Data from Railroad & Engineering Journal, Vol LXI (Vol 1, new series), (October 1887), p. 453. Works number was 2817.
Forney identified this little engine as "The Smallest Locomotive" and it came very close. Its appearance suggested that BP simply lopped off both ends of a standard boiler barrel, then put smaller-diameter tubes in it. It was used to move cars around the builder's plant. See Locobase 9959 for 3 locomotives that went to the Lancashire & Yorkshire at the same time as this was delivered for the Manchester Jubilee celebration.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Dot |
| Locobase ID | 10795 |
| Railroad | Beyer, Peacock |
| Country | Great Britain |
| Whyte | 0-4-0T |
| Number in Class | 1 |
| Road Numbers | |
| Gauge | 18 in |
| Number Built | 1 |
| Builder | Beyer, Peacock |
| Year | 1887 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 2.75 / 0.84 |
| Engine Wheelbase (ft / m) | 2.75 / 0.84 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 2.75 / 0.84 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 7280 / 3302 |
| Engine Weight (lbs / kg) | 7280 / 3302 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 30 / 0.11 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 6 / 3 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 16.80 / 427 |
| Boiler Pressure (psi / kPa) | 170 / 1170 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 5" x 6" / 127x152 |
| Tractive Effort (lbs / kg) | 1290 / 585.13 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.64 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 55 - 1.375" / 35 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 2 / 0.61 |
| Firebox Area (sq ft / m2) | 10.90 / 1.01 |
| Grate Area (sq ft / m2) | 1.80 / 0.17 |
| Evaporative Heating Surface (sq ft / m2) | 50 / 4.65 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 50 / 4.65 |
| Evaporative Heating Surface/Cylinder Volume | 366.69 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 306 |
| Same as above plus superheater percentage | 306 |
| Same as above but substitute firebox area for grate area | 1853 |
| Power L1 | 3648 |
| Power MT | 2209.47 |