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Pennsylvania classes H8, H9 and H10

H10s No. 8811, built for the Vandalia Railroad, in July 1935 in Peoria, Illinois

From 1907 onwards, the PRR started with procuring 540 Consolidations of classes H8 to H8c, most of which were still operated with saturated steam . In addition, 146 of them had already been built as H8sb or H8sc with ...

General

Property	Pennsylvania classes H8, H9 and H10 H8a H8a H8sb H9s H10s Remove
Built	1907-1913
Manufacturers	Altoona, ALCO, Baldwin
Wheel arrangement	2-8-0 (Consolidation)
Gauge	1,435 mm (Standard gauge)

Dimensions and weights

Property	Pennsylvania classes H8, H9 and H10 H8a H8a H8sb H9s H10s Remove
Wheelbase	7.87 m
Rigid wheelbase	5.19 m
Total wheelbase	18.09 m
Service weight	109.3 t
Adhesive weight	98.2 t
Axle load	28.3 t
Total weight	181.4 t
Water capacity	26,498 l
Fuel capacity	11.3 t (coal)

Boiler

Property	Pennsylvania classes H8, H9 and H10 H8a H8a H8sb H9s H10s Remove
Grate area	5.118 m²
Firebox surface	17.837 m²
Tube heating surface	339.282 m²
Evaporative heating surface	357.12 m²
Total heating surface	357.1 m²

Power plant

Property	Pennsylvania classes H8, H9 and H10 H8a H8a H8sb H9s H10s Remove
Driver diameter	1,575 mm
Boiler pressure	14.1 bar
Expansion type	simple expansion
Cylinders	two, 610 x 711 mm

Power

Property	Pennsylvania classes H8, H9 and H10 H8a H8a H8sb H9s H10s Remove
Power source	steam
Estimated power	1,417 kW (1,927 PS)
Starting effort	201.6 kN

Calculated values

Property	Pennsylvania classes H8, H9 and H10 H8a H8a H8sb H9s H10s Remove
Factor of adhesion	1 : 4.78
Optimal speed	43 km/h
Power-to-weight ratio	13.0 kW/t
Heating Surface Equivalent	446.3 m²
Cylinder volume/HSE	1 : 930.19
Adhesive weight/Total	1 : 1.11
Tractive force/Heating surface	1 : 11.79
Grate area/Heating surface	1 : 69.78
Firebox/Tube surface	1 : 19.02

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