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Boston & Maine class R-1
United States | 1935 | 18 produced
No. 4117 "Hercules" in a works photo
No. 4117 "Hercules" in a works photo
Ron Ziel, „American Locomotives 1858 to 1949”
General
Built1935
ManufacturerBaldwin
Axle config4-8-2 (Mountain) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Wheelbase44 ft 2 in
Fixed wheelbase19 ft 3 in
Service weight416,100 lbs
Adhesive weight269,400 lbs
Total weight788,800 lbs
Axle load68,900 lbs
Water capacity20,200 us gal
Fuel capacity45,000 lbs (coal)
Power
Power sourcesteam
Estimated power4,500 hp (3,356 kW)
Optimal speed42 mph
Starting effort67,918 lbf
Power Plant
Driver diameter73 in
Boiler pressure240 psi
Expansion typesimple
Cylinderstwo, 28 x 31 in
Boiler
Grate area79 sq ft
Firebox area475 sq ft
Tube heating area4,036 sq ft
Evaporative heating area4,511 sq ft
Superheater area1,924 sq ft
Total heating area6,435 sq ft
Calculated Values
steam locomotive
passenger
express
last changed: 08 2023
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