Data from "New Engines, Buenos Ayres Great Southern Ry," Locomotive Magazine, Volume 18 (15 July 1912), pp. 143-144; and "Six-Coupled Locomotives for the Buenos Aires Great Southern Railway Co., Ltd", Locomotive News and Railway Contractor, Volume XI [11], No. 5 (10 March 1922), pp. 156-157. Works numbers were 5521-5522, 5580-5589, 5652-5661 in 1912..
The LNRC report includes a photograph that showed an classic British engine having an upright profile with deep Belpaire firebox, slender, bullet-shaped dome. The superheater dictated the use of piston valves.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 3106 |
| Locobase ID | 20046 |
| Railroad | Buenos Ayres Great Southern |
| Country | Argentina |
| Whyte | 2-6-0 |
| Number in Class | 22 |
| Road Numbers | 3106 |
| Gauge | 5'6" |
| Number Built | 22 |
| Builder | Beyer, Peacock |
| Year | 1912 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 13 / 3.96 |
| Engine Wheelbase (ft / m) | 21.92 / 6.68 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.59 |
| Overall Wheelbase (engine & tender) (ft / m) | 45.87 / 13.98 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 94,304 / 42,776 |
| Engine Weight (lbs / kg) | 116,032 / 52,631 |
| Tender Loaded Weight (lbs / kg) | 101,340 |
| Total Engine and Tender Weight (lbs / kg) | 217,372 / 52,631 |
| Tender Water Capacity (gals / ML) | 4200 / 15.91 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 7.80 / 7.10 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 52 / 26 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 68 / 1727 |
| Boiler Pressure (psi / kPa) | 150 / 1030 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 19" x 26" / 483x660 |
| Tractive Effort (lbs / kg) | 17,599 / 7982.78 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.36 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 132 - 1.875" / 48 |
| Flues (number - dia) (in / mm) | 21 - 5.25" / 133 |
| Flue/Tube length (ft / m) | 11 / 3.35 |
| Firebox Area (sq ft / m2) | 115 / 10.68 |
| Grate Area (sq ft / m2) | 22.20 / 2.06 |
| Evaporative Heating Surface (sq ft / m2) | 1141 / 106 |
| Superheating Surface (sq ft / m2) | 245 / 22.76 |
| Combined Heating Surface (sq ft / m2) | 1386 / 128.76 |
| Evaporative Heating Surface/Cylinder Volume | 133.73 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3330 |
| Same as above plus superheater percentage | 3929 |
| Same as above but substitute firebox area for grate area | 20,355 |
| Power L1 | 7812 |
| Power MT | 547.88 |