The reference for locomotives and railcars


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Maine Central classes C-3 and C-3B
United States | 1917 | 5 produced
No. 466 in 1936 at Livermore Falls, Maine
No. 466 in 1936 at Livermore Falls, Maine
E. Milo Turner / collection Taylor Rush

After the C, C-1 and C-2 class Pacifics, the Maine Central ordered the C-3 class machines. Three locomotives were delivered in 1917 and two more C-3Bs in 1924. Compared to their predecessors, they had larger cylinders and lower boiler pressure. To increase the traction they had a booster on the trailing axle. Usually they pulled express trains with ten to twelve cars.

They were rebuilt in 1933 and 1934 and received smaller cylinders which were compensated for by higher boiler pressure. They also received a new boiler, which showed changes especially in the area of ​​the firebox. Number 470 still exists today, owned by the New England Steam Corporation, which is having it restored in Ellsworth, Maine. It is scheduled to be completed in 2024.

Variantas builtrebuilt
Built1917, 19241933-1934
Axle config4-6-2 (Pacific) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Wheelbase33 ft 8 in
Fixed wheelbase13 ft
Total wheelbase68 ft 6 in
Service weight268,300 lbs280,600 lbs
Adhesive weight159,900 lbs177,200 lbs
Total weight425,300 lbs471,400 lbs
Axle load53,300 lbs53,535 lbs
Water capacity8,000 us gal9,200 us gal
Fuel capacity28,000 lbs (coal)26,000 lbs (coal)
Power sourcesteam
Estimated power2,200 hp (1,641 kW)2,350 hp (1,752 kW)
Optimal speed37 mph41 mph
Starting effort37,697 lbf36,619 lbf
Power Plant
Driver diameter73 in
Boiler pressure185 psi195 psi
Expansion typesimple
Cylinderstwo, 25 x 28 intwo, 24 x 28 in
Grate area56.5 sq ft
Firebox area273 sq ft311.7 sq ft
Tube heating area2,700 sq ft2,721.3 sq ft
Evaporative heating area2,973 sq ft3,033 sq ft
Superheater area636 sq ft
Total heating area3,609 sq ft3,669 sq ft
Calculated Values
steam locomotive
last changed: 04/2023

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