Tudela 2-6-0 Locomotives in Spain


Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 14650)

Data from DeGolyer, Vol 60, pp. 314. Works numbers were 53437-53438 in July 1920.

The AGN was a sugar producer that ordered two Moguls identical to those of rival SGAE at the same time.

The Baldwin file contains a 20 March 1921 letter that details three features that had come in for criticism by the AGN. The customer rejected the Nathan Monitor No 7 injectors in favor of non-lifting Friedmann type, the latter to be placed outside the cab. The New York Air Brake company's vacuum brakes were not compatible with those used on Spain's Norte, where these 2-6-0s would operate. "Furthermore," the letter continues,"they strongly object to [this type of brake and prefer] an automatic breake design "manufactured by the Clayton Company which maintains a constant vacuum above and below the piston."

Criticism of the slide valves centered on the quality of finish: "not ...properly machined and ground and ...ill-fitting with a great loss of steam." Because they were not equipped to polish these valves properly, the company desired bronze valves that would be softer than the adjacent rubbing surface and thus develop a tighter seal.

The writer stressed to Baldwin's headquarters that the AGN had bought these engines non-competitively and looked forward to their performing the service for which they were procured. He said that he had responded that Baldwin would cooperate to achieve a "completely satisfactory" result.

Principal Dimensions by Steve Llanso of Middle Run Media
Class1
Locobase ID14650
RailroadTudela (Agricola Industrial Navarra)
CountrySpain
Whyte2-6-0
Number in Class2
Road Numbers1-2
Gauge5'6"
Number Built2
BuilderBaldwin
Year1920
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)10.50 / 3.20
Engine Wheelbase (ft / m)17.67 / 5.39
Ratio of driving wheelbase to overall engine wheelbase 0.59
Overall Wheelbase (engine & tender) (ft / m)43 / 13.11
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)84,000 / 38,102
Engine Weight (lbs / kg)100,000 / 45,359
Tender Loaded Weight (lbs / kg)65,000 / 29,484
Total Engine and Tender Weight (lbs / kg)165,000 / 74,843
Tender Water Capacity (gals / ML)3000 / 11.36
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)6 / 6
Minimum weight of rail (calculated) (lb/yd / kg/m)47 / 23.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)48 / 1219
Boiler Pressure (psi / kPa)180 / 1240
High Pressure Cylinders (dia x stroke) (in / mm)16" x 24" / 406x610
Tractive Effort (lbs / kg)19,584 / 8883.16
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.29
Heating Ability
Tubes (number - dia) (in / mm)212 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.17 / 3.10
Firebox Area (sq ft / m2)104.10 / 9.67
Grate Area (sq ft / m2)24.30 / 2.26
Evaporative Heating Surface (sq ft / m2)1219 / 113.25
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1219 / 113.25
Evaporative Heating Surface/Cylinder Volume218.26
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4374
Same as above plus superheater percentage4374
Same as above but substitute firebox area for grate area18,738
Power L14485
Power MT353.13

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