Data from Gustav Reder (Michael Reynolds, trans), The World of Steam Locomotives (New York: Putnam, 1974), p.255; and "'Modified Fairlie' Locomotive for the South African Rys", Locomotive Magazine, Volume XXXI [31] (15 June 1925), pp. 168-170. Works number was 23140 in 1925.
Designed as a "modified Fairlie", this engine has a double firebox and two boilers on a single rigid frame. The two sets of engine bogies pivot underneath, showing that this actually was a Kitson-Meyer type. LM's report reproduced Collins's claims that putting the boiler, firebox, grate and both tank and bunker on the rigid frame meant all axles bore their share of the weight as the enigne consumed water and coall Reder explained that SAR's Lt Colonel F R Collins obtained this batch of engines to see if they could offer competition to the Beyer-Garratts, then monopolizing the articulated stud. Alas, reports Reder, "In negotiating curves, the pivot pins came under too much stress due to the pronounced lateral sway of the long overhangs. These engines thus proved more expensive to maintain than the Garratt locomotives, and as a result were soon scrapped."Data from Holland, Volume II (1972), pp. 50-51. Works numbers were 23294-23297 in 1926.
As explained in Locobase 13096, the "Modified Fairlies" that Colonel FR Collins ordered were actually very similar to Kitson-Meyers, although the firebox layout was different. In any case, they were "...not very satisfactory" says Holland. "[T]he long overhang at front and back tended to vibrate in an up-and-down directions when the engine was in motion with a consequent setting up of metal fatigue and cracking of the frames." Otherwise, Holland concedes, they were "powerful and good steamers", but did not last long in service.
Data from Holland (1972,II), pp. 41; "'Garratt' Locomotive for the South African Railways', Locomotive Magazine, Volume XXVII [27] (14 May 1921), pp. 113-114; M C Williams, "The Advantages of Articulated Locomotives", Railway Gazette, Volume 37, No 5 (4 August 1942), pp. 160-167; and "Recent 'Garratt' Patent Locomotives", Railway Engineer, Volume 43, No. 5 (May 1922), pp. 184-186. See also Peter Ball, "The Big Fiery Giant - The Story of the Beyer-Garratt Locomotive", The Heritage Portal (South Africa), dated Tuesday, November 17, 2015 - 15:43, at []; and "Garratt Articulated Locomotives", Railway Age, Volume 74 (14 April 1923), p. 959. Works number was 5941 in 1918.
Data from D F Holland, Steam Locomotives of the South African Railways. 2: 1910-1955 (1st ed.). (Newton Abbott, England: David & Charles, 1972, pp. 41-42; and M C Williams, "The Advantages of Articulated Locomotives", Railway Gazette, Volume 37, No 5 (4 August 1942), pp. 160-167. See also "Recent 'Garratt' Patent Locomotives", Railway Engineer, Volume 43, No. 5 (May 1922), pp. 184-186; Cdr J Plomer, "A Long Line of Mountains", The Railway and Locomotive Historical Society Bulletin, No. 122 (April 1970), pp. 7-25. and "South African Class GB 2-6-2+2-6-2" in Wikipedia at [], last accessed 24 August 2021. Works numbers were 5942 in 1921, 6181-6186 in 1924.
Data from Weiner (1930). See also Holland (1972,II), pp. 43; and "South African Railway-Design 02400", Beyer-Garrrat Patent Articulated Locomotives (Manchester, England: Beyer-Peacock & Company Limited, 1931), archived on flickr's Historical Railway Images at [], et seq, p. 38. Works numbers 6187-6192 in 1924.
Data from DF Holland, Volume II (1972), pp. 52-53; and South African Railways & Harbors 8 - 1941 Locomotive Diagram book supplied in August 2013 by Allen Stanley from his extensive Rail Data Exchange. See also [], last accessed 12 June 2016.. Works numbers were 970-982 in 1927, 1043-1068 in 1928.
Data from Wiener (1930); and "South African Railway-Design 116", Beyer-Garrrat Patent Articulated Locomotives (Manchester, England: Beyer-Peacock & Company Limited, 1931), archived on flickr's Historical Railway Images at [], et seq, p. 39-40 See also Gavin Hamilton's site at [
] (6 September 2005); and Holland, Volume II (1972), pp.
Data from locomotive diagrams published on [] . See also Holland, Volume II (1972), pp. 61-62; and A[rthur] E[dward] Durrant, Garratt Locomotives of the World (revised edition) (Newton Abbott, UK: David & Charles, 1981), p. 117. Works numbers were 3115-3119 in 1929.
Data from Holland, Volume II (1972), pp. 31-32; and Reference 153 in South Aftrican Railways & Harbours 8 - 1941 Locomotive Diagrams NG supplied in August 2013 by Allen Stanley from his extensive Rail Data Exchange collection. Works numbers were 6193-6198 in 1925.
This was the first of three batches of powerful Double Mikado Garratts for use on the Zeerust-Mafeking and Pretoria-Pietersburg heavy freight service. All had the same boiler, but these first six had slightly more firebox area. (GEs from the second order appear in Locobase 761 and from the third order in 2907.Data from Holland, Volume II (1972), pp.45; and Reference 153 in South Aftrican Railways & Harbours 8 - 1941 Locomotive Diagrams NG supplied in August 2013 by Allen Stanley from his extensive Rail Data Exchange collection. Works numbers were 6339-6348 in 1927.
Two years after the first batch of GE Double Mikados (Locobase 4382), Beyer Peacock delivered this second batch of Double Mikado Garratts in 1927. These had the same boilers, but slightly less superheat and smaller fireboxes. See Locobase 2907 for the third batch.Data from Holland, Volume II (1972), pp. 45; A[rthur] E[dward] Durrant, Garratt Locomotives of the World (revised edition) (Newton Abbott, UK: David & Charles, 1981), p 122; and Reference 153 in South Aftrican Railways & Harbours 8 - 1941 Locomotive Diagrams NG supplied in August 2013 by Allen Stanley from his extensive Rail Data Exchange collection. Works numbers were 6716-6717 in 1931.
This duo was the third batch of Class GE Double Mikado Garratts first put into service in 1924 (Locobase 4382) and 1927 (Locobase 761), but with cylinders 1"(25.4 mm) larger in diameter and small increases in heating surface including 27 sq ft of arch tubes. At the time of their introduction, they probably were the most powerful narrow-gauge locomotives in service. Durrant reported that GEs first seved the diffiecult main line between Johnnaesburg-Zeerust. Later the class handled North coast trains from Durban as well as branch line operations from Eshowe and Nkwallini.
