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Pennsylvania class E2

The first built E2 No. 269

To overcome the disadvantages of the class E1 Camelback Atlantics, the E2 was developed in a conventional arrangement. The elimination of the Wootten firebox reduced the grate area from 69 to 51 square feet and elimin...

	Pennsylvania class E2 Remove
Variant	E2d E2 E2a E2d E2sd
Built	1906-1908
Manufacturers	Altoona
Wheel arrangement	2B1
Gauge	1435 mm
Length
Service mass	86364 kg
Top speed
Power
Engine

General

Property	Pennsylvania class E2 E2d E2 E2a E2d E2sd Remove
Built	1906-1908
Manufacturers	Altoona
Wheel arrangement	4-4-2 (Atlantic)
Gauge	1,435 mm

Dimensions and weights

Property	Pennsylvania class E2 E2d E2 E2a E2d E2sd Remove
Wheelbase	9.40 m
Total wheelbase	18.35 m
Service mass	86.4 t
Adhesion mass	55.7 t
Total mass	147.6 t
Rigid wheelbase	2.26 m
Axle load	28.3 t
Water capacity	21,955 l
Fuel capacity	12.3 t (coal)

Boiler

Property	Pennsylvania class E2 E2d E2 E2a E2d E2sd Remove
Grate area	5.156 m²
Firebox surface	15.422 m²
Tube heating surface	229.842 m²
Evaporative heating surface	245.264 m²
Total heating surface	245.3 m²

Power plant

Property	Pennsylvania class E2 E2d E2 E2a E2d E2sd Remove
Driver diameter	2,032 mm
Boiler pressure	14.1 bar
Expansion type	simple expansion
Cylinders	two, 521 x 660 mm

Power

Property	Pennsylvania class E2 E2d E2 E2a E2d E2sd Remove
Power source	steam
Estimated power	1,193 kW (1,622 PS)
Starting effort	105.9 kN

Calculated values

Property	Pennsylvania class E2 E2d E2 E2a E2d E2sd Remove
Factor of adhesion	1 : 5.17
Optimal speed	69 km/h
Power-to-weight ratio	13.8 kW/t
Heating Surface Equivalent	322.4 m²
Cylinder volume/HSE	1 : 872.45
Adhesive weight/Total	1 : 1.55
Tractive force/Heating surface	1 : 9.01
Grate area/Heating surface	1 : 47.57
Firebox/Tube surface	1 : 14.90

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