Data from "Borsig's Express Locomotive," Van Norstrand's Eclectic Engineering Magazine, Volume 1 (1869), pp. 665-666.
This set of locomotives was considered an express-engine design and was sufficiently successful to merit a second order of one dozen in December 1868. The author of the item noted that the drivers were equalized while the leading axle had a transverse compensating beam linking the front-spring ends of the springs. This achieved the desired three-point suspension.
In addition to a raised boiler over the firebox for more steaming space as well as increasing weight on the trailing coupled axle, the class sported a dome just behind the stack.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 9950 |
| Railroad | Rhenish |
| Country | Germany |
| Whyte | 2-4-0 |
| Number in Class | 22 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 22 |
| Builder | Borsig |
| Year | 1867 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 8.17 / 2.50 |
| Engine Wheelbase (ft / m) | 13.50 / 4.10 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.61 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 26,208 / 11,888 |
| Weight on Drivers (lbs / kg) | 51,520 / 23,369 |
| Engine Weight (lbs / kg) | 75,488 / 34,241 |
| 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) | 43 / 21.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 66 / 1675 |
| Boiler Pressure (psi / kPa) | 130.50 / 900 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 22" / 405x560 |
| Tractive Effort (lbs / kg) | 9466 / 4293.71 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.44 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 171 - 1.88" / 48 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11.12 / 3.39 |
| Firebox Area (sq ft / m2) | 69 / 6.41 |
| Grate Area (sq ft / m2) | |
| Evaporative Heating Surface (sq ft / m2) | 999 / 92.84 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 999 / 92.84 |
| Evaporative Heating Surface/Cylinder Volume | 195.13 |
| 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 | 9005 |
| Power L1 | 3768 |
| Power MT | 322.48 |