Data from Holland (1972, II); and South African Railways & Harbors 8 - 1941 Locomotive Diagram book supplied in August 2013 by Allen Stanley from his extensive Rail Data Exchange; and South African Class GEA 4-8-2+2-8-4 in Wikipedia at [], last accessed 19 September 2021. Works numbers were 7168-7227 in 1946.
Data from diagrams published on the web at [] (visited 5 January 2001); A[rthur] E[dward] Durrant, Garratt Locomotives of the World (revised edition) (Newton Abbott, UK: David & Charles, 1981), p 121. Works numbers 10512-10548 in 1927
Data from Holland, Volume II (1972), p. 47-49; "South African Railway-Design 113", Beyer-Garrrat Patent Articulated Locomotives (Manchester, England: Beyer-Peacock & Company Limited, 1931), archived on flickr's Historical Railway Images at [], et seq, p. 42.
Data from DF Holland, Volume II (1972), p. 57; and South African Railways & Harbors 8 - 1941 Locomotive Diagram supplied in August 2013 by Allen Stanley from his extensive Rail Data Exchange.\). See also Phil Girdlestone & Shaun McMahon, "2ft gauge Little Titans for the Welsh Highland - The 'NGG16s'" published in 1994 and archived at [], last accessed 17 February 2014. Martyn Bane wrote an equally good and comprehensive article on these two Garratts' restoration titled "Alfred County Railway - Garratt 2-6-2+2-6-2 NGG16A Nos. 141 & 155", archived at [
]. . Works numbers were 5687-5688 in 1928.
Data from Holland, Volume II (1972), p. 61; and "South African Railways, Design No. 1162", Beyer-Garrrat Patent Articulated Locomotives (Manchester, England: Beyer-Peacock & Company Limited, 1931), archived on flickr's Historical Railway Images at [], et seq, p. 44-46.; and . Works numbers were 6520-6531 in 1929, 6639-6644.
Data from Holland (1972, II); A[rthur] E[dward] Durrant, Garratt Locomotives of the World (revised edition) (Newton Abbott, UK: David & Charles, 1981), pp 129-130; and "Class GM", Reference Item 159, Index of Diagrams of Steam Locomotives" (Pretoria, South Africa: Chief Mechanical Engineer, 1941), p 33. . Works numbers were 6883-6898 in 1938.
Durrant noted the ten-year reign of Chief Mechanical Engineer AG Watson from 1929-1938 in which he studiously avoided ordering more articulated locomotives. As soon as W A J Day took over as CME, he ordered these Double Mountain Garratts, which were essentially GLs designed to a requirement to handle larger trains on the 60-lb/yard (30 kg/metre) rail of the Johannesburg-Mafeking line, whose profile had a sawtooth quality of up and down grades. These engines trailed a 6,750 gallon (30,659 litre) auxiliary water tank to supplement the meager tender capacity. That small capacity resulted from the SAR's chief civil enginer's demand for a reduction in axle loadings. "The front tank," wrote Durrant, "held only enough water for shunting purposes, and the rear unity held coal only." Designated for the Zeerust line, "they revolutionised working"in that serviceData from South Aftrican Railways & Harbours 8 - 1941 Locomotive Diagrams NG supplied in August 2013 by Allen Stanley from his extensive Rail Data Exchange collection; and A[rthur] E[dward] Durrant, Garratt Locomotives of the World (revised edition) (Newton Abbott, UK: David & Charles, 1981), pp 134-135..
Firebox heating surface included 25.2 sq ft (2.34 sq m) of arch tubes. Superheat surface was later reduced to 636 sq ft (59.09 sq m).. Developments of Beyer, Peacock's pre-war GMs, these two classes of Double Mountain Garratts had cast-steel engine beds, roller bearings, a U-shaped welded foundation ring, mechanical stokers and rocking grates. GMAs had a tender water capacity of 1,650 gallons (7,494 litres) and coal capacity of 11 tons (12.1 short tons). Water capacity was augmented by a permanently coupled trailing tank car holding 6,750 gallons (30,659 litres). Henschel built the first 20 (works numbers were 28680-28704) and the last 30 (works numbers 29600-29629). Beyer, Peacock and North British split the remainder, Beyer's building 4079-4098 and 4121-4130 and NBLC supplying 4099-4140 (works numbers 27691-27702 in 1956, 27769-27778 and 27783-27792 in 1958).. They were very successful and well-balanced engines. Holland (1972, II) reports that hammer blow from their drivers didn't exceed 1 ton for any wheel at 45 mph (72 kph).
Data from Holland, II; and "South African Class GO 4-8-2+2-8-4" in Wikipedia at .[], last accessed 20 September 2021. Works numbers were 28705-28729 in 1954.
Data from Holland, Volume II (1972), p. 52. Works numbers were 20698-20707 in 1927 and 21052 in 1928.
A "modified Fairlie" designed by the SAR's Colonel Collins arrived on the Natal North Coast and disappointed at first. According to Holland, G Ramsay, mechanical engineer in the SAR's Durban shops, came up with modifications to the blast pipe arrangement. Then its power could be put to good use.
Data from South African Railways & Harbors 8 - 1941 Locomotive Diagram supplied in August 2013 by Allen Stanley from his extensive Rail Data Exchange. See also [], last accessed 12 June 2016.
Data from locomotive diagrams published on [] . See also Eryl Crump, "Welsh Highland Railway to restore a 'New' Garratt loco", North Wales Daily Post (29 June 2015) at [
], last accessed 12 June 2016; and [
], last accessed 12 June 2016.
Data from Gavin Hamilton's excellent compilation of Garratt data posted at [] (6 September 2005); and South African Railways & Harbors 8 - 1941 Locomotive Diagram supplied in August 2013 by Allen Stanley from his extensive Rail Data Exchange.\). See also Phil Girdlestone & Shaun McMahon, "2ft gauge Little Titans for the Welsh Highland - The 'NGG16s'" published in 1994 and archived at [
], last accessed 17 February 2014. Martyn Bane wrote an equally good and comprehensive article on these two Garratts' restoration titled "Alfred County Railway - Garratt 2-6-2+2-6-2 NGG16A Nos. 141 & 155", archived at [
] . Prairie Garratt based on the Cockerill-Beyer Peacock design of 1936-1938.
Data from Holland II (1972) as amended by an NG 11 diagram hosted on [], accessed 21 May 2006. See also "2-ft Gauge Garratt Locomotives, South African Rys", Locomotive Magazine, Volume 26 (14 February 1920), pp. 24-25; and "Recent 'Garratt' Patent Locomotives", Railway Engineer, Volume 43, No. 5 (May 1922), pp. 184-186. Works number was 5941 in 1918.
