loco-info.com
The reference for locomotives and railcars
Navigation
Random
Search
Compare
Settings

Navigation

Steam
Tender Locomotives with up to Two Coupled Axles
Tender Locomotives with Three Coupled Axles
Tender Locomotives with Four and More Coupled Axles
0-8-0 „Eight-Coupled”
2-8-0 “Consolidation”
2-8-2 “Mikado”
4-8-0 “Twelve-wheeler”
4-8-2 “Mountain”
Boston & Maine class R-1
Canadian National class U-1a and U-1b
Grand Trunk Western classes U-1c, d and e
Canadian National class U-1f
Chesapeake & Ohio classes J-1 and J-2
Chōsen Government Railway Matei class
German Reichsbahn 08 1001
Florida East Coast class 801
French State Railway 241 P
Great Northern (US) class P-1
Natal Government Railways class B (1906)
Natal Government Railways class C 4-8-2T
New York Central class L-2 “Mohawk”
New York Central class L-3 “Mohawk”
New Zealand Railways classes J, JA and JB
Norte series 4600
Paris-Lyon-Méditerranée 241 A and D
Pennsylvania classes M1 and M1a
Soo Line class N-20
South African class 12A
US Railroad Administration Light Mountain
US Railroad Administration Heavy Mountain
Western Australian Government Railways class W
Chicago, Rock Island & Pacific (Rock Island) class M-50
Florida East Coast class 401
New York Central class L-4 “Mohawk”
Southern Pacific classes MT-1, MT-3, MT-4 and MT-5
South African class 19A
2-8-4 “Berkshire”
4-8-4 “Northern”
0-10-0 “Ten-coupled”
2-10-0
2-10-2 “Santa Fé”
2-10-4 “Texas”
4-10-0 “Mastodon” and 4-10-2 “Reid Ten-wheeler”
Six or seven coupled axles
Tank Locomotives up to Two Coupled Axles
Tank Locomotives with Three Coupled Axles
Tank Locomotives Four and More Coupled Axles
Articulated and Bogie
Special Types
Electric
Diesel
Railcars and Multiple Units
Page views since 2023-01-26: 437453
South African class 12A
South Africa | 1919 | 75 produced
No. 1548 on a Henschel works photo
No. 1548 on a Henschel works photo
collection Leith Paxton
Variant12Arebuilt 12AR
General
Built1919-1929
ManufacturerNorth British, Henschel
Axle config4-8-2 (Mountain) 
Gauge3 ft 6 in (Cape gauge)
Dimensions and Weights
Length66 ft 11 5/8 in69 ft 7 in
Wheelbase32 ft 1 in
Rigid wheelbase13 ft 6 in
Total wheelbase58 ft 7 1/4 in61 ft 7 3/8 in
Service weight221,785 lbs222,226 lbs
Adhesive weight154,897 lbs154,456 lbs
Total weight336,205 lbs370,156 lbs
Axle load38,757 lbs38,978 lbs
Water capacity5,104 us gal7,206 us gal
Fuel capacity22,400 lbs (coal)26,880 lbs (coal)
Boiler
Grate area40.5 sq ft41 sq ft
Firebox area209 sq ft164 sq ft
Tube heating area2,301 sq ft2,338 sq ft
Evaporative heating area2,510 sq ft2,502 sq ft
Superheater area466 sq ft480 sq ft
Total heating area2,976 sq ft2,982 sq ft
Variant12Arebuilt 12AR
Power Plant
Driver diameter51 in
Boiler pressure190 psi
Expansion typesimple
Cylinderstwo, 24 x 26 in
Power
Power sourcesteam
Estimated power1,300 hp (969 kW)
Optimal speed17 mph
Starting effort47,424 lbf
Calculated Values
steam locomotive
freight
passenger
last changed: 09 2023
Newsletter
Legal Notice
About
Support this project
loading...

We use cookies to save the following settings:

  • selected navigation structure
  • selected language
  • preferred units
  • spelling of railway company names

If you refuse the use of cookies, the settings will only be retained for the current session and will be reset to the default values the next time you visit the site.

Display of units

Here you can set the desired unit system for the technical data.

  • Metric: Lengths in meters, weights in tonnes, and volumes in cubic meters
  • Imperial (UK): Lengths in feet/inches, weights in long tons and volumes in imperial gallons
  • Imperial (US): Lengths in feet/inches, weights in pounds, and volumes in US gallons
  • Individual: Depends on the country of origin of each locomotive
Operator names

Here you can set the display of railway company names.

  • Short: Abbreviation or short form of the name
  • Standard: commonly used name, partially translated to English
  • Complete: full name in local language