Data from "New 6-Cpld Tank Locomotive, Metropolitan Ry", The Locomotive Magazine, Vol VI (May 1901), p. 80
These were essentially E-class 0-4-4T tanks with an additional driving axle and smaller drivers to muscle the freight movements through a very busy and dense network. The quartet obviously suited the railway as they served the Metropolitan and its successor London Transport until 1957-1964.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | F |
| Locobase ID | 10184 |
| Railroad | Metropolitan |
| Country | Great Britain |
| Whyte | 0-6-2T |
| Number in Class | 4 |
| Road Numbers | 90-93 / L49-l52 |
| Gauge | Std |
| Number Built | 4 |
| Builder | Yorkshire Engine |
| Year | 1901 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 16 / 4.88 |
| Engine Wheelbase (ft / m) | 22 / 6.71 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.73 |
| Overall Wheelbase (engine & tender) (ft / m) | 22 / 6.71 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | 129,920 / 58,931 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 129,920 / 58,931 |
| Tender Water Capacity (gals / ML) | 1716 / 6.50 |
| 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) | 60 / 1524 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17.5" x 26" / 445x660 |
| Tractive Effort (lbs / kg) | 20,304 / 9209.75 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 219 - 1.875" / 48 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 100 / 9.29 |
| Grate Area (sq ft / m2) | 17.90 / 1.66 |
| Evaporative Heating Surface (sq ft / m2) | 1150 / 106.88 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1150 / 106.88 |
| Evaporative Heating Surface/Cylinder Volume | 158.88 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3222 |
| Same as above plus superheater percentage | 3222 |
| Same as above but substitute firebox area for grate area | 18,000 |
| Power L1 | 4103 |
| Power MT | |