Data from Holland II (1972) as amended by an NG 11 diagram hosted on [], accessed 21 May 2006; and "South African Railways-Design 02406", Beyer-Garrrat Patent Articulated Locomotives (Manchester, England: Beyer-Peacock & Company Limited, 1931), archived on flickr's Historical Railway Images at [
], et seq, Beyer-Garratt Design No. 02406, pp. 16-17.
Data from Gavin Hamilton's excellent compilation of Garratt data posted at [] . (6 September 2005); and "South African Railways, Design No. 1123", Beyer-Garrrat Patent Articulated Locomotives (Manchester, England: Beyer-Peacock & Company Limited, 1931), archived on flickr's Historical Railway Images at [
],p. 18. FB works numbers were 2506-2507. These Prairie Garratts were sub contracted from Beyer Peacock (BP works #s 6365-6366).
Data from locomotive diagrams published on []
Data from Gavin Hamilton's excellent compilation of Garratt data posted at [] . (6 September 2005). See also "South African Class NG G14 2-6-2+2-6-2" in Wikipedia at [
], last accessed 15 August 2021. Works number was 10747 in 1930.
Data from DF Holland, Volume II (1972), p. 56.
Nicknamed "U-boats" to reflect both the class ID and their German origin, these "Union Garratts" were a hybrid articulated system. The Garratt-type front end held half of the total supply of water and had the pivot of the front engine located ahead of the smokebox. A second long water tank rode under the boiler. The Fairlie back end featured a fixed chassis and a pivoting rear engine under the massive coal bunker. Holland argues that adopting the long frame of the Fairlie design was intended to simplify mechanical-stoker operation. Alas for the U-boats, the original Duplex mechanical stoker was removed in 1937 and the crew fell to hand-firing because a) after all, the engines were only used for short runs on the Reef, and blockages in the stokers were difficult to clear. "It must have been heavy work," Holland adds sympathetically,"to hand-fire the sixty square feet of grate area." Holland also comments: "These were large and powerful engines, and had they been built as pure Garratts it is possible they might still have been running today [1972]."Described in Wiener (1930), pp 212, .214, but no record of works numbers. ILocobase's knowledge of its builder and history remain uncertain. Wiener gives Beyer, Peacock as the builder, but a well-known BP production list compilation shows no 4-6-2+2-6-4 Garratt built by BP for South Africa.]
Preceded the orders to German builders for slightly larger engines. Wiener noted the mixed construction in which plate frames supported the boiler and bar frames formed the bogies and trucks. Bogies traversed on swing bolsters, trailing trucks used parallel lateral displacement geometry.
Principal Dimensions by Steve Llanso of Sweat House Media | |||||
---|---|---|---|---|---|
Class | FC | FD | GA | GB | GC |
Locobase ID | 13096 | 2484 | 745 | 748 | 749 |
Railroad | South African Railways (SAR) | South African Railways (SAR) | South African Railways (SAR) | South African Railways (SAR) | South African Railways (SAR) |
Country | South Africa | South Africa | South Africa | South Africa | South Africa |
Whyte | 2-6-2+2-6-2 | 2-6-2+2-6-2 | 2-6-0+0-6-2 | 2-6-2+2-6-2 | 2-6-2+2-6-2 |
Number in Class | 1 | 3 | 1 | 6 | 6 |
Road Numbers | 670 | 671-674 | 1649 | 1650, 2160-2165/2166, 2161-2165 | 2180-2185 |
Gauge | 3'6" | 3'6" | 3'6" | 3'6" | 3'6" |
Number Built | 1 | 3 | 1 | 6 | 6 |
Builder | North British | North British | Beyer, Peacock | Beyer, Peacock | Beyer, Peacock |
Year | 1925 | 1926 | 1920 | 1921 | 1924 |
Valve Gear | Walschaert | Walschaert | Walschaert | Walschaert | Walschaert |
Locomotive Length and Weight | |||||
Driver Wheelbase (ft / m) | 16 / 4.88 | 17 / 5.18 | 9 / 2.74 | 16 / 4.88 | 16 / 4.88 |
Engine Wheelbase (ft / m) | 35.25 / 10.74 | 37.25 / 11.35 | 16.17 / 17.86 | 35.75 / 10.90 | 35.70 / 10.88 |
Ratio of driving wheelbase to overall engine wheelbase | 0.45 | 0.46 | 0.56 | 0.45 | 0.45 |
Overall Wheelbase (engine & tender) (ft / m) | 56.67 / 17.27 | 58.58 / 17.86 | 58.58 / 17.86 | 53 / 16.15 | 56.67 / 17.27 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 23,520 / 10,669 | 27,664 / 12,548 | 33,040 / 14,987 | 17,920 / 8128 | 23,520 / 10,669 |
Weight on Drivers (lbs / kg) | 138,656 / 62,893 | 163,184 / 74,019 | 234,080 / 106,177 | 106,176 / 48,161 | 141,120 / 64,011 |
Engine Weight (lbs / kg) | 223,328 / 101,300 | 255,584 / 115,931 | 299,600 / 135,896 | 170,352 / 77,270 | 216,832 / 98,353 |
Tender Loaded Weight (lbs / kg) | |||||
Total Engine and Tender Weight (lbs / kg) | 223,328 / 101,300 | 255,584 / 115,931 | 299,600 / 135,896 | 170,352 / 77,270 | 216,832 / 98,353 |
