Virginia & Truckee 2-4-0 "Porter" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class JW Bowker/Mexico (Locobase 4952)

Data and information from, which notes that the Bowker is preserved at the California State Railroad Museum See also Baldwin Locomotive Works Specification for Engines, as digitized by the DeGolyer Library of Southern Methodist University, Volume 7 p. 141. Baldwin works number was 3689 in February 1875.

This engine disposed an unusual wheel arrangement for a North American locomotive and was a good deal smaller than the other V&T locomotives. It was renamed Mexico in 1876.

In 1896, the V&T sold the 21 to Sierra Nevada Wood & Lumber Co as their #3. More than two decades later in 1917, the SNW&LC change its name to Hobart Estate. By then the Nevada company had laid out 38 miles (61.2 km) of standard and 3-foot gauge using 40-lb/yard (20-kg/metre) and 60 lb/yard (30 kg/metre) and up to 3% grades.

The 3 operated on the Hobart Southern remnant in 1936 but in June 1937, it was donated to the Railway & Locomotive Historical Society. Almost 40 years later, the 3 was transported to the then-new California State Railroad Museum at Sacramento.

Principal Dimensions by Steve Llanso of Sweat House Media
ClassJW Bowker/Mexico
Locobase ID4952
RailroadVirginia & Truckee
Number in Class1
Road Numbers21
Number Built1
BuilderBurnham, Parry, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 6.50 / 1.98
Engine Wheelbase (ft / m)13.71 / 4.18
Ratio of driving wheelbase to overall engine wheebase 0.47
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)48,000 / 21,772
Engine Weight (lbs / kg)65,000 / 29,484
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)1200 / 4.55
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)40 / 20
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)48.25 / 1227
Boiler Pressure (psi / kPa)130 / 9
High Pressure Cylinders (dia x stroke) (in / mm)14" x 22" / 356x559
Tractive Effort (lbs / kg)9875 / 4479.23
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.86
Heating Ability
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)14.30 / 1.33
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 Computation1859
Same as above plus superheater percentage1859
Same as above but substitute firebox area for grate area
Power L1
Power MT

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