Data from E L Ahrons, "The Locomotives of the Glagow & South Western Railway", Locomotive Magazine, Volume XXVIII [28] (15 May 1922), p. 141.Works numbers were 1-13 in 1853-1855
Ahrons reported that these locally produced singles appeared in Daniel Kinnear Clark's account of tests measuring the evaporative performance of boilers.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 2/77 |
| Locobase ID | 20944 |
| Railroad | Glasgow, Dumfries & Carlisle |
| Country | Great Britain |
| Whyte | 2-2-2 |
| Number in Class | 13 |
| Road Numbers | 77-85 |
| Gauge | Std |
| Number Built | 13 |
| Builder | Kinmond, Hutton & Steel |
| Year | 1848 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | 12.33 / 3.76 |
| 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) | |
| Engine Weight (lbs / kg) | 42,560 / 19,305 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 72 / 1829 |
| Boiler Pressure (psi / kPa) | 130 / 900 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 20" / 381x508 |
| Tractive Effort (lbs / kg) | 6906 / 3132.51 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 107 - 2.125" / 54 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.50 / 3.20 |
| Firebox Area (sq ft / m2) | 64 / 5.95 |
| Grate Area (sq ft / m2) | |
| Evaporative Heating Surface (sq ft / m2) | 689 / 64.01 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 689 / 64.01 |
| Evaporative Heating Surface/Cylinder Volume | 168.43 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | |
| Same as above plus superheater percentage | |
| Same as above but substitute firebox area for grate area | 8320 |
| Power L1 | 3848 |
| Power MT | |