Tender Water Capacity (gals / ML) | 3600 / 13.64 | 4680 / 17.73 | 5520 / 17.42 | 2780 / 10.53 | 3600 / 13.64 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5.50 / 5 | 5.50 / 5 | 9.50 / 9 | 5.50 / 5 | 5.50 / 5 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 39 / 19.50 | 45 / 22.50 | 65 / 32.50 | 29 / 14.50 | 39 / 19.50 |
Geometry Relating to Tractive Effort | |||||
Driver Diameter (in / mm) | 42.75 / 1086 | 46 / 1168 | 48 / 1219 | 42 / 1067 | 42.75 / 1086 |
Boiler Pressure (psi / kPa) | 180 / 12.40 | 180 / 12.40 | 180 / 12.40 | 180 / 12.40 | 180 / 12.40 |
High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 23" / 356x584 (4) | 15" x 24" / 381x610 (4) | 18" x 26" / 457x660 (4) | 12" x 20" / 305x508 (4) | 14" x 23" / 356x584 (4) |
Tractive Effort (lbs / kg) | 32,268 / 14636.54 | 35,922 / 16293.96 | 53,703 / 24359.30 | 20,983 / 9517.74 | 32,268 / 14636.54 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.30 | 4.54 | 4.36 | 5.06 | 4.37 |
Heating Ability | |||||
Tubes (number - dia) (in / mm) | 143 - 2" / 51 | 190 - 2" / 51 | 279 - 2" / 51 | 119 - 1.875" / 48 | 149 - 2" / 51 |
Flues (number - dia) (in / mm) | 24 - 5.5" / 140 | 32 - 5.5" / 140 | 40 - 5.5" / 140 | 21 - 5.5" / 140 | 24 - 5.5" / 140 |
Flue/Tube length (ft / m) | 11.28 / 3.44 | 10.67 / 3.25 | 11.69 / 3.56 | 10.36 / 3.16 | 11.25 / 3.43 |
Firebox Area (sq ft / m2) | 155 / 14.40 | 178 / 16.54 | 211.30 / 19.64 | 104 / 9.66 | 156.80 / 14.57 |
Grate Area (sq ft / m2) | 34 / 3.16 | 41 / 3.81 | 51.80 / 4.81 | 23 / 2.14 | 34 / 3.16 |
Evaporative Heating Surface (sq ft / m2) | 1387 / 128.86 | 1730 / 160.72 | 2555 / 237.45 | 1018 / 94.58 | 1423 / 132.20 |
Superheating Surface (sq ft / m2) | 280 / 26.01 | 371 / 34.47 | 527 / 48.98 | 203 / 18.86 | 247 / 22.95 |
Combined Heating Surface (sq ft / m2) | 1667 / 154.87 | 2101 / 195.19 | 3082 / 286.43 | 1221 / 113.44 | 1670 / 155.15 |
Evaporative Heating Surface/Cylinder Volume | 169.23 | 176.22 | 166.83 | 194.42 | 173.63 |
Computations Relating to Power Output (More Information) | |||||
Robert LeMassena's Power Computation | 6120 | 7380 | 9324 | 4140 | 6120 |
Same as above plus superheater percentage | 7160 | 8708 | 10,909 | 4844 | 7038 |
Same as above but substitute firebox area for grate area | 32,643 | 37,807 | 44,500 | 21,902 | 32,458 |
Power L1 | 7327 | 8376 | 7855 | 8098 | 6932 |
Power MT | 698.99 | 678.96 | 443.88 | 1008.87 | 649.76 |
Principal Dimensions by Steve Llanso of Sweat House Media | |||||
---|---|---|---|---|---|
Class | GCA | GD | GDA | GE - 1st order | GE - 2nd order |
Locobase ID | 755 | 751 | 756 | 4382 | 761 |
Railroad | South African Railways (SAR) | South African Railways (SAR) | South African Railways (SAR) | South African Railways (SAR) | South African Railways (SAR) |
Country | South Africa | South Africa | South Africa | South Africa | South Africa |
Whyte | 2-6-2+2-6-2 | 2-6-2+2-6-2 | 2-6-2+2-6-2 | 2-8-2+2-8-2 | 2-8-2+2-8-2 |
Number in Class | 38 | 14 | 5 | 6 | 10 |
Road Numbers | 2190-2202,2600-2625 | 2220-2223, 2228-2237 | 2255-2259 | 2260-2265 | 2266-2275 |
Gauge | 3'6" | 3'6" | 3'6" | 3'6" | 3'6" |
Number Built | 38 | 14 | 5 | 6 | 10 |
Builder | Krupp | Beyer, Peacock | Linke-Hofmann | Beyer, Peacock | Beyer, Peacock |
Year | 1928 | 1925 | 1929 | 1925 | 1927 |
Valve Gear | Walschaert | Walschaert | Walschaert | Walschaert | Walschaert |
Locomotive Length and Weight | |||||
Driver Wheelbase (ft / m) | 8 / 2.44 | 17 / 5.18 | 17 / 5.18 | 13.25 / 4.04 | 25.50 / 4.04 |
Engine Wheelbase (ft / m) | 35.40 / 10.79 | 35.50 / 11.43 | 37.50 / 11.43 | 22.87 / 6.97 | 22.87 / 6.97 |
Ratio of driving wheelbase to overall engine wheelbase | 0.23 | 0.48 | 0.45 | 0.58 | 1.11 |
Overall Wheelbase (engine & tender) (ft / m) | 56.67 / 17.27 | 58.33 / 17.78 | 58.33 / 17.78 | 70 / 21.34 | 70 / 21.34 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 26,432 / 11,989 | 28,560 / 12,955 | 30,688 / 13,920 | 30,128 / 13,666 | 30,128 / 13,666 |
Weight on Drivers (lbs / kg) | 149,744 / 67,923 | 168,784 / 76,559 | 178,192 / 80,827 | 231,840 / 105,161 | 231,840 / 105,161 |
Engine Weight (lbs / kg) | 236,992 / 107,498 | 255,472 / 115,880 | 268,016 / 121,570 | 332,416 / 150,782 | 332,416 / 150,782 |
Tender Loaded Weight (lbs / kg) | |||||
Total Engine and Tender Weight (lbs / kg) | 236,992 / 107,498 | 255,472 / 115,880 | 268,016 / 121,570 | 332,416 / 150,782 | 332,416 / 150,782 |
Tender Water Capacity (gals / ML) | 3000 / 11.36 | 4560 / 17.27 | 4560 / 17.27 | 5520 / 17.42 | 4600 / 17.42 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 7 / 6.40 | 5.60 / 5.10 | 5.50 / 5 | 9.90 / 9 | 10.10 / 9 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 42 / 21 | 47 / 23.50 | 49 / 24.50 | 48 / 24 | 48 / 24 |
Geometry Relating to Tractive Effort | |||||
Driver Diameter (in / mm) | 42.80 / 1087 | 45.50 / 1156 | 46 / 1168 | 46 / 1168 | 46 / 1168 |
