Data from P C D [P C Dewhurst?], "The Midland and Great Northern Joint Railway and its Locomotives", Locomotive Magazine, Volume 27 (15 April 1921), pp. 107-108. Works numbers were 333 and 338 n 1877.
These saddle tanks--Ormesby and Stalham--were delivered to the GY&SLR. After a few years that railway was absorbed by the Eastern & Midlands in 1883. The E & M evolved into the Midlands & Great Northern Joint Railway in 1894 and finally the LNER took over the M & GN in 1936.
The Ormesby had been sold long since (in 1901) to a colliery in the North of England.. The second of the class -- Stalham -- remained in service for 60 years; see Locobase 5895.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Ormesby |
| Locobase ID | 20872 |
| Railroad | Great Yarmouth & Stalham Light Rwy |
| Country | Great Britain |
| Whyte | 0-6-0ST |
| Number in Class | 2 |
| Road Numbers | 15-16 |
| Gauge | Std |
| Number Built | 2 |
| Builder | Fox, Walker & Co |
| Year | 1877 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 9.75 / 2.97 |
| Engine Wheelbase (ft / m) | 9.75 / 2.97 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 9.75 / 2.97 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 54,880 / 24,893 |
| Engine Weight (lbs / kg) | 54,880 / 24,893 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 660 / 2.50 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.40 / 1.30 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 30 / 15 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42.20 / 1072 |
| Boiler Pressure (psi / kPa) | 140 / 970 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 13" x 20" / 330x508 |
| Tractive Effort (lbs / kg) | 9531 / 4323.19 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.76 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 108 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 8.33 / 2.54 |
| Firebox Area (sq ft / m2) | 48.50 / 4.51 |
| Grate Area (sq ft / m2) | 7.50 / 0.70 |
| Evaporative Heating Surface (sq ft / m2) | 459 / 42.64 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 459 / 42.64 |
| Evaporative Heating Surface/Cylinder Volume | 149.39 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1050 |
| Same as above plus superheater percentage | 1050 |
| Same as above but substitute firebox area for grate area | 6790 |
| Power L1 | 2248 |
| Power MT | 270.92 |