Rhymney 2-4-0 Locomotives in Great_Britain
Class Details by Steve Llanso of Sweat House Media
Class 7 (Locobase 20456)
Data from "The Rhymney Ry. And Its Engines," Locomotive Magazine, Volume XXI [21] (15 November 1915), pp. 201-202; and the Vulcan Foundry drawing archived at [
], last accessed 29 October 2018. Works numbers were 419-421 in 1857.
These were the first passenger locomotives to enter service with the Rhymney Railway, being the next three engines completed by Vulcan after the first six goods locomotives described in Locobase 20455. Its passenger orientation is apparent in the 8" (203 mm) taller drivers. Trailing load consisted of stubby four-wheel carriages produced by Williams of Goswell Road in London and included both passenger accommodation and Royal Mail vans.
In 1880-1881, the 7-9 were converted to saddle-tank 2-4-0s. In that configuration, the class continued in service until 1894.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 7 |
| Locobase ID | 20456 |
| Railroad | Rhymney |
| Country | Great Britain |
| Whyte | 2-4-0 |
| Number in Class | 3 |
| Road Numbers | 7-9 |
| Gauge | Std |
| Number Built | 3 |
| Builder | Vulcan Foundry |
| Year | 1858 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 8.08 / 2.46 |
| Engine Wheelbase (ft / m) | 14.50 / 4.42 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.56 |
| Overall Wheelbase (engine & tender) (ft / m) | 32.71 / 9.97 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1200 / 4.55 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 63 / 1600 |
| Boiler Pressure (psi / kPa) | 140 / 970 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 20" / 406x508 |
| Tractive Effort (lbs / kg) | 9671 / 4386.70 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 173 - 1.875" / 48 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.29 / 3.14 |
| Firebox Area (sq ft / m2) | 75.50 / 7.01 |
| Grate Area (sq ft / m2) | 14.60 / 1.36 |
| Evaporative Heating Surface (sq ft / m2) | 948 / 88.07 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 948 / 88.07 |
| Evaporative Heating Surface/Cylinder Volume | 203.69 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2044 |
| Same as above plus superheater percentage | 2044 |
| Same as above but substitute firebox area for grate area | 10,570 |
| Power L1 | 4186 |
| Power MT | |