Boiler Pressure (psi / kPa) | 180 / 12.40 | 180 / 12.40 | 180 / 12.40 | 180 / 12.40 | 180 / 12.40 |
High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 23" / 356x584 (4) | 15" x 24" / 381x610 (4) | 15" x 24" / 381x610 (4) | 18" x 24" / 457x610 (4) | 18" x 24" / 457x610 (4) |
Tractive Effort (lbs / kg) | 32,230 / 14619.30 | 36,316 / 16472.68 | 35,922 / 16293.96 | 51,727 / 23463.00 | 51,727 / 23463.00 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.65 | 4.65 | 4.96 | 4.48 | 4.48 |
Heating Ability | |||||
Tubes (number - dia) (in / mm) | 141 - 2" / 51 | 184 - 2" / 51 | 193 - 2" / 51 | 288 - 2" / 51 | 288 - 2" / 51 |
Flues (number - dia) (in / mm) | 24 - 5.5" / 140 | 35 - 5.5" / 140 | 32 - 5.5" / 140 | 36 - 5.5" / 140 | 36 - 5.5" / 140 |
Flue/Tube length (ft / m) | 11.28 / 3.44 | 10.60 / 3.23 | 10.62 / 3.24 | 11.25 / 3.43 | 11.25 / 3.43 |
Firebox Area (sq ft / m2) | 163 / 15.14 | 167 / 15.51 | 181 / 16.82 | 215 / 19.98 | 202 / 18.77 |
Grate Area (sq ft / m2) | 34 / 3.16 | 40.40 / 3.75 | 40 / 3.72 | 52 / 4.83 | 52 / 4.83 |
Evaporative Heating Surface (sq ft / m2) | 1388 / 128.95 | 1677 / 155.80 | 1750 / 162.58 | 2589 / 240.61 | 2576 / 239.41 |
Superheating Surface (sq ft / m2) | 331 / 30.75 | 355 / 32.98 | 370 / 34.37 | 362 / 33.64 | 349 / 32.43 |
Combined Heating Surface (sq ft / m2) | 1719 / 159.70 | 2032 / 188.78 | 2120 / 196.95 | 2951 / 274.25 | 2925 / 271.84 |
Evaporative Heating Surface/Cylinder Volume | 169.36 | 170.82 | 178.25 | 183.13 | 182.21 |
Computations Relating to Power Output (More Information) | |||||
Robert LeMassena's Power Computation | 6120 | 7272 | 7200 | 9360 | 9360 |
Same as above plus superheater percentage | 7283 | 8508 | 8424 | 10,483 | 10,483 |
Same as above but substitute firebox area for grate area | 34,915 | 35,170 | 38,119 | 43,344 | 40,723 |
Power L1 | 8118 | 7935 | 8413 | 6757 | 6567 |
Power MT | 717.11 | 621.87 | 624.52 | 514.03 | 499.58 |
Principal Dimensions by Steve Llanso of Sweat House Media | |||||
---|---|---|---|---|---|
Class | GE - 3rd order | GEA | GF | GG | GH |
Locobase ID | 2907 | 768 | 765 | 750 | 13099 |
Railroad | South African Railways (SAR) | South African Railways (SAR) | South African Railways (SAR) | South African Railways (SAR) | South African Railways (SAR) |
Country | South Africa | South Africa | South Africa | South Africa | South Africa |
Whyte | 2-8-2+2-8-2 | 4-8-2+2-8-4 | 4-6-2+2-6-4 | 2-6-2+2-6-2 | 4-6-2+2-6-4 |
Number in Class | 2 | 50 | 65 | 1 | 2 |
Road Numbers | 2276-2277 | 4001-4050 | 2370-2434 | 2290 | 2320-2321 |
Gauge | 3'6" | 3'6" | 3'6" | 3'6" | 3'6" |
Number Built | 2 | 50 | 65 | 1 | 2 |
Builder | Beyer, Peacock | Beyer, Peacock | several | Beyer, Peacock | Maffei |
Year | 1930 | 1946 | 1928 | 1925 | 1928 |
Valve Gear | Walschaert | Stephenson | Stephenson | Walschaert | Walschaert |
Locomotive Length and Weight | |||||
Driver Wheelbase (ft / m) | 13.25 / 4.04 | 26.75 / 8.15 | 9.50 / 2.90 | 20 / 6.10 | 10.75 / 3.28 |
Engine Wheelbase (ft / m) | 22.92 / 6.99 | 56.67 / 17.27 | 23.58 / 7.19 | 42.70 / 13.01 | 50.33 / 15.34 |
Ratio of driving wheelbase to overall engine wheelbase | 0.58 | 0.47 | 0.40 | 0.47 | 0.21 |
Overall Wheelbase (engine & tender) (ft / m) | 70 / 21.34 | 80.83 / 24.64 | 69.75 / 21.26 | 67.33 / 20.52 | 76.58 / 23.34 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 29,456 / 13,361 | 33,600 / 15,241 | 31,808 / 14,428 | 36,288 / 16,460 | 40,544 / 18,390 |
Weight on Drivers (lbs / kg) | 230,160 / 104,399 | 259,840 / 117,862 | 162,400 / 73,663 | 211,680 / 96,017 | 240,800 / 109,225 |
Engine Weight (lbs / kg) | 331,296 / 150,274 | 415,520 / 188,477 | 326,032 / 147,886 | 330,960 / 150,121 | 413,840 / 187,715 |
Tender Loaded Weight (lbs / kg) | |||||
Total Engine and Tender Weight (lbs / kg) | 331,296 / 150,274 | 415,520 / 188,477 | 326,032 / 147,886 | 330,960 / 150,121 | 413,840 / 187,715 |
Tender Water Capacity (gals / ML) | 4600 / 17.42 | 5600 / 21.21 | 4800 / 18.18 | 4600 / 17.42 | 7200 / 27.27 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 9.90 / 9 | 11 / 10 | 11 / 10 | 10 / 9.10 | 14.90 / 13.50 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 48 / 24 | 54 / 27 | 45 / 22.50 | 59 / 29.50 | 67 / 33.50 |
Geometry Relating to Tractive Effort | |||||
Driver Diameter (in / mm) | 46 / 1168 | 48 / 1219 | 54 / 1372 | 57 / 1448 | 60 / 1524 |
Boiler Pressure (psi / kPa) | 180 / 12.40 | 200 / 13.80 | 185 / 12.80 | 180 / 12.40 | 180 / 12.40 |
High Pressure Cylinders (dia x stroke) (in / mm) | 19" x 24" / 483x610 (4) | 18.5" x 26" / 470x660 (4) | 16" x 26" / 406x660 (4) | 18" x 26" / 457x660 (4) | 19.5" x 26" / 495x660 (4) |
