Thomas Iron Company 2-4-0 "Porter" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class Pawnee (Locobase 11844)

Data from Baldwin Locomotive Works Specification for Engines, 1888, as digitized by the DeGolyer Library of Southern Methodist University Vol 13, p.5.

Works number was 7864 in March 1886. See also http://www.lehighvalleymarketplace.com/departments/because-you-live-here/coplay-hokendauqua-fullerton/ for a history of the three small towns in this area.

Thomas Iron was located in Hokendauqua, Penna in the Lehigh Valley. Established in 1853, the firm produced iron in Hokendauqua until 1929. Its mile-and-a-half railroad connected with the Ironton Railroad at West Coplay. This little 4-coupled with leading truck differed from most of the earlier versions of that wheel arrangement in having a Bissel truck. It was one of the TI RR's later acquisitions.

Specifications by Steve Llanso of Sweat House Media
ClassPawnee
Locobase ID11,844
RailroadThomas Iron Company
CountryUSA
Whyte2-4-0
Number in Class1
Road Numbers17
GaugeStd
Number Built1
BuilderBurnham, Parry, Williams & Co
Year1886
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft) 4.67
Engine Wheelbase (ft)11.25
Ratio of driving wheelbase to overall engine wheebase 0.42
Overall Wheelbase (engine & tender) (ft)
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)
Engine Weight (lbs)
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)
Tender Water Capacity (gals)800
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)
Geometry Relating to Tractive Effort
Driver Diameter (in)56
Boiler Pressure (psi)130
High Pressure Cylinders (dia x stroke) (in)11" x 16"
Tractive Effort (lbs)3820
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Firebox Area (sq ft)35.84
Grate Area (sq ft)10.80
Evaporative Heating Surface (sq ft)319
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)319
Evaporative Heating Surface/Cylinder Volume181.26
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1404
Same as above plus superheater percentage1404
Same as above but substitute firebox area for grate area4659
Power L13435
Power MT


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