Data from Vulcan Foundry Magazine ([], accessed 14 July 2007). Boiler pressure is an estimate.
The third of this trio of locomotives (the other two are described in Locobase 8573) differed from the first two in that it had larger and fewer tubes. Otherwise, it was similar in having the two domes, one over the firebox and the other over the tubes just behind the tall stack. It also had large carrying wheels closely spaced with the drivers and cylinders inclined slightly below the horizontal axis. The firebox hung down between the drivers and the rear axles.
Data from Vulcan Foundry Magazine ([], accessed 14 July 2007). Boiler pressure is an estimate.
The first two were supplied to the D & J along with a third that had a different tube layout (see Locobase 8574). The design sported two domes, one over the firebox and the other over the tubes just behind the tall stack. It also had large carrying wheels closely spaced with the drivers and cylinders inclined slightly below the horizontal axis. The firebox hung down between the drivers and the rear axles.
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | Birmingham | Derby |
Locobase ID | 8574 | 8573 |
Railroad | Birmingham & Derby Junction | Birmingham & Derby Junction |
Country | Great Britain | Great Britain |
Whyte | 2-2-2 | 2-2-2 |
Number in Class | 1 | 2 |
Road Numbers | 77 | 75 |
Gauge | Std | Std |
Number Built | 1 | 2 |
Builder | Charles Tayleur & Co | Charles Tayleur & Co |
Year | 1839 | 1839 |
Valve Gear | ||
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) | ||
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) | ||
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) | 66 / 1676 | 66 / 1676 |
Boiler Pressure (psi / kPa) | 50 / 340 | 50 / 340 |
High Pressure Cylinders (dia x stroke) (in / mm) | 12" x 18" / 305x457 | 12" x 18" / 305x457 |
Tractive Effort (lbs / kg) | 1669 / 757.05 | 1669 / 757.05 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | ||
Heating Ability | ||
Tubes (number - dia) (in / mm) | 94 - 2" / 51 | 121 - 1.625" / 41 |
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | ||
Firebox Area (sq ft / m2) | 53.75 / 5 | 53.75 / 5 |
Grate Area (sq ft / m2) | 8.75 / 0.81 | 8.75 / 0.81 |
Evaporative Heating Surface (sq ft / m2) | 470 / 43.68 | 490 / 45.54 |
Superheating Surface (sq ft / m2) | ||
Combined Heating Surface (sq ft / m2) | 470 / 43.68 | 490 / 45.54 |
Evaporative Heating Surface/Cylinder Volume | 199.47 | 207.96 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 438 | 438 |
Same as above plus superheater percentage | 438 | 438 |
Same as above but substitute firebox area for grate area | 2688 | 2688 |
Power L1 | 1724 | 1771 |
Power MT |