Data from SACM diagram Nr.80 from Societe Alsacienne de Constructions Mecaniques from locomotive book supplied by Dany Machi up at [] as
Diagrammes des machines SACM construites a GRAFENSTADEN (October 2007); supplemented and amended by "Locomotivas de Vapor de Via Larga"p.33 , posted Posted by Guarda Freio at 18:01, 23 September 2018, at [], last accessed 25 January 2026. Works numbers were 3825-3832 in 1887, 3858 in 1888, 3859--3861 in 1889, and 4122-4123 in 1890..
Tube diameter is the interior measurement. The diagram show a long, low boiler with Belpaire firebox and a big steam dome just behind the stack. Comboios de Portugal (CP) records indicate that these fourteen engines were the only all-adhesion 8-coupleds on the roster.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 201/601/ |
| Locobase ID | 15519 |
| Railroad | Companhia Real dos Caminhos de Ferro Portugueses (CP) |
| Country | Portugal |
| Whyte | 0-8-0 |
| Number in Class | 14 |
| Road Numbers | 201-214/601-614 |
| Gauge | Std |
| Number Built | 14 |
| Builder | SACM |
| Year | 1887 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 13.55 / 4.13 |
| Engine Wheelbase (ft / m) | 13.55 / 4.13 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 36.61 / 11.16 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 106,704 / 48,400 |
| Engine Weight (lbs / kg) | 106,704 / 48,400 |
| Tender Loaded Weight (lbs / kg) | 53,352 / 24,200 |
| Total Engine and Tender Weight (lbs / kg) | 160,056 / 72,600 |
| Tender Water Capacity (gals / ML) | 2112 / 8 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5.50 / 5 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 44 / 22 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 51.20 / 1300 |
| Boiler Pressure (psi / kPa) | 144 / 980 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 19.69" x 25.98" / 500x660 |
| Tractive Effort (lbs / kg) | 24,079 / 10922.06 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.43 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 208 - 1.772" / 45 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 16.96 / 5.17 |
| Firebox Area (sq ft / m2) | 104.41 / 9.70 |
| Grate Area (sq ft / m2) | 22.71 / 2.11 |
| Evaporative Heating Surface (sq ft / m2) | 1758 / 163.30 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1758 / 163.30 |
| Evaporative Heating Surface/Cylinder Volume | 192.00 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3270 |
| Same as above plus superheater percentage | 3270 |
| Same as above but substitute firebox area for grate area | 15,035 |
| Power L1 | 3060 |
| Power MT | 252.89 |