North Pacific Coast 4-4-0 "American" Locomotives of 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 Raildata collection 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.

Specifications 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 Wheelbase7'
Engine Wheelbase18.42'
Ratio of driving wheelbase to overall engine wheebase 0.38
Overall Wheelbase (engine & tender)40.83'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers48000 lbs
Engine Weight68000 lbs
Tender Light Weight64000 lbs
Total Engine and Tender Weight132000 lbs
Tender Water Capacity2200 gals
Tender Fuel Capacity (oil/coal)6 tons
Minimum weight of rail (calculated)40 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter48"
Boiler Pressure165 psi
Cylinders (dia x stroke)15" x 20"
Tractive Effort13148 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.65
Heating Ability
Firebox Area83 sq. ft
Grate Area13.60 sq. ft
Evaporative Heating Surface855 sq. ft
Superheating Surface
Combined Heating Surface855 sq. ft
Evaporative Heating Surface/Cylinder Volume209.02
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 area13695
Power L14098
Power MT376.44

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