Norte 4-6-2 Locomotives in Spain

Class Details by Steve Llanso of Sweat House Media

Class 3000/231-4001 (Locobase 3362)

Data from [] . See also diagram UG Type 147, Societe Alsacienne de Constructions Mecaniques from locomotive book supplied by Dany Machi up at [] as Diagrammes des machines SACM construites a GRAFENSTADEN (October 2007); the Duke of Sarragossa, ME, "Pacific Type Express Locomotives for the Northern Railway of Spain,", Locomotive Magazine, Volume 18 (15 November 1912), p. 137; and Pere Comas and Alfred Puig, Breve Historia de la Traccion Vapor en Norte, Trensim TS10H001, Noviembre de 2010. Information on the Duque of Zaragoza from Juan Peris Torner's Compartir Cononcimientos blog at [] . Works numbers were 6236-6241 in 1911 and 6648-6657 in 1913.

The Duque de Zaragoza, a member of the Royal Family, was an active and valued member of the Norte's engineering staff. He was known as a strong proponent of compound expansion. His detailed article on the 3000 class was originally written in French.

Belpaire-boilered de Glehn compound designed to pull a 220-train train at 75 km/h (46.5 mph) on the flat and 35 km/h (21.7 mph) climbing a 1 1/2% grade. Comas and Puig tell us that their trials saw them handily exceed these requirements. Graced with "una elegancia de lineas tipica de este constructor" (an elegance of line typical of this [SACM] builder), the locomotives pulled 320 tons up a 0.9% grade at 60 km/h (37.3 mph) and exceeded 90 km/h (55.9 mph) on the flat with the same load.

Tube and flue diameters are interior measurement; external diameters were 55 mm (2.04") and 133 mm (5.24"), respectively.

(NB: El Duque de Zaragoza's full name was Don JosT Mencos Rebolledo de Palafox, Duque de Zaragoza, Marquis de Lazon, Conde de Los Arcos y Marquis de Caizar, Grande de Espana,)

Zaragoza observed that the Segovia route was "a very hard one". From Madrid to la Canada, which crossed the Guadarrama range, the line ascended 770 m (2,526 ft) in 98 km (60.9 miles)

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID3362
Number in Class16
Road Numbers3001-3016/230-4001--230-4016
Number Built16
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)12.47 / 3.80
Engine Wheelbase (ft / m)32.97 / 10.05
Ratio of driving wheelbase to overall engine wheelbase 0.38
Overall Wheelbase (engine & tender) (ft / m)60.53 / 18.45
Axle Loading (Maximum Weight per Axle) (lbs / kg)34,540 / 15,667
Weight on Drivers (lbs / kg)103,617 / 47,000
Engine Weight (lbs / kg)174,165 / 79,000
Tender Loaded Weight (lbs / kg)110,231 / 50,000
Total Engine and Tender Weight (lbs / kg)284,396 / 129,000
Tender Water Capacity (gals / ML)5721 / 21.67
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 7.70 / 7
Minimum weight of rail (calculated) (lb/yd / kg/m)58 / 29
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)68.90 / 1750
Boiler Pressure (psi / kPa)227.70 / 15.70
High Pressure Cylinders (dia x stroke) (in / mm)14.57" x 25.2" / 370x640
Low Pressure Cylinders (dia x stroke) (in / mm)22.44" x 25.2" / 570x640
Tractive Effort (lbs / kg)21,142 / 9589.86
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.90
Heating Ability
Tubes (number - dia) (in / mm)142 - 1.969" / 50
Flues (number - dia) (in / mm)24 - 4.921" / 125
Flue/Tube length (ft / m)17.39 / 5.30
Firebox Area (sq ft / m2)166.84 / 15.50
Grate Area (sq ft / m2)44.13 / 4.10
Evaporative Heating Surface (sq ft / m2)1976 / 183.61
Superheating Surface (sq ft / m2)603 / 56
Combined Heating Surface (sq ft / m2)2579 / 239.61
Evaporative Heating Surface/Cylinder Volume406.34
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation10,048
Same as above plus superheater percentage12,360
Same as above but substitute firebox area for grate area46,727
Power L118,672
Power MT1191.83

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