Unspecified 4-2-0 "Jervis" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class unknown (Locobase 1027)

Based on a description published by Paul R Hodge (who may have designed it) in 1840. He claimed that the engine had pulled a 220-ton load at 14 miles up a slope. See White (1968), 280-286.

Specifications by Steve Llanso of Sweat House Media
Classunknown
Locobase ID1027
Railroad
CountryUSA
Whyte4-2-0
Number in Class
Road Numbers
GaugeStd
Number Built
BuilderHR Dunham & Co.
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)
Engine Weight (lbs / kg)
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)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)54 / 1372
Boiler Pressure (psi / kPa)50 / 3.40
High Pressure Cylinders (dia x stroke) (in / mm)10.5" x 16" / 267x406
Tractive Effort (lbs / kg)1388 / 629.59
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)9 / 0.84
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 Computation450
Same as above plus superheater percentage450
Same as above but substitute firebox area for grate area
Power L1
Power MT