Although laid out along Stephenson multi-tube boiler lines, Railroad Gazette of 12 April 1901 comments that " the design was inferior to even earlier engines by Stephenson and Bury." The locomotive showed the D-shaped Bury firebox behind the single driving axle and inside cylinders driving the rear axle. The attribution to the Petersburg (later part of the RF&P) as owning railroad constitutes a bit of deductive reasoning by Herbert T. Walker, author of the RG article.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Pioneer |
| Locobase ID | 4089 |
| Railroad | Petersburg |
| Country | USA |
| Whyte | 2-2-0 |
| Number in Class | 1 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 1 |
| Builder | Rothwell, Hick & Rothwell |
| Year | 1832 |
| 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) | 54 / 1372 |
| Boiler Pressure (psi / kPa) | 40 / 280 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 9" x 18" / 229x457 |
| Tractive Effort (lbs / kg) | 918 / 416.40 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 50 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 6.33 / 1.93 |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | |
| Evaporative Heating Surface (sq ft / m2) | 150 / 13.94 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 150 / 13.94 |
| Evaporative Heating Surface/Cylinder Volume | 112.78 |
| 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 | |