Several 4-8-4 Locomotives in Spain


Class Details by Steve Llanso of Sweat House Media

Class 242-0205/242-0211 y 242-221 (Locobase 3340)

Data from [] and

[] (28 April 2003) reproduced the diagrama with all dimensions and weights ,

Four railroads bought locomotives of this exact design. Medina a Zamora y de Orense a Vigo (Oeste) obtained four (MTM works numbers 147, 149, 152, 163 in 1923), FC Estado 2, Alcaniz a Puebla de Hijar 1. and Murcia a Mula y Caravaca 1.

NB: RENFE's 1947 diagram shows the exterior diameter of the 143 small tubes and 22 large tubes, but gives the following heating surface areas based on the tubes' interior diameters: tubes and flues , 143.20 sq m (1,636 sq ft) and, including firebox area, 156.70 sq m (1,687 sq ft).

Principal Dimensions by Steve Llanso of Sweat House Media

Class242-0205/242-0211 y 242-221
Locobase ID3340
RailroadSeveral
CountrySpain
Whyte4-8-4T
Number in Class8
Road Numbers965-968, 3 and 6, 1, 5/242-0205 a 242-0211 y0242
Gauge5'6"
Number Built8
BuilderMTM
Year1923
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)16.24 / 4.95
Engine Wheelbase (ft / m)39.80 / 12.13
Ratio of driving wheelbase to overall engine wheelbase 0.41
Overall Wheelbase (engine & tender) (ft / m)39.80 / 12.13
Axle Loading (Maximum Weight per Axle) (lbs / kg)33,069 / 15,000
Weight on Drivers (lbs / kg)132,277 / 60,000
Engine Weight (lbs / kg)216,053 / 98,000
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)216,053 / 98,000
Tender Water Capacity (gals / ML)2859 / 10.83
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 3.90 / 4
Minimum weight of rail (calculated) (lb/yd / kg/m)55 / 27.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)59.10 / 1501
Boiler Pressure (psi / kPa)174 / 12
High Pressure Cylinders (dia x stroke) (in / mm)21.65" x 25.59" / 550x650
Tractive Effort (lbs / kg)30,017 / 13615.50
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.41
Heating Ability
Tubes (number - dia) (in / mm)143 - 1.969" / 50
Flues (number - dia) (in / mm)22 - 5.236" / 133
Flue/Tube length (ft / m)15.75 / 4.80
Firebox Area (sq ft / m2)145.31 / 13.50
Grate Area (sq ft / m2)33.37 / 3.10
Evaporative Heating Surface (sq ft / m2)1781 / 165.46
Superheating Surface (sq ft / m2)490 / 45.52
Combined Heating Surface (sq ft / m2)2271 / 210.98
Evaporative Heating Surface/Cylinder Volume163.34
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5806
Same as above plus superheater percentage7084
Same as above but substitute firebox area for grate area30,846
Power L110,874
Power MT724.93

All material Copyright © SteamLocomotive.com
Wes Barris