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Carolina, Clinchfield & Ohio class L-3
US Railroad Administration Heavy Mallet (copy)
United States | 1923
10 produced
collection Taylor Rush

When the Clinchfield needed more 2-8-8-2 Mallets in 1923, they had two earlier classes to take as a basis: either the L-1 built by Baldwin in 1919 after their own design or the USRA standard design built by Baldwin in the same year that was called class L-2. They decided to order ten nearly exact USRA copies, which were now built by ALCO-Brooks and designated class L-3. They were used to haul heavy coal trains over the Appalachian mountains. One suffered a boiler explosion in 1948 and was scrapped. While the L-1 was retired by 1950, the L-3 and their L-2 sisters were only retired between 1950 and 1952.

General
Built1923
ManufacturerALCO
Axle config2-8-8-2 (Mikado Mallet) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Wheelbase58 ft
Rigid wheelbase15 ft 9 in
Total wheelbase94 ft 6 in
Service weight541,000 lbs
Adhesive weight486,500 lbs
Total weight750,000 lbs
Axle load62,000 lbs
Water capacity12,000 us gal
Fuel capacity32,000 lbs (coal)
Boiler
Grate area96 sq ft
Firebox area435 sq ft
Tube heating area5,685 sq ft
Evaporative heating area6,120 sq ft
Superheater area1,475 sq ft
Total heating area7,595 sq ft
Power Plant
Driver diameter57 in
Boiler pressure240 psi
Expansion typecompound
Cylindersfour, HP: 25 x 32 in
and LP: 39 x 32 in
Power
Power sourcesteam
Estimated power4,300 hp (3,207 kW)
Optimal speed27 mph
Starting effort101,465 lbf
with start valve121,758 lbf
Calculated Values
steam locomotive
freight
Mallet
last changed: 10/2024
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