Tractive Effort (lbs / kg) | 57,634 / 26142.37 | 63,031 / 28590.41 | 38,765 / 17583.53 | 45,224 / 20513.29 | 50,421 / 22870.61 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.99 | 4.12 | 4.19 | 4.68 | 4.78 |
Heating Ability | |||||
Tubes (number - dia) (in / mm) | 288 - 2" / 51 | 282 - 2" / 51 | 234 - 2" / 51 | 288 - 2" / 51 | 195 - 2.25" / 57 |
Flues (number - dia) (in / mm) | 36 - 5.5" / 140 | 36 - 5.5" / 140 | 36 - 5.5" / 140 | 36 - 5.5" / 140 | 43 - 5.5" / 140 |
Flue/Tube length (ft / m) | 11.25 / 3.43 | 11.72 / 3.57 | 11.72 / 3.57 | 11.72 / 3.57 | 13.67 / 4.17 |
Firebox Area (sq ft / m2) | 229 / 21.27 | 212 / 19.70 | 199 / 18.49 | 219 / 20.35 | 239 / 22.20 |
Grate Area (sq ft / m2) | 52 / 4.83 | 51.30 / 4.77 | 44 / 4.09 | 52 / 4.83 | 60 / 5.57 |
Evaporative Heating Surface (sq ft / m2) | 2603 / 241.83 | 2540 / 235.97 | 2242 / 208.36 | 2589 / 240.53 | 2655 / 246.66 |
Superheating Surface (sq ft / m2) | 364 / 33.82 | 470 / 43.66 | 473 / 43.96 | 362 / 33.63 | 665 / 61.78 |
Combined Heating Surface (sq ft / m2) | 2967 / 275.65 | 3010 / 279.63 | 2715 / 252.32 | 2951 / 274.16 | 3320 / 308.44 |
Evaporative Heating Surface/Cylinder Volume | 165.25 | 157.00 | 185.27 | 169.05 | 147.71 |
Computations Relating to Power Output (More Information) | |||||
Robert LeMassena's Power Computation | 9360 | 10,260 | 8140 | 9360 | 10,800 |
Same as above plus superheater percentage | 10,483 | 11,902 | 9524 | 10,483 | 12,960 |
Same as above but substitute firebox area for grate area | 46,166 | 49,184 | 43,074 | 44,150 | 51,624 |
Power L1 | 6154 | 7744 | 10,311 | 7751 | 9849 |
Power MT | 471.58 | 525.63 | 839.85 | 484.35 | 541.03 |
Principal Dimensions by Steve Llanso of Sweat House Media | |||||
---|---|---|---|---|---|
Class | GL | GM | GMA/GMAM | GO | HF |
Locobase ID | 766 | 767 | 769 | 771 | 13097 |
Railroad | South African Railways (SAR) | South African Railways (SAR) | South African Railways (SAR) | South African Railways (SAR) | South African Railways (SAR) |
Country | South Africa | South Africa | South Africa | South Africa | South Africa |
Whyte | 4-8-2+2-8-4 | 4-8-2+2-8-4 | 4-8-2+2-8-4 | 4-8-2+2-8-4 | 2-8-2+2-8-2 |
Number in Class | 8 | 16 | 120 | 25 | 11 |
Road Numbers | 2350-2357 | 2291-2306 | 4051-4170 | 2572-2596 | 1380-1390 |
Gauge | 3'6" | 3'6" | 3'6" | 3'6" | 3'6" |
Number Built | 8 | 16 | 120 | 25 | 11 |
Builder | Beyer, Peacock | Beyer, Peacock | several | Henschel & Sohn | Henschel & Sohn |
Year | 1930 | 1938 | 1952 | 1954 | 1927 |
Valve Gear | Stephenson | Walschaert | Walschaert | Walschaert | Walschaert |
Locomotive Length and Weight | |||||
Driver Wheelbase (ft / m) | 18 / 5.49 | 28.83 / 8.79 | 28.83 / 8.79 | 28.83 / 4.39 | 12.75 / 3.89 |
Engine Wheelbase (ft / m) | 55.33 / 16.86 | 59.67 / 18.19 | 86.33 / 26.31 | 60.67 / 9.24 | 22.87 / 6.97 |
Ratio of driving wheelbase to overall engine wheelbase | 0.33 | 0.48 | 0.33 | 0.48 | 0.56 |
Overall Wheelbase (engine & tender) (ft / m) | 83.58 / 25.48 | 86.33 / 26.31 | 86.32 / 26.31 | 86.33 / 26.31 | 69.83 / 21.28 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 40,992 / 18,594 | 33,600 / 15,241 | 35,616 / 16,155 | 30,016 / 13,615 | 33,600 / 15,241 |
Weight on Drivers (lbs / kg) | 324,464 / 147,175 | 257,824 / 116,947 | 273,615 / 124,110 | 245,504 / 111,359 | 230,272 / 104,450 |
Engine Weight (lbs / kg) | 472,864 / 214,488 | 390,432 / 177,097 | 428,736 / 194,472 | 392,448 / 178,012 | 336,112 / 152,458 |
Tender Loaded Weight (lbs / kg) | |||||
Total Engine and Tender Weight (lbs / kg) | 472,864 / 214,488 | 390,432 / 177,097 | 428,736 / 194,472 | 392,448 / 178,012 | 336,112 / 152,458 |
Tender Water Capacity (gals / ML) | 8400 / 31.82 | 1920 / 7.27 | 2099 / 7.95 | 5520 / 20.91 | |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 13.20 / 12 | 11 / 10 | 15.40 / 14 | 12.10 / 11 | 7.70 / 7 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 68 / 34 | 54 / 27 | 57 / 28.50 | 51 / 25.50 | 48 / 24 |
Geometry Relating to Tractive Effort | |||||
Driver Diameter (in / mm) | 48 / 1219 | 54 / 1372 | 54 / 1372 | 54 / 1372 | 46 / 1168 |
Boiler Pressure (psi / kPa) | 200 / 13.80 | 200 / 13.80 | 200.20 / 13.80 | 200 / 13.80 | 180 / 12.40 |
High Pressure Cylinders (dia x stroke) (in / mm) | 22" x 26" / 559x660 (4) | 20.5" x 26" / 521x660 (4) | 20.51" x 25.98" / 521x660 (4) | 18.5" x 26" / 470x660 (4) | 18" x 24" / 457x610 (4) |
Tractive Effort (lbs / kg) | 89,137 / 40431.91 | 68,796 / 31205.38 | 68,879 / 31243.03 | 56,028 / 25413.90 | 51,727 / 23463.00 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.64 | 3.75 | 3.97 | 4.38 | 4.45 |
Heating Ability | |||||
Tubes (number - dia) (in / mm) | 263 - 2" / 51 | 255 - 2" / 51 | 282 - 2.008" / 51 | 241 - 2" / 51 | 169 - 2" / 51 |
Flues (number - dia) (in / mm) | 50 - 5.5" / 140 | 50 - 5.5" / 140 | 50 - 5.512" / 140 | 36 - 5.5" / 140 | 34 - 5.5" / 140 |
