Denver, Northwestern & Pacific 4-6-0 "Ten-Wheeler" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 34 (Locobase 11472)

Data from "Locomotive Building," The Railway Age Gazette, Vol XLVIII, No 13 (1 April 1910), p. 923.

This Ten-wheeler was the one mixed-traffic Ten-wheeler on the DNW & P with Walschaert outside radial valve gear. Equipment suppliers included:

Axles Otis Steel

Bell ringer Trojan

Boiler lagging Sectional magnesia

Brakes Westinghouse

Brake-beams 'Creco"

Brick arch American Locomotive Equipment Co.

Couplers Sharon

Fire doors Franklin

Headlight Pyle-National

Injector Nathan Mfg. Co.

Journal bearings More Jones Co.

Piston and valve rod packing Paxton-Mltchell

Safety valve Ashton

Sanding devices Leach

Sight-feed lubricators Nathan Mfg. Co.

Springs Uallway Steel-Spring Co.

Steam gages Ashton

Steam heat equipment Safety Car Heating & Ltg. Co.

Tires Latrobe

Tubes Worth Bros.

It operated on the railroad (renamed Denver & Salt Lake) until 1948.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID11,472
RailroadDenver, Northwestern & Pacific (D&SL)
Number in Class1
Road Numbers303 / 796
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheebase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)149,000 / 67,585
Engine Weight (lbs / kg)200,000 / 90,719
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)7000 / 26.52
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)10 / 9.10
Minimum weight of rail (calculated) (lb/yd / kg/m)83 / 41.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)63 / 1600
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)20.5" x 28" / 521x711
Tractive Effort (lbs / kg)31,752 / 14402.48
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.69
Heating Ability
Firebox Area (sq ft / m2)199 / 18.49
Grate Area (sq ft / m2)52.60 / 4.89
Evaporative Heating Surface (sq ft / m2)3253 / 302.32
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)3253 / 302.32
Evaporative Heating Surface/Cylinder Volume304.12
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation10,520
Same as above plus superheater percentage10,520
Same as above but substitute firebox area for grate area39,800
Power L18340
Power MT370.20

All material Copyright ©
Wes Barris