City Point 4-2-0 "Jervis" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class C (Locobase 4833)

Loco Profile 11 (Brian Reed, 1971) says that this type, offered as part of a standard series of four 4-2-0 types in the late 1830s was the least widely sold. Of the 4 Norris types, these were by far the least powerful and can't have been satisfactory for very long.

Specifications by Steve Llanso of Sweat House Media
ClassC
Locobase ID4833
RailroadCity Point (Virginia)
CountryUSA
Whyte4-2-0
Number in Class2
Road Numbers
GaugeStd
Number Built2
BuilderNorris
Year1837
Valve Gear
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)8022 / 3639
Engine Weight (lbs / kg)15,705 / 7124
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)13 / 6.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)48 / 1219
Boiler Pressure (psi / kPa)100 / 6.90
High Pressure Cylinders (dia x stroke) (in / mm)9" x 18" / 229x457
Tractive Effort (lbs / kg)2582 / 1171.18
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.11
Heating Ability
Firebox Area (sq ft / m2)29.29 / 2.72
Grate Area (sq ft / m2) 6.37 / 0.59
Evaporative Heating Surface (sq ft / m2)247 / 22.96
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)247 / 22.96
Evaporative Heating Surface/Cylinder Volume186.36
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation637
Same as above plus superheater percentage637
Same as above but substitute firebox area for grate area2929
Power L12375
Power MT652.70