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Pennsylvania class H6

H6sa No. 2552 in November 1931 in Logansport, Indiana

The various variants of the H6 formed the most numerous class of steam locomotives in the PRR. After the USATC S160, which had been developed for wartime use in Europe, they were also the most-built Consolidations. Th...

General

Property	Pennsylvania class H6 H6 H6 H6a H6b H6sa, sb Remove
Built	1899-1901
Manufacturers	Baldwin
Wheel arrangement	2-8-0 (Consolidation)
Gauge	1,435 mm (Standard gauge)

Dimensions and weights

Property	Pennsylvania class H6 H6 H6 H6a H6b H6sa, sb Remove
Length	20.09 m
Wheelbase	7.54 m
Rigid wheelbase	5.04 m
Service weight	81.6 t
Adhesive weight	72.6 t
Axle load	18.1 t
Total weight	132.4 t
Water capacity	22,712 l
Fuel capacity	10 t (coal)

Boiler

Property	Pennsylvania class H6 H6 H6 H6a H6b H6sa, sb Remove
Grate area	3.096 m²
Firebox surface	16.723 m²
Tube heating surface	244.614 m²
Evaporative heating surface	261.337 m²
Total heating surface	261.3 m²

Power plant

Property	Pennsylvania class H6 H6 H6 H6a H6b H6sa, sb Remove
Driver diameter	1,422 mm
Boiler pressure	12.8 bar
Expansion type	simple expansion
Cylinders	two, 559 x 711 mm

Power

Property	Pennsylvania class H6 H6 H6 H6a H6b H6sa, sb Remove
Power source	steam
Estimated power	820 kW (1,115 PS)
Top speed	80 km/h
Starting effort	169.3 kN

Calculated values

Property	Pennsylvania class H6 H6 H6 H6a H6b H6sa, sb Remove
Factor of adhesion	1 : 4.21
Optimal speed	29 km/h
Power-to-weight ratio	10.0 kW/t
Heating Surface Equivalent	345.0 m²
Cylinder volume/HSE	1 : 1,011.27
Adhesive weight/Total	1 : 1.13
Tractive force/Heating surface	1 : 13.53
Grate area/Heating surface	1 : 84.41
Firebox/Tube surface	1 : 14.63

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