C.F.Mozambique Beyer-Garratt Locomotives in Mozambique


Class Details by Steve Llanso of Sweat House Media

Class 911 (Locobase 2922)

Data from A[rthur] E[dward] Durrant, Garratt Locomotives of the World (revised edition) (Newton Abbott, UK: David & Charles, 1981), p.173

These Double Pacifics entered service in the South African Railways systems as class GF (Locobase 765), but 2317, 2419-2420, and 2432 were later sold to the Mozambique Railways as series 911. The CFM fitted the quartet with streamlined tanks leading and trailing the boiler section.

NB: The direct heating surface (including the firebox heating surface) is an estimate calculated by subtracting the calculated tube heating surface from the reported total evaporative heating surface.


Class 951 (Locobase 701)

Data from Gavin Hamilton's excellent compilation of Garratt data posted at [link] (6 September 2005). See also John D. Blyth, "Down The Iron Road: Garratts - The Champion Artics - 4" at [link] (first viewed July 2002) Works numbers were 2059-2070 in 1951..

Mountain Garratts delivered for Cape-gauge service.

John Blyth reported most of Mozambique's Garratts were hand-me-downs, but this class came new from Haine St Pierre. He notes that they had ".. much in common with the later types in South Africa itself (the GMA/M Classes). They were larger in the boiler, and had an unusual double Kylchap, a feature thought to be unique in Garratt practice." They are also identical to the Katangan Garratts this firm delivered in the following year.


Class 971 (Locobase 702)

Data from Gavin Hamilton's excellent compilation of Garratt data posted at [link] (6 September 2005). See also John D. Blyth, "Down The Iron Road: Garratts - The Champion Artics - 4" at [link] (first viewed July 2002)/Works numbers 28642-28646 in 1956.

John Blyth reported most of Mozambique's Garratts were hand-me-downs, but this class came new from Henschel. He notes that they had ".. much in common with the later types in South Africa itself (the GMA/M Classes). They were larger in the boiler, and had an unusual double Kylchap, a feature thought to be unique in Garratt practice." They are also identical to the Katangan Garratts this firm delivered in the following year.

Principal Dimensions by Steve Llanso of Middle Run Media
Class911951971
Locobase ID2922 701 702
RailroadC.F.MozambiqueC.F.MozambiqueC.F.Mozambique
CountryMozambiqueMozambiqueMozambique
Whyte4-6-2+2-6-44-8-2+2-8-44-8-2+2-8-4
Number in Class4125
Road Numbers911-914951-962971-975
Gauge3'6"3'6"3'6"
Number Built125
BuilderseveralFUF Haine Saint-PierreHenschel & Sohn
Year192819511956
Valve GearWalschaertWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m) 9.54 / 2.91
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)69.75 / 21.26
Axle Loading (Maximum Weight per Axle) (lbs / kg)31,808 / 14,42830,016 / 13,61532,592 / 14,784
Weight on Drivers (lbs / kg)162,400 / 73,663239,120 / 108,463256,704 / 116,439
Engine Weight (lbs / kg)326,032 / 147,886411,712 / 186,750435,232 / 197,418
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)326,032 / 147,886411,712 / 186,750435,232 / 197,418
Tender Water Capacity (gals / ML)4000 / 15.156600 / 256600 / 25
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)10 / 911 / 1011 / 10
Minimum weight of rail (calculated) (lb/yd / kg/m)45 / 22.5050 / 2553 / 26.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)54 / 137245.50 / 115648 / 1219
Boiler Pressure (psi / kPa)185 / 1280180 / 1240200 / 1380
High Pressure Cylinders (dia x stroke) (in / mm)16" x 26" / 406x660 (4)19" x 24" / 483x610 (4)19" x 24" / 483x610 (4)
Tractive Effort (lbs / kg)38,765 / 17583.5358,268 / 26429.9561,370 / 27837.00
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.19 4.10 4.18
Heating Ability
Tubes (number - dia) (in / mm)234 - 2" / 51
Flues (number - dia) (in / mm)32 - 5.5" / 140
Flue/Tube length (ft / m)11.72 / 3.57
Firebox Area (sq ft / m2)276 / 25.65236 / 21.93280 / 26.02
Grate Area (sq ft / m2)44 / 4.0957.40 / 5.3361.30 / 5.70
Evaporative Heating Surface (sq ft / m2)2242 / 208.362496 / 231.972626 / 244.05
Superheating Surface (sq ft / m2)473 / 43.96610 / 56.69874 / 81.23
Combined Heating Surface (sq ft / m2)2715 / 252.323106 / 288.663500 / 325.28
Evaporative Heating Surface/Cylinder Volume185.27158.46166.71
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation814010,33212,260
Same as above plus superheater percentage952412,39815,325
Same as above but substitute firebox area for grate area59,74050,97670,000
Power L110,841794312,080
Power MT883.02585.86829.96

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