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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 H9s H8a H8sb H9s H10s Remove
Built	1913-1914
Manufacturers	Baldwin, Altoona
Wheel arrangement	2-8-0 (Consolidation)
Gauge	1,435 mm (Standard gauge)

Dimensions and weights

Property	Pennsylvania classes H8, H9 and H10 H9s H8a H8sb H9s H10s Remove
Wheelbase	7.87 m
Rigid wheelbase	5.19 m
Total wheelbase	19.05 m
Service weight	113.4 t
Adhesive weight	99.8 t
Axle load	28.3 t
Total weight	176.4 t
Water capacity	34,069 l
Fuel capacity	15.4 t (coal)

Boiler

Property	Pennsylvania classes H8, H9 and H10 H9s H8a H8sb H9s H10s Remove
Grate area	5.118 m²
Firebox surface	19.603 m²
Tube heating surface	265.61 m²
Evaporative heating surface	285.213 m²
Superheater surface	56.95 m²
Total heating surface	342.2 m²

Power plant

Property	Pennsylvania classes H8, H9 and H10 H9s H8a H8sb H9s H10s Remove
Driver diameter	1,575 mm
Boiler pressure	14.1 bar
Expansion type	simple expansion
Cylinders	two, 635 x 711 mm

Power

Property	Pennsylvania classes H8, H9 and H10 H9s H8a H8sb H9s H10s Remove
Power source	steam
Estimated power	1,641 kW (2,231 PS)
Starting effort	218.8 kN

Calculated values

Property	Pennsylvania classes H8, H9 and H10 H9s H8a H8sb H9s H10s Remove
Factor of adhesion	1 : 4.47
Optimal speed	47 km/h
Power-to-weight ratio	14.5 kW/t
Heating Surface Equivalent	497.1 m²
Cylinder volume/HSE	1 : 906.13
Adhesive weight/Total	1 : 1.14
Tractive force/Heating surface	1 : 13.35
Grate area/Heating surface	1 : 66.85
Firebox/Tube surface	1 : 13.55
Total/Superheater	1 : 5.01

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