See data from "Ten-Wheeled Tank Engines", Railway Engineer, Volume 20, No 1 (January 1899), pp. 10-13; and Locobase 3246 for an outline of the Mersey Railway tunnel. (Thanks to Alexander Blessing for his 30 November 2022 email pointing out road numbers, valve gear, the correct water tank capacity. He also suggested a third MTR entry to cover the Kitsons; see Locobase ) Works numbers were 2865-2870 in 1887-1888.
A double-ender design from Beyer, Peacock that introduced the Prairie tank wheel arrangement to Britain, this design was a bit smaller than the earlier 0-6-4T (Locobase 3246). The firebox had a deeply sloping grate to clear the rear driving axle. Their American-style trucks proved susceptible to breakage. (Three more tanks from Kitson's (works numbers 3393-3395) in 1892 appear in Locobase 21102.)
Between November 1903 and January 1905, the Mersey Tunnel management sold all seven Prairie tanks to the Alexandra (Newport and South Wales) Docks and Railway system. At the time of Grouping (for GWR, 22 March 1922), all seven were taken into GWR Docks. By 1932, all had been withdrawn.
See data from "Ten-Wheeled Tank Engines", Railway Engineer, Volume 20, No 1 (January 1899), pp. 10-13. and Locobase 3246 for an outline of the Mersey Railway tunnel.. (Thanks to Alexander Blessing for his 30 November 2022 email for a third MTR entry to cover these Kitsons). Works numbers were 3393-3395 in 1892.
When the MTR bought more tunnel locomotives to accompany the 0-6-4Ts (Locobase 3246), they bought "Prairie" tanks from two builders. The Beyer, Peacock engines appear in Locobase 3650.
Ordered from Kitson's four years after the "Peacocks", the engines bore a law firm--Burcot, Burnley, and Bansted--for their names. The Ten-Wheeled Tank Engines editor claimed they differed "in every way from the Peacocks." They used a radial axle for the leading truck to avoid the radius bar breakage of the American-style trucks of the Beyer's engines. The cylinders drove the center coupled axle and crossheads worked between two slide bars.
Between November 1903 and January 1905, the Mersey Tunnel management sold all seven Prairie tanks to the Alexandra (Newport and South Wales) Docks and Railway system. At the time of Grouping (for GWR, 22 March 1922), all seven were taken into GWR Docks. By 1932, all had been withdrawn.
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | Class 2 | Class 3 |
Locobase ID | 3650 | 21102 |
Railroad | Mersey Tunnel Railway | Mersey Tunnel Railway |
Country | Great Britain | Great Britain |
Whyte | 2-6-2T | 2-6-2T |
Number in Class | 6 | 3 |
Road Numbers | 10-15 | 16-18 |
Gauge | Std | Std |
Number Built | 6 | 3 |
Builder | several | Kitson & Co |
Year | 1887 | 1892 |
Valve Gear | Stephenson | Stephenson |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 11.50 / 3.54 | 11.50 / 3.51 |
Engine Wheelbase (ft / m) | 27.50 / 8.38 | 27.50 / 8.38 |
Ratio of driving wheelbase to overall engine wheelbase | 0.42 | 0.42 |
Overall Wheelbase (engine & tender) (ft / m) | 27.50 / 8.38 | |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
Weight on Drivers (lbs / kg) | 99,344 / 45,062 | 99,344 / 45,062 |
Engine Weight (lbs / kg) | 140,000 / 63,503 | 151,200 / 68,583 |
Tender Loaded Weight (lbs / kg) | ||
Total Engine and Tender Weight (lbs / kg) | 140,000 / 63,503 | 151,200 / 68,583 |
Tender Water Capacity (gals / ML) | 1372 / 4.36 | 1372 / 5.20 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | ||
Minimum weight of rail (calculated) (lb/yd / kg/m) | 55 / 27.50 | 55 / 27.50 |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 55.50 / 1410 | 55.50 / 1410 |
Boiler Pressure (psi / kPa) | 150 / 1030 | 150 / 1030 |
High Pressure Cylinders (dia x stroke) (in / mm) | 19" x 26" / 483x660 | 19.5" x 26" / 495x660 |
Tractive Effort (lbs / kg) | 21,562 / 9780.37 | 22,712 / 10302.00 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.61 | 4.37 |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 189 - 2" / 0 | 189 - 2" / 51 |
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | 10.17 / 3.10 | 10.17 / 3.10 |
Firebox Area (sq ft / m2) | 113.80 / 10.58 | 122.78 / 11.41 |
Grate Area (sq ft / m2) | 24.50 / 2.28 | 24.98 / 2.32 |
Evaporative Heating Surface (sq ft / m2) | 1149 / 106.78 | 1157 / 107.49 |
Superheating Surface (sq ft / m2) | ||
Combined Heating Surface (sq ft / m2) | 1149 / 106.78 | 1157 / 107.49 |
Evaporative Heating Surface/Cylinder Volume | 134.67 | 128.74 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 3675 | 3747 |
Same as above plus superheater percentage | 3675 | 3747 |
Same as above but substitute firebox area for grate area | 17,070 | 18,417 |
Power L1 | 2794 | 2734 |
Power MT | 186.01 | 182.02 |