Stephenson's patent covered the addition of a trailing axle to carry a larger boiler and the elimination of the flange on the driving axle. These Patentees were widely distributed and came into their own as successful passenger engines. See the first German locomotive (the ADLER) and the first Belgian-built locomotive (LE BELGE), which was delivered in 1835 by Cockerill.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Patentee |
| Locobase ID | 666 |
| Railroad | several |
| Country | Great Britain |
| Whyte | 2-2-2 |
| Number in Class | |
| Road Numbers | |
| Gauge | Std |
| Number Built | |
| Builder | Robert Stephenson & Co |
| Year | 1837 |
| 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) | 9637 / 4371 |
| Engine Weight (lbs / kg) | 22,644 / 10,271 |
| 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) | 16 / 8 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 66 / 1676 |
| Boiler Pressure (psi / kPa) | |
| High Pressure Cylinders (dia x stroke) (in / mm) | 11" x 18" / 279x457 |
| Tractive Effort (lbs / kg) | |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 55.98 / 5.20 |
| Grate Area (sq ft / m2) | 9.90 / 0.92 |
| Evaporative Heating Surface (sq ft / m2) | 482 / 44.80 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 482 / 44.80 |
| Evaporative Heating Surface/Cylinder Volume | 243.45 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | |
| Same as above plus superheater percentage | |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |