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Pennsylvania class B6
United States | 1902 | 372 produced
B6sb No. 1670 at the Railroad Museum of Pennsylvania, Strasburg
B6sb No. 1670 at the Railroad Museum of Pennsylvania, Strasburg
James St. John / Pennsylvania Railroad # 1670 steam locomotive (0-6-0) 1
No. 4148 between two sisters probably in Alton, Illinois
No. 4148 between two sisters probably in Alton, Illinois
collection Taylor Rush
VariantB6B6aB6saB6sb
General
Built1902-1920
ManufacturerAltoona, Baldwin, Lima
Axle config0-6-0 (Six-coupled) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Wheelbase11 ft 6 in
Fixed wheelbase11 ft 6 in
Service weight170,000 lbs174,000 lbs180,000 lbs
Adhesive weight170,000 lbs174,000 lbs180,000 lbs
Axle load56,667 lbs58,000 lbs60,000 lbs
Fuel capacitycoal
Power
Power sourcesteam
Estimated power900 hp (671 kW)1,200 hp (895 kW)1,400 hp (1,044 kW)1,300 hp (969 kW)
Optimal speed16 mph21 mph25 mph23 mph
Starting effort36,144 lbf
Power Plant
Driver diameter56 in
Boiler pressure205 psi
Expansion typesimple
Cylinderstwo, 22 x 24 in
Boiler
Grate area41 sq ft62 sq ft
Evaporative heating area2,495 sq ft2,493 sq ft1,883 sq ft1,910 sq ft
Superheater area678 sq ft354 sq ft
Total heating area2,495 sq ft2,493 sq ft2,561 sq ft2,264 sq ft
Calculated Values
steam locomotive
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last changed: 12 2023
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