Flue/Tube length (ft / m) | 14.54 / 4.43 | 13.54 / 4.13 | 13.55 / 4.13 | 13.54 / 4.13 | 15 / 4.57 |
Firebox Area (sq ft / m2) | 347 / 32.24 | 281 / 26.11 | 237.24 / 22.04 | 226 / 21 | 209 / 19.42 |
Grate Area (sq ft / m2) | 75 / 6.97 | 64 / 5.95 | 63.18 / 5.87 | 56.60 / 5.26 | 53 / 4.93 |
Evaporative Heating Surface (sq ft / m2) | 3396 / 315.50 | 3066 / 284.84 | 3211 / 298.31 | 2625 / 243.96 | 2271 / 211.06 |
Superheating Surface (sq ft / m2) | 835 / 77.57 | 778 / 72.28 | 747 / 69.40 | 546 / 50.74 | 598 / 55.58 |
Combined Heating Surface (sq ft / m2) | 4231 / 393.07 | 3844 / 357.12 | 3958 / 367.71 | 3171 / 294.70 | 2869 / 266.64 |
Evaporative Heating Surface/Cylinder Volume | 148.44 | 154.34 | 161.61 | 162.26 | 160.64 |
Computations Relating to Power Output (More Information) | |||||
Robert LeMassena's Power Computation | 15,000 | 12,800 | 12,649 | 11,320 | 9540 |
Same as above plus superheater percentage | 18,000 | 15,360 | 15,052 | 13,244 | 11,543 |
Same as above but substitute firebox area for grate area | 83,280 | 67,440 | 56,520 | 52,884 | 45,520 |
Power L1 | 8844 | 10,396 | 10,084 | 9645 | 8491 |
Power MT | 480.74 | 711.16 | 650.00 | 692.89 | 650.34 |
Principal Dimensions by Steve Llanso of Sweat House Media | |||||
---|---|---|---|---|---|
Class | NG.G 16 | NG.G 16 | NG.G 16 | NG.G11 | NG.G11 |
Locobase ID | 703 | 759 | 760 | 744 | 746 |
Railroad | South African Railways (SAR) | South African Railways (SAR) | South African Railways (SAR) | South African Railways (SAR) | South African Railways (SAR) |
Country | South Africa | South Africa | South Africa | South Africa | South Africa |
Whyte | 2-6-2+2-6-2 | 2-6-2+2-6-2 | 2-6-2+2-6-2 | 2-6-0+0-6-2 | 2-6-0+0-6-2 |
Number in Class | 7 | 18 | 8 | 3 | 2 |
Road Numbers | TC6-TC12/NGG 137-NGG143 | NG85-88, 109-116, 125-131 | NG149-NG156 | NG51-NG53 | NG54-NG55 |
Gauge | 2' | 2' | 2' | 2' | 2' |
Number Built | 7 | 18 | 8 | 3 | 2 |
Builder | Beyer, Peacock | several | Hunslet Taylor, Johannesburg | Beyer, Peacock | Beyer, Peacock |
Year | 1958 | 1937 | 1967 | 1920 | 1925 |
Valve Gear | Walschaert | Walschaert | Walschaert | Walschaert | Walschaert |
Locomotive Length and Weight | |||||
Driver Wheelbase (ft / m) | 12.50 / 3.81 | 12.50 / 3.81 | 12.50 / 3.81 | 11.50 / 1.75 | 11.50 / 3.51 |
Engine Wheelbase (ft / m) | 27.75 / 8.46 | 27.75 / 8.46 | 27.75 / 8.46 | 39.75 / 12.12 | 20.50 / 6.25 |
Ratio of driving wheelbase to overall engine wheelbase | 0.45 | 0.45 | 0.45 | 0.29 | 0.56 |
Overall Wheelbase (engine & tender) (ft / m) | 43.25 / 13.18 | 43.25 / 13.18 | 43.25 / 13.18 | 46 / 14.02 | 46 / 14.02 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 15,456 / 7011 | 15,546 / 7052 | 15,344 / 6960 | 13,860 / 6287 | 14,762 / 6696 |
Weight on Drivers (lbs / kg) | 90,692 / 41,137 | 87,696 / 39,778 | 80,976 / 36,730 | 84,464 / 38,312 | |
Engine Weight (lbs / kg) | 139,328 / 63,198 | 132,384 / 60,048 | 139,328 / 63,198 | 100,240 / 45,468 | 108,976 / 49,431 |
Tender Loaded Weight (lbs / kg) | |||||
Total Engine and Tender Weight (lbs / kg) | 139,328 / 63,198 | 132,384 / 60,048 | 139,328 / 63,198 | 100,240 / 45,468 | 108,976 / 49,431 |
Tender Water Capacity (gals / ML) | 2190 / 8.30 | 1825 / 6.91 | 1590 / 6.02 | 1620 / 6.14 | |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 6.94 / 6.30 | 4.40 / 4 | 6.60 / 6 | 2.80 / 3 | |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 25 / 12.50 | 24 / 12 | 22 / 11 | 23 / 11.50 | |
Geometry Relating to Tractive Effort | |||||
Driver Diameter (in / mm) | 33 / 838 | 33 / 838 | 33 / 838 | 30 / 762 | 30 / 762 |
Boiler Pressure (psi / kPa) | 180 / 12.40 | 180 / 12.40 | 180 / 12.40 | 180 / 12.40 | 180 / 12.40 |
High Pressure Cylinders (dia x stroke) (in / mm) | 12" x 16" / 305x406 (4) | 12" x 16" / 305x406 (4) | 12" x 16" / 305x406 (4) | 10.5" x 16" / 267x406 (4) | 10.5" x 16" / 267x406 (4) |
Tractive Effort (lbs / kg) | 21,364 / 9690.56 | 21,364 / 9690.56 | 21,364 / 9690.56 | 17,993 / 8161.50 | 17,993 / 8161.50 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.25 | 4.10 | 4.50 | 4.69 | |
Heating Ability | |||||
Tubes (number - dia) (in / mm) | 152 - 1.75" / 44 | 152 - 1.75" / 44 | 152 - 1.75" / 44 | 211 - 1.75" / 44 | 115 - 1.75" / 44 |
Flues (number - dia) (in / mm) | 15 - 5.5" / 140 | 15 - 5.5" / 140 | 15 - 5.5" / 140 | 13 - 5.5" / 140 | |
Flue/Tube length (ft / m) | 9.26 / 2.82 | 9.31 / 2.84 | 9.33 / 2.84 | 9.33 / 2.84 | 9.25 / 2.82 |
Firebox Area (sq ft / m2) | 82.10 / 7.63 | 82.10 / 7.63 | 75 / 6.97 | 81 / 7.53 | 80.60 / 7.49 |
Grate Area (sq ft / m2) | 19.50 / 1.81 | 19.50 / 1.81 | 19.20 / 1.78 | 19.30 / 1.79 | 19.50 / 1.81 |
Evaporative Heating Surface (sq ft / m2) | 921 / 85.56 | 921 / 85.56 | 920 / 85.47 | 980 / 91.04 | 742 / 68.93 |
Superheating Surface (sq ft / m2) | 149 / 13.84 | 149 / 13.84 | 147 / 13.66 | 142 / 13.19 | |
