Data from compilation of Garratt data posted by Gavin Hamilton at [] (6 September 2005). See also Roger E. West's article on the William Francis originally published in The Industrial Railway Record (No 11 - September 1966) and archived online at [
] 22 July 2004).Works number was 6779 in 1934..
This was one of three standard-gauge Garrtts produced for British industrial users to the same design as the first (Locobase 641). The owner was based in Cardiff and had only recently )improved its market position when predecessor Guest Keen and Nettlefolds acquired the rival Baldwins steel concern. They continued focusing on steel production into the 1950s and operated this Garratt until 1958.
Much later, the international conglomerate GKN could trace its roots to Guest Keen.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | 12 |
Locobase ID | 500 |
Railroad | Guest Keen & Baldwins |
Country | Great Britain |
Whyte | 0-4-0+0-4-0 |
Number in Class | 1 |
Road Numbers | 12 |
Gauge | Std |
Number Built | 1 |
Builder | Beyer, Peacock |
Year | 1934 |
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) | 36,960 / 16,765 |
Weight on Drivers (lbs / kg) | 137,760 / 62,487 |
Engine Weight (lbs / kg) | 137,760 / 62,487 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | |
Tender Water Capacity (gals / ML) | 1658 / 6.28 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.70 / 2 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 57 / 28.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 40 / 1016 |
Boiler Pressure (psi / kPa) | 185 / 1280 |
High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 20" / 356x508 (4) |
Tractive Effort (lbs / kg) | 30,821 / 13980.19 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.47 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 288 - 1.75" / 44 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 9.83 / 2.90 |
Firebox Area (sq ft / m2) | 107 / 9.94 |
Grate Area (sq ft / m2) | 22.70 / 2.11 |
Evaporative Heating Surface (sq ft / m2) | 1406 / 130.62 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 1406 / 130.62 |
Evaporative Heating Surface/Cylinder Volume | 197.28 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 4200 |
Same as above plus superheater percentage | 4200 |
Same as above but substitute firebox area for grate area | 19,795 |
Power L1 | 3359 |
Power MT | 215.02 |