Data from Wiener (1930) and Gavin Hamilton's excellent compilation of Garratt data posted at [] . (6 September 2005). See also Andrew Howard, "Potteries Loop Line - Background, Description and Train Services", accessed 16 January 2018 at [],%20Description,%20and%20Train%20Services.pdf; and Fred Hughes, "Explosion at Sneyd Colliery on New Year's Day 1942", on the Potteries.org website, last accessed 16 January 2018 at [] . Works number was 6729 in 1931.
This was one of three standard-gauge Garrtts produced for British industrial users to the same design as the first (Locobase 641).
Howard's account of the well-traveled Loop Line includes a description of the Sneyd Colliery operation, which he notes had been open since the 18th Century. Sneyd Colliery Ltd was formed in 1900 and "was a progressive and well-equipped operation and it was unfortunate that it was the site of the worst mining disaster in North Staffordshire". [thepotteries.org story by Fred Hughes describes the internal explosion that killed 57 men and boys on 1 January 1942.].
Howard wrote that the internal Sneyd Colliery line crossed the Loop Line at two points and the internal line, challenged by a sloping site, occasionally presented 1 in 20 (5%) grades. The 3 generated the power necessary to "do the heavy shunting."
It was scrapped after 1962.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 3 |
| Locobase ID | 502 |
| Railroad | Sneyd Colliery, Burslem |
| Country | Great Britain |
| Whyte | 0-4-0+0-4-0 |
| Number in Class | 1 |
| Road Numbers | 3 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Beyer, Peacock |
| Year | 1931 |
| 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) | 1656 / 6.27 |
| 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) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 13.5" x 20" / 343x508 (4) |
| Tractive Effort (lbs / kg) | 27,884 / 12647.98 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.94 |
| 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 / 130.67 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1406 / 130.67 |
| Evaporative Heating Surface/Cylinder Volume | 212.17 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4086 |
| Same as above plus superheater percentage | 4086 |
| Same as above but substitute firebox area for grate area | 19,260 |
| Power L1 | 3515 |
| Power MT | 225.01 |