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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...

General

Property	Pennsylvania class E2 E2 E2 E2a E2d E2sd Remove
Built	1901-1902
Manufacturers	Altoona
Wheel arrangement	4-4-2 (Atlantic)
Gauge	1,435 mm (Standard gauge)

Dimensions and weights

Property	Pennsylvania class E2 E2 E2 E2a E2d E2sd Remove
Wheelbase	9.40 m
Rigid wheelbase	2.29 m
Total wheelbase	16.40 m
Service weight	76.8 t
Adhesive weight	50.2 t
Axle load	23.2 t
Water capacity	15,142 l
Fuel capacity	5.9 t (coal)

Boiler

Property	Pennsylvania class E2 E2 E2 E2a E2d E2sd Remove
Grate area	4.738 m²
Firebox surface	14.121 m²
Tube heating surface	211.633 m²
Evaporative heating surface	225.755 m²
Total heating surface	225.8 m²

Power plant

Property	Pennsylvania class E2 E2 E2 E2a E2d E2sd Remove
Driver diameter	2,032 mm
Boiler pressure	12.8 bar
Expansion type	simple expansion
Cylinders	two, 521 x 660 mm

Power

Property	Pennsylvania class E2 E2 E2 E2a E2d E2sd Remove
Power source	steam
Estimated power	1,044 kW (1,419 PS)
Starting effort	95.5 kN

Calculated values

Property	Pennsylvania class E2 E2 E2 E2a E2d E2sd Remove
Factor of adhesion	1 : 5.15
Optimal speed	68 km/h
Power-to-weight ratio	13.6 kW/t
Heating Surface Equivalent	296.4 m²
Cylinder volume/HSE	1 : 949.04
Adhesive weight/Total	1 : 1.53
Tractive force/Heating surface	1 : 8.84
Grate area/Heating surface	1 : 47.65
Firebox/Tube surface	1 : 14.99

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