North Pacific Coast 4-4-0 "American" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 16 (Locobase 2147)

Data from Catalogue Descriptive of Simple and Compound Locomotives built by Brooks Locomotive Works, Dunkirk, NY (Buffalo, NY: Matthew-Northrup Company, 1899). See also NWP 10 - 1950 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange and the excellent roster on [], access 9 February 2007.

Builder info from B.Rumary, 25 Kingscombe, Gurney Slade, Radstock, BA3 4TH, ENGLAND and Jeremy Lambert as supplied by Allen Stanley in March 2004. Works number was 2421 in March 1894.

The railroad name changed to North Shore, then Northwestern Pacific, but the number always remained 16.

Apparently based on the design shown in Locobase 8167, this engine had a quite-different firebox and tube arrangement. In addition to disposing nine fewer tubes, the locomotive apparently had some arch tubes as the grate area was smaller and the firebox heating surface area was substantially larger. Narrow firebox measured 7 ft (2.134 m) long by 2 ft (0.61 m) wide. Its cab was topped by a slender box that would serve as a clerestory if it had windows.

As with the earlier engines, the 16 served the NPC, the North Shore, and the Northwestern Pacific in succession. It was sold for scrap on 17 October 1934.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID2147
RailroadNorth Pacific Coast
Number in Class1
Road Numbers16/91
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)7 / 2.13
Engine Wheelbase (ft / m)18.42 / 5.61
Ratio of driving wheelbase to overall engine wheelbase 0.38
Overall Wheelbase (engine & tender) (ft / m)40.83 / 12.44
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)48,000 / 21,772
Engine Weight (lbs / kg)68,000 / 30,844
Tender Loaded Weight (lbs / kg)64,000 / 29,030
Total Engine and Tender Weight (lbs / kg)132,000 / 59,874
Tender Water Capacity (gals / ML)2200 / 8.33
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)6 / 6
Minimum weight of rail (calculated) (lb/yd / kg/m)40 / 20
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)48 / 1219
Boiler Pressure (psi / kPa)165 / 11.40
High Pressure Cylinders (dia x stroke) (in / mm)15" x 20" / 381x508
Tractive Effort (lbs / kg)13,148 / 5963.84
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.65
Heating Ability
Tubes (number - dia) (in / mm)164 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)9 / 2.74
Firebox Area (sq ft / m2)83 / 7.71
Grate Area (sq ft / m2)13.60 / 1.26
Evaporative Heating Surface (sq ft / m2)855 / 79.46
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)855 / 79.46
Evaporative Heating Surface/Cylinder Volume209.05
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2244
Same as above plus superheater percentage2244
Same as above but substitute firebox area for grate area13,695
Power L14099
Power MT376.53

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