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.
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.
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|
|Railroad||Carolina, Clinchfield & Ohio (Clinchfield)||Carolina, Clinchfield & Ohio (Clinchfield)||Carolina, Clinchfield & Ohio (Clinchfield)|
|Number in Class||7||10||10|
|Locomotive Length and Weight|
|Ratio of driving wheelbase to overall engine wheebase||0.32||0.27||0.27|
|Overall Wheelbase (engine & tender)||95.92'||93.25'||93.25'|
|Axle Loading (Maximum Weight per Axle)||60000 lbs||60700 lbs||62000 lbs|
|Weight on Drivers||467000 lbs||478000 lbs||486500 lbs|
|Engine Weight||523600 lbs||531000 lbs||541000 lbs|
|Tender Light Weight||314000 lbs||214000 lbs||209000 lbs|
|Total Engine and Tender Weight||837600 lbs||745000 lbs||750000 lbs|
|Tender Water Capacity||12000 gals||12000 gals||12000 gals|
|Tender Fuel Capacity (oil/coal)||23 tons||16 tons||16 tons|
|Minimum weight of rail (calculated)||97 lb/yard||100 lb/yard||101 lb/yard|
|Geometry Relating to Tractive Effort|
|Boiler Pressure||200 psi||240 psi||240 psi|
|High Pressure Cylinders (dia x stroke)||28" x 32"||25" x 32"||25" x 32"|
|Low Pressure Cylinders (dia x stroke)||42" x 32" (2)||39" x 32" (2)||39" x 32" (2)|
|Tractive Effort||103602 lbs||101465 lbs||101465 lbs|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.51||4.71||4.79|
|Firebox Area||438 sq. ft||435 sq. ft||435 sq. ft|
|Grate Area||96.20 sq. ft||96 sq. ft||96 sq. ft|
|Evaporative Heating Surface||6123 sq. ft||6120 sq. ft||6120 sq. ft|
|Superheating Surface||1595 sq. ft||1475 sq. ft||1475 sq. ft|
|Combined Heating Surface||7718 sq. ft||7595 sq. ft||7595 sq. ft|
|Evaporative Heating Surface/Cylinder Volume||268.49||336.62||336.62|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||19240||23040||23040|
|Same as above plus superheater percentage||23280||27418||27418|
|Same as above but substitute firebox area for grate area||105996||124236||124236|