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French Northern Railway No. 3.1201 to 3.1290 “Super Pacific”
French State Railway 231 C and D
France | 1923
90 produced
SNCF 231 C 61 (third series) in Caudry on an old postcard
SNCF 231 C 61 (third series) in Caudry on an old postcard
Variant3.201-3.12403.1241-3.12483.1251-3.1290
General
Built1923-192519301930-1931
ManufacturerANF Blanc-Misseron, SFCMSFCM
Axle config4-6-2 (Pacific) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length loco41 ft 1 5/16 in
Wheelbase34 ft 2 1/4 in
Rigid wheelbase13 ft 2 1/4 in
Service weight218,698 lbs221,344 lbs221,564 lbs
Adhesive weight124,120 lbs125,884 lbs125,222 lbs
Water capacity8,982 us gal9,774 us gal
Fuel capacity19,842 lbs (coal)
Boiler
Grate area38.1 sq ft
Firebox area169 sq ft
Tube heating area2,029 sq ft
Evaporative heating area2,198 sq ft
Superheater area686.7 sq ft
Total heating area2,884.7 sq ft
Variant3.201-3.12403.1241-3.12483.1251-3.1290
Power Plant
Driver diameter74.8 in
Boiler pressure247 psi
Expansion typecompound
Cylindersfour, HP: 17 5/16 x 26 in
and LP: 24 7/16 x 27 3/16 in
Power
Power sourcesteam
Estimated power2,803 hp (2,090 kW)
Optimal speed61 mph
Top speed81 mph
Starting effort29,491 lbf
with start valve35,389 lbf
Calculated Values
steam locomotive
express
De Glehn compound
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