The reference for locomotives and railcars


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Pennsylvania class G5s
United States | 1923 | 90 produced
Railway and Locomotive Engineering, November 1923

For local service, the PRR needed a locomotive with great tractive effort and fast acceleration, as there were many grades. In order to be able to prevent double heading with locomotives with two driving axles, a locomotive with three driving axles was required. The choice fell on a ten-wheeler, i.e. on the wheel arrangement 4-6-0. The boiler could be taken from the class E-6s Atlantic and the class H-10s Consolidation

The mass balancing was designed as good as possible and moving parts were constructed as light as possible without sacrificing strength. Despite a wheel diameter of only 68 inches, a top speed of 70 mph could be approved.

The Altoona workshops made 90 locomotives for the PRR and 31 identical ones for the Long Island Railroad. The locomotives apparently fulfilled their purpose, since they achieved the required acceleration performance and could easily keep to the timetables. Despite this, it was reported that they had insufficient running smoothness and a high consumption of coal and water. However, they remained in service as long as there was steam service on the PRR.

Axle config4-6-0 (Ten-wheeler) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Wheelbase26 ft 6 in
Fixed wheelbase14 ft 3 in
Total wheelbase64 ft 11 1/2 in
Service weight237,000 lbs
Adhesive weight178,000 lbs
Total weight413,000 lbs
Axle load63,000 lbs
Water capacity7,800 us gal
Fuel capacity26,000 lbs (coal)
Power sourcesteam
Estimated power2,100 hp (1,566 kW)
Optimal speed32 mph
Top speed70 mph
Starting effort41,328 lbf
Power Plant
Driver diameter68 in
Boiler pressure205 psi
Expansion typesimple
Cylinderstwo, 24 x 28 in
Grate area55.1 sq ft
Firebox area177 sq ft
Tube heating area2,678 sq ft
Evaporative heating area2,855 sq ft
Superheater area613 sq ft
Total heating area3,468 sq ft
Calculated Values
steam locomotive
last changed: 04/2023

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