unk 4-4-0 "American" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class unknown (Locobase 8936)

Data from Arthur Mellen Wellington, The Economic Theory of the Location of Railways: An Analysis of the Location of Railways (New York: Chapman & Hall, limited, 1887), 407.

Wellington used this locomotive and another Mason from 1884 in a table of typical North American "American" engines. He gave no particulars about the railroad it served.


Class unknown (Locobase 8937)

Data from Arthur Mellen Wellington, The Economic Theory of the Location of Railways: An Analysis of the Location of Railways (New York: Chapman & Hall, Ltd, 1887), 407. See also See also T Everett Austin, "Fast Passenger Locomotives," delivered 2 May 1885 to the Engineer's Club of Philadelphia, Proceedings, Volume 5, No 2 (August 1885), p. 100.

Wellington used this locomotive and another Mason from 1873 (Locobase 8936) in a table of typical North American "American" engines. He gave no particulars about the railroad it served. Austin comments: "In these engines care has been taken to increase the size of all wearing parts, new cylinders and all other working parts being carefully gone over, and we may expect from these engines as good performances as are possible to be got out of the standard American type."

Specifications by Steve Llanso of Sweat House Media
Classunknownunknown
Locobase ID8936 8937
Railroadunkunk
CountryUSAUSA
Whyte4-4-04-4-0
Number in Class
Road Numbers
GaugeStdStd
Number Built
BuilderWilliam MasonWilliam Mason
Year18731884
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)89
Engine Wheelbase (ft)2223.33
Ratio of driving wheelbase to overall engine wheebase 0.36 0.39
Overall Wheelbase (engine & tender) (ft)
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)40,00068,000
Engine Weight (lbs)62,000102,000
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)
Tender Water Capacity (gals)27004300
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)3357
Geometry Relating to Tractive Effort
Driver Diameter (in)6668.50
Boiler Pressure (psi)120120
High Pressure Cylinders (dia x stroke) (in)17" x 24"18" x 24"
Tractive Effort (lbs)10,71911,579
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.73 5.87
Heating Ability
Firebox Area (sq ft)105145
Grate Area (sq ft)16.3818.90
Evaporative Heating Surface (sq ft)10111375
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)10111375
Evaporative Heating Surface/Cylinder Volume160.35194.52
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation19662268
Same as above plus superheater percentage19662268
Same as above but substitute firebox area for grate area12,60017,400
Power L132164070
Power MT354.50263.91


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