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.
Data from Gavin Hamilton's excellent compilation of Garratt data posted at [] (6 September 2005). See also John D. Blyth, "Down The Iron Road: Garratts - The Champion Artics - 4" at [] (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.
Data from Gavin Hamilton's excellent compilation of Garratt data posted at [] (6 September 2005). See also John D. Blyth, "Down The Iron Road: Garratts - The Champion Artics - 4" at [] (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 | |||
---|---|---|---|
Class | 911 | 951 | 971 |
Locobase ID | 2922 | 701 | 702 |
Railroad | C.F.Mozambique | C.F.Mozambique | C.F.Mozambique |
Country | Mozambique | Mozambique | Mozambique |
Whyte | 4-6-2+2-6-4 | 4-8-2+2-8-4 | 4-8-2+2-8-4 |
Number in Class | 4 | 12 | 5 |
Road Numbers | 911-914 | 951-962 | 971-975 |
Gauge | 3'6" | 3'6" | 3'6" |
Number Built | 12 | 5 | |
Builder | several | FUF Haine Saint-Pierre | Henschel & Sohn |
Year | 1928 | 1951 | 1956 |
Valve Gear | Walschaert | Walschaert | Walschaert |
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 / 14,428 | 30,016 / 13,615 | 32,592 / 14,784 |
Weight on Drivers (lbs / kg) | 162,400 / 73,663 | 239,120 / 108,463 | 256,704 / 116,439 |
Engine Weight (lbs / kg) | 326,032 / 147,886 | 411,712 / 186,750 | 435,232 / 197,418 |
Tender Loaded Weight (lbs / kg) | |||
Total Engine and Tender Weight (lbs / kg) | 326,032 / 147,886 | 411,712 / 186,750 | 435,232 / 197,418 |
Tender Water Capacity (gals / ML) | 4000 / 15.15 | 6600 / 25 | 6600 / 25 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 10 / 9 | 11 / 10 | 11 / 10 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 45 / 22.50 | 50 / 25 | 53 / 26.50 |
Geometry Relating to Tractive Effort | |||
Driver Diameter (in / mm) | 54 / 1372 | 45.50 / 1156 | 48 / 1219 |
Boiler Pressure (psi / kPa) | 185 / 1280 | 180 / 1240 | 200 / 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 / 17583.53 | 58,268 / 26429.95 | 61,370 / 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 / 25.65 | 236 / 21.93 | 280 / 26.02 |
Grate Area (sq ft / m2) | 44 / 4.09 | 57.40 / 5.33 | 61.30 / 5.70 |
Evaporative Heating Surface (sq ft / m2) | 2242 / 208.36 | 2496 / 231.97 | 2626 / 244.05 |
Superheating Surface (sq ft / m2) | 473 / 43.96 | 610 / 56.69 | 874 / 81.23 |
Combined Heating Surface (sq ft / m2) | 2715 / 252.32 | 3106 / 288.66 | 3500 / 325.28 |
Evaporative Heating Surface/Cylinder Volume | 185.27 | 158.46 | 166.71 |
Computations Relating to Power Output (More Information) | |||
Robert LeMassena's Power Computation | 8140 | 10,332 | 12,260 |
Same as above plus superheater percentage | 9524 | 12,398 | 15,325 |
Same as above but substitute firebox area for grate area | 59,740 | 50,976 | 70,000 |
Power L1 | 10,841 | 7943 | 12,080 |
Power MT | 883.02 | 585.86 | 829.96 |