Data from Wiener (1930). Martin Coombs, Chilean steam locomotive list, Part 3-Metre Gauge (March 2022), downloaded [], p. 32.
Martin Coombs notes the comment in Wiener concerning this Prairie Mallet designer, which Wiener speculated the class would be identical to those delivered by Alco and Henschel to Brazil in the same years except for the superheaters in these engines.
Coombs traces the order back to a 1913 table showing the Howard Syndicate's plan to buy four more Mallets.Apparently, he could find no evidence of a builder or a delivery schedule and concluded that the order had never been placed.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | see comment |
| Locobase ID | 3607 |
| Railroad | Chilean State Railways (EFE) |
| Country | Chile |
| Whyte | 2-6-6-2 |
| Number in Class | |
| Road Numbers | na |
| Gauge | Metre |
| Number Built | |
| Builder | na |
| Year | 1913 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 8 / 2.44 |
| Engine Wheelbase (ft / m) | 36 / 10.97 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.22 |
| Overall Wheelbase (engine & tender) (ft / m) | 60.17 / 18.34 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 131,000 / 59,421 |
| Engine Weight (lbs / kg) | 157,000 / 71,214 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 4000 / 15.15 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1800 / 6813 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 36 / 18 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42 / 1067 |
| Boiler Pressure (psi / kPa) | 204.50 / 1410 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 20" / 406x508 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 25.5" x 20" / 648x508 |
| Tractive Effort (lbs / kg) | 30,409 / 13793.31 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.31 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 121 - 2" / 51 |
| Flues (number - dia) (in / mm) | 16 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 17 / 5.18 |
| Firebox Area (sq ft / m2) | 113 / 10.50 |
| Grate Area (sq ft / m2) | 32 / 2.97 |
| Evaporative Heating Surface (sq ft / m2) | 1525 / 141.73 |
| Superheating Surface (sq ft / m2) | 310 / 28.81 |
| Combined Heating Surface (sq ft / m2) | 1835 / 170.54 |
| Evaporative Heating Surface/Cylinder Volume | 327.66 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 6544 |
| Same as above plus superheater percentage | 7656 |
| Same as above but substitute firebox area for grate area | 27,037 |
| Power L1 | 5909 |
| Power MT | 596.66 |