New Orleans, Texas & Mexico 2-8-0 "Consolidation" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class C-55 - 35.3 (Locobase 7767)

Data from MP SUBS 7 - 1935 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 29624 in November 1906; 29688-29692, 29724, 29725, 29779-29780 in December.

Locobase 16546 shows the original 1906 class of 20 Consolidations delivered to the Saint Louis-San Francisco. Ten years later, the SL-SF sold half of the class to the NOT&M. Frisco road numbers were 971-975, 977-978, 982-983, 985.

The MP subsidiary superheated the class soon after they arrived. Then, after these engines were taken into the Missouri Pacific in 1924, several were fitted with two Nicholson thermic syphons that contributed 54 sq ft (5.02 sq m) to the locomotive's direct heating surface.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassC-55 - 35.3
Locobase ID7767
RailroadNew Orleans, Texas & Mexico (NOT & M/MP)
CountryUSA
Whyte2-8-0
Number in Class10
Road Numbers101-110/1031-1040
GaugeStd
Number Built
BuilderMP
Year1917
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)14.33 / 4.37
Engine Wheelbase (ft / m)23.67 / 7.21
Ratio of driving wheelbase to overall engine wheelbase 0.61
Overall Wheelbase (engine & tender) (ft / m)58.34 / 17.78
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)163,050 / 73,958
Engine Weight (lbs / kg)185,800 / 84,278
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)6000 / 22.73
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)2300 / 8706
Minimum weight of rail (calculated) (lb/yd / kg/m)68 / 34
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)55 / 1397
Boiler Pressure (psi / kPa)185 / 12.80
High Pressure Cylinders (dia x stroke) (in / mm)21" x 28" / 533x711
Tractive Effort (lbs / kg)35,304 / 16013.64
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.62
Heating Ability
Tubes (number - dia) (in / mm)184 - 2" / 51
Flues (number - dia) (in / mm)30 - 5.375" / 137
Flue/Tube length (ft / m)14 / 4.27
Firebox Area (sq ft / m2)210 / 19.51
Grate Area (sq ft / m2)46.60 / 4.33
Evaporative Heating Surface (sq ft / m2)2144 / 199.26
Superheating Surface (sq ft / m2)441 / 40.99
Combined Heating Surface (sq ft / m2)2585 / 240.25
Evaporative Heating Surface/Cylinder Volume191.09
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation8621
Same as above plus superheater percentage10,087
Same as above but substitute firebox area for grate area45,455
Power L110,826
Power MT585.52

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