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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 H6a H6 H6a H6b H6sa, sb Remove
Built	1901-1905
Manufacturers	ALCO, Baldwin
Wheel arrangement	2-8-0 (Consolidation)
Gauge	1,435 mm (Standard gauge)

Dimensions and weights

Property	Pennsylvania class H6 H6a H6 H6a H6b H6sa, sb Remove
Length	20.09 m
Wheelbase	7.54 m
Rigid wheelbase	5.04 m
Total wheelbase	17.68 m
Service weight	88.2 t
Adhesive weight	79.7 t
Axle load	19.9 t
Total weight	151.2 t
Water capacity	27,255 l
Fuel capacity	12.7 t (coal)

Boiler

Property	Pennsylvania class H6 H6a H6 H6a H6b H6sa, sb Remove
Grate area	4.552 m²
Firebox surface	17.559 m²
Tube heating surface	249.817 m²
Evaporative heating surface	267.375 m²
Total heating surface	267.4 m²

Power plant

Property	Pennsylvania class H6 H6a H6 H6a H6b H6sa, sb Remove
Driver diameter	1,422 mm
Boiler pressure	14.1 bar
Expansion type	simple expansion
Cylinders	two, 559 x 711 mm

Power

Property	Pennsylvania class H6 H6a H6 H6a H6b H6sa, sb Remove
Power source	steam
Estimated power	1,193 kW (1,622 PS)
Top speed	97 km/h
Starting effort	187.6 kN

Calculated values

Property	Pennsylvania class H6 H6a H6 H6a H6b H6sa, sb Remove
Factor of adhesion	1 : 4.17
Optimal speed	39 km/h
Power-to-weight ratio	13.5 kW/t
Heating Surface Equivalent	355.2 m²
Cylinder volume/HSE	1 : 982.17
Adhesive weight/Total	1 : 1.11
Tractive force/Heating surface	1 : 14.65
Grate area/Heating surface	1 : 58.74
Firebox/Tube surface	1 : 14.23

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