Lehigh Valley 4-8-0 "Mastodon" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 565/O-2 (Locobase 15805)

Data from DeGolyer, Vol 16, p. 230.Works numbers were 11681-11682, 11688-11690, 11694, 11697, 11700-11701, 11705 in March 1891.

The Lehigh Valley liked Baldwin's Twelve-wheeler design enough to ask for another ten three years after the delivery of the first fifteen (Locobase 6558). Compared to the earlier engines, these had bigger boilers and a deeper grate.

All served the Lehigh Valley throughout their careers. The 571 was scrapped soon after the turn of the century and before it could be renumbered like the others. The other nine were renumbered in a sequence corresponding to the out-of-order numbering of the original, in which 568 came before 566-567.

All were scrapped in the 'teens.

Class Champion (Locobase 2847)

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), 410. Also see "Twelve-Wheeled Freight Locomotive for the Lehigh Valley", Scientific American Supplement No 347 (26 August 1882), pp. 5532-5533. Alexander, Iron Horse, pl 77

The first of the Twelve-Wheelers, this engine was built at the Weatherly Shops to a design by Philip Hofecker, master mechanic. Compared to all of the standard-gauge 4-8-0s that would follow, this was a small locomotive with short tubes, but a relatively large grate for burning anthracite coal.

Class O-1 (Locobase 6558)

Data from 1921 Georgia, Florida & Alabama locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Vol 13, p. 230 and Vol 14, p. 103.Works numbers were 8351, 8361-8362 in January 1887; 8365-8366, 8369 in February 1887; 8378, 8384, 8396, 8398, 9036-9038 in March;, 9040-9041 in February 1888. The Lehigh Valley's Sayre shops added 221 and 298 in February and September 1887, respectively.

Fourteen of the fifteen engines in this class served their entire careers on the LV. One, LV #297, then was renumbered #58. In November 1908, the LV sold the 58 to locomotive rebuilder/recycler Georgia Car & Locomotive Company as their #56. At this time the locomotive was rebuilt as a 2-8-0.

In February 1912, the Georgia, Florida & Alabama procured the engine as #203, then renumbered it #199. It's possible that by this time it had been restored to its 4-8-0 status, since the 1921 diagram clearly shows it on twelve wheels. Within a year, the GF & A had retired 199 and it was scrapped.

Donald Hensley, Jr's excellent TAP lines page ("The Home Page for Southeastern Short line, Narrow Gauge and Industrial Railroad History and Photographs") http://www.taplines.net/gfa/gfaroster (viewed 31 May 2005) shows the full history of its 199.

Specifications by Steve Llanso of Sweat House Media
Locobase ID15,805 2847 6558
RailroadLehigh Valley (LV)Lehigh Valley (LV)Lehigh Valley (LV)
Number in Class10115
Road Numbers565, 568, 566-567, 569-574/70-7820288-297, 601-605/50-64
Number Built10115
BuilderBurnham, Parry, Williams & CoLVBurnham, Parry, Williams & Co
Valve GearStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)13.5013.0313.50
Engine Wheelbase (ft)23.3723.1723.37
Ratio of driving wheelbase to overall engine wheebase 0.58 0.56 0.58
Overall Wheelbase (engine & tender) (ft)46.75
Axle Loading (Maximum Weight per Axle) (lbs)24,100
Weight on Drivers (lbs)82,43287,660
Engine Weight (lbs)120,000101,696112,180
Tender Loaded Weight (lbs)60,00053,81860,000
Total Engine and Tender Weight (lbs)180,000155,514172,180
Tender Water Capacity (gals)300025753000
Tender Fuel Capacity (oil/coal) (gals/tons) 4.50
Minimum weight of rail (calculated) (lb/yd)3437
Geometry Relating to Tractive Effort
Driver Diameter (in)50.184850
Boiler Pressure (psi)140125130
High Pressure Cylinders (dia x stroke) (in)20" x 24"20" x 26"20" x 24"
Tractive Effort (lbs)22,76623,02121,216
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.58 4.13
Heating Ability
Firebox Area (sq ft)179.28179153
Grate Area (sq ft)38.573238.57
Evaporative Heating Surface (sq ft)177311741478
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)177311741478
Evaporative Heating Surface/Cylinder Volume203.17124.18169.37
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation540040005014
Same as above plus superheater percentage540040005014
Same as above but substitute firebox area for grate area25,09922,37519,890
Power L1358221892784
Power MT234.18280.07


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