CEMR 4-8-4 Locomotives in Spain
Class Details by Steve Llanso of Sweat House Media
Class 203 (Locobase 4848)
Data from [
] . Works numbers were 20053 in 1929, 22474 in 1934, and 23278 in 1936.
This Northern tank is probably the tank engine confrere of the Mikado tender engines delivered several years earlier. Like the Mikes, these Belpaire-boiler locomotives had a minimum curve radius was 90 metres, probably because the first and last driving axles were allowed considerable lateral movement.
They probably used the same boiler, although Locobase can't confirm that. All had a maximum speed of 40 kmh (25 mph).
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 203 |
| Locobase ID | 4848 |
| Railroad | CEMR |
| Country | Spain |
| Whyte | 4-8-4T |
| Number in Class | 3 |
| Road Numbers | 203-205 |
| Gauge | metre |
| Number Built | |
| Builder | Henschel & Sohn |
| Year | 1929 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 125,663 / 57,000 |
| Engine Weight (lbs / kg) | 191,802 / 87,000 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 191,802 / 87,000 |
| Tender Water Capacity (gals / ML) | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 52 / 26 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 41.70 / 1060 |
| Boiler Pressure (psi / kPa) | 171.10 / 1180 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 20.47" x 21.26" / 520x540 |
| Tractive Effort (lbs / kg) | 31,069 / 14092.68 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.04 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 34.44 / 3.20 |
| Evaporative Heating Surface (sq ft / m2) | |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | |
| Evaporative Heating Surface/Cylinder Volume | |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5893 |
| Same as above plus superheater percentage | 5893 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |