg/m)62 / 31
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)52 / 1321
Boiler Pressure (psi / kPa)180 / 12.40
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) 3.59
Heating Ability
Firebox Area (sq ft / m2)237 / 22.03
Grate Area (sq ft / m2)64.60 / 6
Evaporative Heating Surface (sq ft / m2)2632 / 244.61
Superheating Surface (sq ft / m2)563 / 52.32
Combined Heating Surface (sq ft / m2)3195 / 296.93
Evaporative Heating Surface/Cylinder Volume165.45
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation11,628
Same as above plus superheater percentage13,721
Same as above but substitute firebox area for grate area50,339
Power L18712
Power MT519.10

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