Boston & Lowell 2-2-0 "Planet" Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class Patrick (Locobase 802)
An 1899 Locomotive History reproduced on [
] gives the details (except for the boiler pressure) of this Planet type. See also Angus Sinclair, Development of the Locomotive, pp. 179-180. Railway & Locomotive Historical Society Bulletin #13 (1927) has a report by the railroad of this engine's performance.
The entry notes that the fireboxes in the class varied in depth from 3' 1 1/2" to 3' 3" deep giving heating surfaces of between 36.8 to 38.36 sq ft. The stack had two 1 1/2"-diameter blast pipes.
The other locomotives in the class were Concord, Nashua, Medford, and Suffolk. Sinclair adds that a government commission reporting on railroads in New England said that 35 of this type were then in use. Some were later rebuilt as 2-2-2s by adding a trailing axle under the firebox.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Patrick |
| Locobase ID | 802 |
| Railroad | Boston & Lowell |
| Country | USA |
| Whyte | 2-2-0 |
| Number in Class | 5 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 5 |
| Builder | Lowell Manufacturing Co. |
| Year | 1837 |
| Valve Gear | drop-hook |
| 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) | 14,448 / 6554 |
| Weight on Drivers (lbs / kg) | 14,448 / 6554 |
| Engine Weight (lbs / kg) | 23,072 / 10,465 |
| Tender Loaded Weight (lbs / kg) | 14,896 / 6757 |
| Total Engine and Tender Weight (lbs / kg) | 37,968 / 17,222 |
| Tender Water Capacity (gals / ML) | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 24 / 12 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 60 / 1524 |
| Boiler Pressure (psi / kPa) | 70 / 480 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 11" x 16" / 279x406 |
| Tractive Effort (lbs / kg) | 1920 / 870.90 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 7.53 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 66 - 2.25" / 57 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 6.83 / 2.08 |
| Firebox Area (sq ft / m2) | 38.36 / 3.57 |
| Grate Area (sq ft / m2) | 6.71 / 0.62 |
| Evaporative Heating Surface (sq ft / m2) | 304 / 28.25 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 304 / 28.25 |
| Evaporative Heating Surface/Cylinder Volume | 172.73 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 470 |
| Same as above plus superheater percentage | 470 |
| Same as above but substitute firebox area for grate area | 2685 |
| Power L1 | 1972 |
| Power MT | 300.91 |