Data from James Dredge (ed.), "Section V Historical Locomotives and Rolling Stock -- No 104, 'The Atlas'", in A Record of the Transportation Exhibits at the World's Columbian Exposition (New York: John Wiley & Sons, 1894), p. 344. Works number was 58 in 1834.
Dredge reported that when this locomotive, the first six-coupled Stephenson engine, was delivered in February 1834 it was "the largest, heaviest, and most powerful locomotive running." Low cylinders drove wheels that had the cranks mounted outside of the hubs.
Data from Arthur E Kyffin, "Some Vulcan Foundry Engines", The Railway Engineer, Volume 17, No 9 (September 1896), p. 259 and "The Vulcan, No 10" drawing archived at Vulcan Foundry website, [], last accessed 26 July 2015. Works number was 10 in
For its time, this design seems remarkably advanced. The Stephenson type boiler has a huge drum for a "dome" just behind the stack, the inside cylinders drive horizontally, and the firebox is flush with the top of the boiler.
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | Atlas | Vulcan |
Locobase ID | 20328 | 16088 |
Railroad | Leicester & Swannington | Leicester & Swannington |
Country | Great Britain | Great Britain |
Whyte | 0-6-0 | 0-6-0 |
Number in Class | 1 | |
Road Numbers | 6 | 8 |
Gauge | Std | Std |
Number Built | 1 | |
Builder | Robert Stephenson & Co | Tayleur |
Year | 1834 | 1835 |
Valve Gear | ||
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 11.61 / 3.54 | 11.67 / 3.56 |
Engine Wheelbase (ft / m) | 11.61 / 3.54 | 11.67 / 3.56 |
Ratio of driving wheelbase to overall engine wheelbase | 1 | 1 |
Overall Wheelbase (engine & tender) (ft / m) | ||
Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
Weight on Drivers (lbs / kg) | 38,080 / 17,273 | 38,080 / 17,273 |
Engine Weight (lbs / kg) | 38,080 / 17,273 | 38,080 / 17,273 |
Tender Loaded Weight (lbs / kg) | 11,200 / 5080 | |
Total Engine and Tender Weight (lbs / kg) | 49,280 / 22,353 | |
Tender Water Capacity (gals / ML) | 960 / 3.64 | 960 / 3.64 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | ||
Minimum weight of rail (calculated) (lb/yd / kg/m) | 21 / 10.50 | 21 / 10.50 |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 54 / 1372 | 54 / 1372 |
Boiler Pressure (psi / kPa) | 60 / 410 | 100 / 690 |
High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 20" / 406x508 | 16" x 20" / 406x508 |
Tractive Effort (lbs / kg) | 4836 / 2193.58 | 8059 / 3655.51 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 7.87 | 4.73 |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 154 - 1.75" / 44 | 154 - 1.75" / 44 |
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | 8.33 / 2.54 | |
Firebox Area (sq ft / m2) | 67.45 / 6.27 | 64 / 5.95 |
Grate Area (sq ft / m2) | 10.60 / 0.98 | |
Evaporative Heating Surface (sq ft / m2) | 657 / 61.04 | 625 / 58.06 |
Superheating Surface (sq ft / m2) | ||
Combined Heating Surface (sq ft / m2) | 657 / 61.04 | 625 / 58.06 |
Evaporative Heating Surface/Cylinder Volume | 141.16 | 134.29 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 1060 | |
Same as above plus superheater percentage | 1060 | |
Same as above but substitute firebox area for grate area | 4047 | 6400 |
Power L1 | 1154 | 1827 |
Power MT | 200.43 | 317.32 |