Data from NP 1 1929 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange and DeGolyer, Vol 5, p. 274. Works number was 2537 in August 1871.
This little shop switcher was delivered as an 0-4-0 trailing a tender that held 1,000 US gallons (3,785 litres) of water. Its boiler contained 87 tubes.
Although the engine was taken into the Northern Pacific when it absorbed the M&D in 1881, it wasn't until 1906 that it was converted into a saddle tank. Its diagram reports that the total heating surface area was at that time 700 sq ft (65.03 sq m), but given the tube length and count, that would required a very unlikely 243 sq ft (22.5 sq m) of firebox.
The 1929 diagram shows a long-wheelbase engine with a slender boiler top by a very tall cylindrical dome just ahead of the cab. The large saddle tank obscured a thimble-shaped sand dome.
The 11 remained in service until 1929.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | 3/H-1 |
Locobase ID | 15818 |
Railroad | Minneapolis & Duluth (NP) |
Country | USA |
Whyte | 0-4-0ST |
Number in Class | 1 |
Road Numbers | 3/69/1070/11 |
Gauge | Std |
Number Built | |
Builder | NP |
Year | 1906 |
Valve Gear | Stephenson |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 7 / 2.13 |
Engine Wheelbase (ft / m) | 7 / 2.13 |
Ratio of driving wheelbase to overall engine wheelbase | 1 |
Overall Wheelbase (engine & tender) (ft / m) | 7 / 2.13 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 39,400 / 17,872 |
Weight on Drivers (lbs / kg) | 65,200 / 29,574 |
Engine Weight (lbs / kg) | 65,200 / 29,574 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | |
Tender Water Capacity (gals / ML) | 850 / 3.22 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.75 / 2 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 54 / 27 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 47.50 / 1207 |
Boiler Pressure (psi / kPa) | 120 / 830 |
High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 22" / 356x559 |
Tractive Effort (lbs / kg) | 9259 / 4199.82 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 7.04 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 84 - 2" / 51 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 10.40 / 3.17 |
Firebox Area (sq ft / m2) | |
Grate Area (sq ft / m2) | 9.50 / 0.88 |
Evaporative Heating Surface (sq ft / m2) | |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | |
Evaporative Heating Surface/Cylinder Volume | |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 1140 |
Same as above plus superheater percentage | 1140 |
Same as above but substitute firebox area for grate area | |
Power L1 | |
Power MT |