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)
CountryUSA
Whyte2-10-0
Number in Class8
Road Numbers941-948
GaugeStd
Number Built8
BuilderAlco
Year1918
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft)18.67
Engine Wheelbase (ft)27.83
Ratio of driving wheelbase to overall engine wheebase 0.67
Overall Wheelbase (engine & tender) (ft)60.33
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)185,000
Engine Weight (lbs)210,000
Tender Light Weight (lbs)132,000
Total Engine and Tender Weight (lbs)342,000
Tender Water Capacity (gals)7400
Tender Fuel Capacity (oil/coal) (gals/tons)3300
Minimum weight of rail (calculated) (lb/yd)62
Geometry Relating to Tractive Effort
Driver Diameter (in)52
Boiler Pressure (psi)180
High Pressure Cylinders (dia x stroke) (in)25" x 28"
Tractive Effort (lbs)51,490
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.59
Heating Ability
Firebox Area (sq ft)237
Grate Area (sq ft)64.60
Evaporative Heating Surface (sq ft)2632
Superheating Surface (sq ft)563
Combined Heating Surface (sq ft)3195
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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