Data from [], last accessed 20 April 2018.
This tiny well tanker served the RAF until 1945 at Calshot Spit, Southampton. Talyllyn Railway in western Wales received it as a gift in 1953. According to [] website, an overhaul changed the gauge to the Talyllyn's 2'3". The locomotive entered service in 1954 dubbed "Douglas".
After a while, Douglas went into reserve, only to be resurrected in 1995, fitted with a new boiler, and a livery representing the Air Ministry Works & Buildings. Talyllyn's website reported that "On 21st February 2018, it was the 100th Birthday of 'Douglasñ. To commemorate the centenary a new livery reflecting its RAF heritage was commissioned."
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 4919 |
| Railroad | Airservice Construction Corps |
| Country | Great Britain |
| Whyte | 0-4-0WT |
| Number in Class | 1 |
| Road Numbers | |
| Gauge | 2' |
| Number Built | 1 |
| Builder | Andrew Barclay |
| Year | 1918 |
| Valve Gear | |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 3.94 / 1.20 |
| Engine Wheelbase (ft / m) | 3.94 / 1.20 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 17,920 / 8128 |
| Engine Weight (lbs / kg) | 17,920 / 8128 |
| 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) | 15 / 7.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 24 / 610 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 6.88" x 10.75" / 175x273 |
| Tractive Effort (lbs / kg) | 2883 / 1307.71 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 6.22 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | |
| Evaporative Heating Surface (sq ft / m2) | 130 / 12.08 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 130 / 12.08 |
| Evaporative Heating Surface/Cylinder Volume | 281.05 |
| 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 | |
| Power L1 | |
| Power MT | |