Carolina, Clinchfield & Ohio 2-8-8-2 "Chesapeake" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class L-1 (Locobase 1318)

Data from 1948 Clinchfield locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Volume 56, p. 459+. (Thanks to Chris Hohl for his 28 March 2016 email noting the "as-built" tender capacities and weights.) Works numbers were 51477, 51558 in March 1919; 51679 in April; 51768 in May; 51868, 51906, 51976 in June.

Had slightly more tractive effort than the L-2s, which were USRA designs; the L-1s were ordered on 31 March 1917, but were put in production two years later. The class was delivered with a tender weighing 180,000 lb (81,647 kg) that held 10,000 US gallons (37,850 litres) of water and 15 tons (13.6 tonnes) of coal.

Included in the direct heating surface area was the 132 sq ft (12.25 sq m) of combustion chamber and the 45 sq ft (4.2 sq m) of the five arch tubes. Even with a 5 1/2-foot long combustion chamber, the boiler still contained 24-foot long tubes and flues. Even so, the L-1 had to be a slow-speed engine because its boiler needed to fill its large HP cylinder volume.

One unusual feature was the different diameters of piston valves for the two different cylinder volumes served. HP cylinders had 15" (381 mm) piston valves while the LPs used 17" (432 mm) piston valves.

Operated until 1948-1950.


Class L-2 (Locobase 1320)

Data from Clinch 1943ca Locomotive Diagram supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 52285-52286, 52327-52329, 52348-52349, 52370, 52395 in September 1919; 52450 in November.

Standard USRA design based on N&W Y-2 Mallet compound locomotive and delivered to the Clinchfield in 1919. Unlike the light articulateds, the "heavy" was considered a great success. These had 14" (356 mm) piston valves on all cylinders.

Ten more entered service in 1923 as L-3 (Locobase 1321). This class operated until 1950-1952.


Class L-3 (Locobase 1321)

Data from Clinch 1943ca Locomotive Diagram supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

Follow-ups to the earlier 10 built to the USRA heavy articulated design (Locobase 1320). These were essentially similar, but came from Brooks rather than Baldwin. Operated until 1951-1952.

Specifications by Steve Llanso of Sweat House Media
ClassL-1L-2L-3
Locobase ID1318 1320 1321
RailroadCarolina, Clinchfield & Ohio (Clinchfield)Carolina, Clinchfield & Ohio (Clinchfield)Carolina, Clinchfield & Ohio (Clinchfield)
CountryUSAUSAUSA
Whyte2-8-8-22-8-8-22-8-8-2
Number in Class71010
Road Numbers700-706725-734735-744
GaugeStdStdStd
Number Built71010
BuilderBaldwinBaldwinBrooks
Year191919191923
Valve GearBakerBakerWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft)18.5015.5015.50
Engine Wheelbase (ft)57.3357.3357.33
Ratio of driving wheelbase to overall engine wheebase 0.32 0.27 0.27
Overall Wheelbase (engine & tender) (ft)95.9293.2593.25
Axle Loading (Maximum Weight per Axle) (lbs)60,00060,70062,000
Weight on Drivers (lbs)467,000478,000486,500
Engine Weight (lbs)523,600531,000541,000
Tender Loaded Weight (lbs)314,000214,000209,000
Total Engine and Tender Weight (lbs)837,600745,000750,000
Tender Water Capacity (gals)12,00012,00012,000
Tender Fuel Capacity (oil/coal) (gals/tons)231616
Minimum weight of rail (calculated) (lb/yd)97100101
Geometry Relating to Tractive Effort
Driver Diameter (in)575757
Boiler Pressure (psi)200240240
High Pressure Cylinders (dia x stroke) (in)28" x 32"25" x 32"25" x 32"
Low Pressure Cylinders (dia x stroke) (in)42" x 32"39" x 32"39" x 32"
Tractive Effort (lbs)103,602101,465101,465
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.51 4.71 4.79
Heating Ability
Firebox Area (sq ft)438435435
Grate Area (sq ft)96.209696
Evaporative Heating Surface (sq ft)612361206120
Superheating Surface (sq ft)159514751475
Combined Heating Surface (sq ft)771875957595
Evaporative Heating Surface/Cylinder Volume268.49336.62336.62
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation19,24023,04023,040
Same as above plus superheater percentage23,28027,41827,418
Same as above but substitute firebox area for grate area105,996124,236124,236
Power L1839311,11611,116
Power MT316.97410.15402.99


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