Data from "Bogie Tank Locomotive, SE&CR," The Locomotive Magazine, Volume VI (February 1901), p. 21.
Designed by Harry Wainwright, these were put into service on the Metropolitan suburban section. They had exhaust steam condensers that recycled the vapor into the side tanks.
Data from "Bogie Tank Locomotive, SE&CR," The Locomotive Magazine, Volume VI (February 1901), p. 21; and Wikipedia's "SECR H class" entry at []; and the Southern Railway E-Group entry "Wainwright H class 0-4-4T" at [] , both last accessed 28 March 2019.
Harry Wainwright identified an "urgent need" for a medium-sized passenger tank locomotive in the early years of the 20th Century, says the SEMG's entry. He only had to look at A/A1/A2 class originally built for London, Chatham & Dover beginning in 1875.
The first 64 were completed between 1904 and 1905 with Wainwright adding two more in 1915.
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | 710 | H |
Locobase ID | 10169 | 20529 |
Railroad | South Eastern & Chatham | South Eastern & Chatham |
Country | Great Britain | Great Britain |
Whyte | 0-4-4T | 0-4-4T |
Number in Class | 66 | |
Road Numbers | 710 | 540+ |
Gauge | Std | Std |
Number Built | 66 | |
Builder | SECR | Ashford |
Year | 1900 | 1904 |
Valve Gear | Stephenson | Stephenson |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 7 / 2.13 | |
Engine Wheelbase (ft / m) | 21.83 / 6.65 | |
Ratio of driving wheelbase to overall engine wheelbase | 0.32 | |
Overall Wheelbase (engine & tender) (ft / m) | 21.83 / 6.65 | |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 35,840 / 16,257 | 37,632 / 17,070 |
Weight on Drivers (lbs / kg) | 70,112 / 31,802 | 75,264 / 34,139 |
Engine Weight (lbs / kg) | 115,248 / 52,276 | 121,856 / 55,273 |
Tender Loaded Weight (lbs / kg) | ||
Total Engine and Tender Weight (lbs / kg) | 115,248 / 52,276 | 121,856 / 55,273 |
Tender Water Capacity (gals / ML) | 1320 / 5 | 1620 / 6.14 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2.80 / 3 | 1.65 / 1.50 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 58 / 29 | 63 / 31.50 |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 66 / 1676 | 66 / 1676 |
Boiler Pressure (psi / kPa) | 160 / 1100 | 160 / 1100 |
High Pressure Cylinders (dia x stroke) (in / mm) | 17.5" x 24" / 445x610 | 18" x 26" / 457x660 |
Tractive Effort (lbs / kg) | 15,145 / 6869.66 | 17,359 / 7873.92 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.63 | 4.34 |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 116 - 2" / 51 | |
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | ||
Firebox Area (sq ft / m2) | 100.60 / 9.35 | 102.25 / 9.50 |
Grate Area (sq ft / m2) | 16.25 / 1.51 | 16.67 / 1.55 |
Evaporative Heating Surface (sq ft / m2) | 1072 / 99.63 | 1105 / 102.66 |
Superheating Surface (sq ft / m2) | ||
Combined Heating Surface (sq ft / m2) | 1072 / 99.63 | 1105 / 102.66 |
Evaporative Heating Surface/Cylinder Volume | 160.45 | 144.30 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 2600 | 2667 |
Same as above plus superheater percentage | 2600 | 2667 |
Same as above but substitute firebox area for grate area | 16,096 | 16,360 |
Power L1 | 4149 | 3715 |
Power MT | 260.92 | 217.64 |