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Victorian Railways class R
Australia | 1951 | 70 produced
R 710 on a works photo
R 710 on a works photo

The class R was only created after the Second World War as an express locomotive to replace the class A2 ten-wheelers. By installing a stoker, they wanted to ensure that it would perform well with coal of varying grades. The 70 locos arrived at the same time as some diesel and electric locos, giving them a very short career in service pulling express trains. They were then put into a wide variety of services, in which they performed well despite often poor maintenance. Today there are still six locomotives, four of which are still operational and partly had multiple operators. The R 766 was even converted to standard gauge

General
Built1951-1953
ManufacturerNorth British
Axle config4-6-4 (Hudson) 
Gauge5 ft 3 in (Irish broad gauge)
Dimensions and Weights
Length77 ft 3 3/16 in
Wheelbase36 ft 3 in
Fixed wheelbase12 ft 10 in
Total wheelbase67 ft
Service weight240,016 lbs
Adhesive weight131,040 lbs
Total weight418,544 lbs
Axle load43,680 lbs
Water capacity10,809 us gal
Fuel capacity13,440 lbs (coal)
Power
Power sourcesteam
Estimated power2,200 hp (1,641 kW)
Optimal speed44 mph
Starting effort31,653 lbf
Power Plant
Driver diameter73 in
Boiler pressure215 psi
Expansion typesimple
Cylinderstwo, 21 1/4 x 28 in
Boiler
Grate area42 sq ft
Firebox area285 sq ft
Tube heating area1,958 sq ft
Evaporative heating area2,243 sq ft
Superheater area462 sq ft
Total heating area2,705 sq ft
Calculated Values
steam locomotive
express
last changed: 07/2023
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