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Victorian Railways class DD
Australia | 1902 | 261 produced
D<sup>D</sup> No. 5902 on a factory photo
DD No. 5902 on a factory photo
VariantDDsuperheatedDDE
General
Built1902-1916from 1914from 1908
ManufacturerNewport, Ballarat North, Bendigo, Baldwin, Beyer, Peacock & Co., Walkers, Thompsons Ltd, Phoenix FoundryNewport
Axle config4-6-0 (Ten-wheeler) 4-6-2T (Pacific) 
Gauge5 ft 3 in (Irish broad gauge)
Dimensions and Weights
Length57 ft 4 9/16 in41 ft 10 3/8 in
Wheelbase24 ft 3 1/2 in31 ft 4 1/2 in
Fixed wheelbase13 ft12 ft 10 in
Total wheelbase48 ft 6 in48 ft
Service weight118,720 lbs122,976 lbs154,560 lbs
Adhesive weight86,912 lbs87,808 lbs96,992 lbs
Total weight212,352 lbs217,616 lbs
Axle load29,120 lbs29,344 lbs32,480 lbs
Water capacity5,068 us gal5,058 us gal
Fuel capacity11,200 lbs (coal)
Power
Power sourcesteam
Estimated power700 hp (522 kW)800 hp (597 kW)750 hp (559 kW)
Optimal speed22 mph26 mph20 mph
Starting effort20,375 lbf19,368 lbf24,196 lbf
Power Plant
Driver diameter61.5 in61 in
Boiler pressure175 psi165 psi185 psi
Expansion typesimple
Cylinderstwo, 18 x 26 intwo, 19 x 26 in
Boiler
Grate area21.2 sq ft22.5 sq ft
Firebox area107.5 sq ft120 sq ft
Tube heating area1,267.5 sq ft1,034 sq ft1,288 sq ft
Evaporative heating area1,375 sq ft1,154 sq ft1,408 sq ft
Superheater area334 sq ft
Total heating area1,375 sq ft1,488 sq ft1,408 sq ft
Calculated Values
steam locomotive
passenger
tank locomotive
last changed: 09 2023
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