United States Navy Yard - Puget Sound 0-4-0 "Switcher" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class Olympic (Locobase 12944)

Data from "Lima Switcher," Railway and Locomotive Engineering, Volume 18, No 6 (June 1905), p. 272. Works number was 1011 in April 1905.

Locobase has logged an agenda item to include North American switchers in the holding at some later date. But this little saddle tank turned up in another search, so the compiler put it in.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID12,944
RailroadUnited States Navy Yard - Puget Sound
Number in Class1
Road Numbers
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)6 / 1.83
Engine Wheelbase (ft / m)6 / 1.83
Ratio of driving wheelbase to overall engine wheebase1
Overall Wheelbase (engine & tender) (ft / m)6 / 1.83
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)50,000 / 22,680
Engine Weight (lbs / kg)50,000 / 22,680
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)50,000
Tender Water Capacity (gals / ML)700 / 2.65
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT) 0.50 / 0.50
Minimum weight of rail (calculated) (lb/yd / kg/m)42 / 21
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)36 / 914
Boiler Pressure (psi / kPa)150 / 10.30
High Pressure Cylinders (dia x stroke) (in / mm)12" x 16" / 305x406
Tractive Effort (lbs / kg)8160 / 3701.32
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.13
Heating Ability
Firebox Area (sq ft / m2)54.60 / 5.07
Grate Area (sq ft / m2)10.40 / 0.97
Evaporative Heating Surface (sq ft / m2)487 / 45.26
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)487 / 45.26
Evaporative Heating Surface/Cylinder Volume232.53
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1560
Same as above plus superheater percentage1560
Same as above but substitute firebox area for grate area8190
Power L13266
Power MT288.01

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