Dunn & Shute, contractors 0-4-0 Locomotives in Great_Britain
Class Details by Steve Llanso of Sweat House Media
Class Trojan (Locobase 7488)
Data from F W Harman "Trojan", The Industrial Railway Record #48 (June, 1973) pp 52-55 as reproduced on the IR Society's website [
] (accessed 9 May 2006).
Harman notes that Trojan and a sister were built on speculation by Avonside in 1897-1898 to their order number 940 as works #1386-1387. Both sold quickly. The latter engine was named WHITEHALL by its new owner J & G Joicey & Co, who operated it in County Durham at the Handen Hold Colliery (Puns on that name must abound.). WHITEHALL was scrapped in the 1930s.
TROJAN served the Town Dock at Newport under several successor owners including Alexandra Docks (1903) and the Great Western (1922) as GWR's 1340 until its retirement in July 1932. Bought in 1934 by Victoria Colliery, by which time it had a new boiler with a smaller dome, TROJAN served several collieries until JB True bought it in March 1968 to preserve it. According to the Didcot Society's 2005 listing ([], accessed 12 March 2006), TROJAN didn't actually operate until 2002.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Trojan |
| Locobase ID | 7488 |
| Railroad | Dunn & Shute, contractors |
| Country | Great Britain |
| Whyte | 0-4-0ST |
| Number in Class | 2 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 2 |
| Builder | Avonside |
| Year | 1897 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 5.50 / 1.68 |
| Engine Wheelbase (ft / m) | 5.50 / 1.68 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 5.50 / 1.68 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 51,184 / 23,217 |
| Engine Weight (lbs / kg) | 51,184 / 23,217 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 51,184 / 23,217 |
| Tender Water Capacity (gals / ML) | 756 / 2.86 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 0.60 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 43 / 21.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 39 / 991 |
| Boiler Pressure (psi / kPa) | 140 / 970 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 20" / 356x508 |
| Tractive Effort (lbs / kg) | 11,961 / 5425.42 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.28 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 113 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 8 / 2.44 |
| Firebox Area (sq ft / m2) | 52 / 4.83 |
| Grate Area (sq ft / m2) | 8.25 / 0.77 |
| Evaporative Heating Surface (sq ft / m2) | 466 / 43.29 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 466 / 43.29 |
| Evaporative Heating Surface/Cylinder Volume | 130.77 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1155 |
| Same as above plus superheater percentage | 1155 |
| Same as above but substitute firebox area for grate area | 7280 |
| Power L1 | 1854 |
| Power MT | 159.71 |