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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	E2sd E2 E2a E2d E2sd
Built	1913
Manufacturers	Altoona
Wheel arrangement	2B1
Gauge	1435 mm
Length
Service mass	87634 kg
Top speed
Power
Engine

General

Property	Pennsylvania class E2 E2sd E2 E2a E2d E2sd Remove
Built	1913
Manufacturers	Altoona
Wheel arrangement	4-4-2 (Atlantic)
Gauge	1,435 mm

Dimensions and weights

Property	Pennsylvania class E2 E2sd E2 E2a E2d E2sd Remove
Wheelbase	9.39 m
Total wheelbase	18.45 m
Service mass	87.6 t
Adhesion mass	57.1 t
Total mass	156.5 t
Rigid wheelbase	2.26 m
Axle load	28.7 t
Water capacity	21,955 l
Fuel capacity	14.2 t (coal)

Boiler

Property	Pennsylvania class E2 E2sd E2 E2a E2d E2sd Remove
Grate area	5.156 m²
Firebox surface	17.373 m²
Tube heating surface	172.242 m²
Evaporative heating surface	189.615 m²
Superheater surface	38.276 m²
Total heating surface	227.9 m²

Power plant

Property	Pennsylvania class E2 E2sd E2 E2a E2d E2sd Remove
Driver diameter	2,032 mm
Boiler pressure	13.4 bar
Expansion type	simple expansion
Cylinders	two, 521 x 660 mm

Power

Property	Pennsylvania class E2 E2sd E2 E2a E2d E2sd Remove
Power source	steam
Estimated power	1,305 kW (1,774 PS)
Starting effort	100.7 kN

Calculated values

Property	Pennsylvania class E2 E2sd E2 E2a E2d E2sd Remove
Factor of adhesion	1 : 5.56
Optimal speed	79 km/h
Power-to-weight ratio	14.9 kW/t
Heating Surface Equivalent	353.0 m²
Cylinder volume/HSE	1 : 796.69
Adhesive weight/Total	1 : 1.54
Tractive force/Heating surface	1 : 9.23
Grate area/Heating surface	1 : 44.20
Firebox/Tube surface	1 : 9.91
Total/Superheater	1 : 4.95

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