Combined Heating Surface (sq ft / m2) | 1070 / 99.40 | 1070 / 99.40 | 1067 / 99.13 | 980 / 91.04 | 884 / 82.12 |
Evaporative Heating Surface/Cylinder Volume | 219.87 | 219.87 | 219.63 | 305.58 | 231.37 |
Computations Relating to Power Output (More Information) | |||||
Robert LeMassena's Power Computation | 3510 | 3510 | 3456 | 3474 | 3510 |
Same as above plus superheater percentage | 4001 | 4001 | 3940 | 3474 | 4072 |
Same as above but substitute firebox area for grate area | 16,847 | 16,847 | 15,390 | 14,580 | 16,829 |
Power L1 | 6316 | 6316 | 6188 | 3887 | 6800 |
Power MT | 921.21 | 952.68 | 634.96 | 1064.93 |
Principal Dimensions by Steve Llanso of Sweat House Media | |||||
---|---|---|---|---|---|
Class | NG.G12 | NG.G13 | NG.G14 | U | unknown |
Locobase ID | 754 | 753 | 757 | 13098 | 762 |
Railroad | South African Railways (SAR) | South African Railways (SAR) | South African Railways (SAR) | South African Railways (SAR) | South African Railways (SAR) |
Country | South Africa | South Africa | South Africa | South Africa | South Africa |
Whyte | 2-6-2+2-6-2 | 2-6-2+2-6-2 | 2-6-2+2-6-2 | 2-6-2+2-6-2 | 4-6-2+2-6-4 |
Number in Class | 2 | 12 | 1 | 10 | |
Road Numbers | NG56-NG57 | NG58-60, 49-50, 77-83 | NG84 | 1370-1379 | |
Gauge | 2' | 2' | 2' | 3'6" | 3'6" |
Number Built | 2 | 12 | 1 | 10 | |
Builder | Franco-Belge, La Croyere | Hanomag | Hanomag | Maffei | Beyer, Peacock |
Year | 1927 | 1927 | 1930 | 1927 | 1925 |
Valve Gear | Walschaert | Walschaert | Walschaert | Walschaert | Walschaert |
Locomotive Length and Weight | |||||
Driver Wheelbase (ft / m) | 11.50 / 3.51 | 12.50 / 3.81 | 11.50 / 3.51 | 18 / 5.49 | 22.86 / 6.97 |
Engine Wheelbase (ft / m) | 12.62 / 3.85 | 26.33 / 8.03 | 40.50 / 12.34 | 33.33 / 10.16 | 70 / 21.34 |
Ratio of driving wheelbase to overall engine wheelbase | 0.91 | 0.47 | 0.28 | 0.54 | 0.33 |
Overall Wheelbase (engine & tender) (ft / m) | 40 / 12.19 | 42.75 / 13.03 | 40.50 / 12.34 | 66.92 / 20.40 | |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 8400 / 3810 | 15,848 / 7189 | 8960 / 4064 | 41,664 / 18,898 | |
Weight on Drivers (lbs / kg) | 50,400 / 22,861 | 92,008 / 41,734 | 52,976 / 24,030 | 246,400 / 111,765 | 227,920 / 103,383 |
Engine Weight (lbs / kg) | 80,640 / 36,578 | 138,152 / 62,665 | 84,560 / 38,356 | 369,152 / 167,445 | 323,792 / 146,870 |
Tender Loaded Weight (lbs / kg) | |||||
Total Engine and Tender Weight (lbs / kg) | 80,640 / 36,578 | 138,152 / 62,665 | 84,560 / 38,356 | 369,152 / 167,445 | 323,792 / 146,870 |
Tender Water Capacity (gals / ML) | 1200 / 4.55 | 1825 / 6.91 | 1200 / 4.55 | 6340 / 24.02 | 4600 / 17.42 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2.20 / 2 | 4.40 / 4 | 2.20 / 2 | 16.80 / 15.30 | 10.10 / 9.20 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 14 / 7 | 26 / 13 | 15 / 7.50 | 68 / 34 | 63 / 31.50 |
Geometry Relating to Tractive Effort | |||||
Driver Diameter (in / mm) | 30 / 762 | 32.80 / 833 | 30 / 762 | 48 / 1219 | 45.50 / 1156 |
Boiler Pressure (psi / kPa) | 180 / 12.40 | 180 / 12.40 | 180 / 12.40 | 180 / 12.40 | 180 / 12.40 |
High Pressure Cylinders (dia x stroke) (in / mm) | 8.5" x 16" / 216x406 (4) | 12" x 16" / 305x406 (4) | 9" x 16" / 229x406 (4) | 18.5" x 26" / 470x660 (4) | 18" x 24" / 457x660 (4) |
Tractive Effort (lbs / kg) | 11,791 / 5348.31 | 21,495 / 9749.98 | 13,219 / 5996.04 | 56,728 / 25731.42 | 52,296 / 23721.09 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.27 | 4.28 | 4.01 | 4.34 | 4.36 |
Heating Ability | |||||
Tubes (number - dia) (in / mm) | 73 - 1.75" / 44 | 152 - 1.75" / 44 | 73 - 1.75" / 44 | 170 - 2.25" / 57 | 288 - 2" / 51 |
Flues (number - dia) (in / mm) | 10 - 5.25" / 133 | 15 - 5.5" / 140 | 10 - 5.25" / 133 | 30 - 5.5" / 140 | 36 - 5.5" / 140 |
Flue/Tube length (ft / m) | 8 / 2.44 | 9.31 / 2.84 | 8 / 2.44 | 18.04 / 5.50 | 11.25 / 3.43 |
Firebox Area (sq ft / m2) | 45 / 4.18 | 82.10 / 7.63 | 45 / 4.18 | 220 / 20.44 | 199 / 18.49 |
Grate Area (sq ft / m2) | 10.50 / 0.98 | 19.50 / 1.81 | 10.50 / 0.98 | 60 / 5.57 | 51.60 / 4.79 |
Evaporative Heating Surface (sq ft / m2) | 424 / 39.39 | 921 / 85.56 | 424 / 39.39 | 2806 / 260.69 | 2565 / 238.30 |
Superheating Surface (sq ft / m2) | 98 / 9.10 | 149 / 13.84 | 98 / 9.10 | 633 / 58.81 | 344 / 31.96 |
Combined Heating Surface (sq ft / m2) | 522 / 48.49 | 1070 / 99.40 | 522 / 48.49 | 3439 / 319.50 | 2909 / 270.26 |
Evaporative Heating Surface/Cylinder Volume | 201.74 | 219.87 | 179.95 | 173.45 | 181.44 |
Computations Relating to Power Output (More Information) | |||||
Robert LeMassena's Power Computation | 1890 | 3510 | 1890 | 10,800 | 9288 |
Same as above plus superheater percentage | 2249 | 4001 | 2249 | 12,744 | 10,403 |
Same as above but substitute firebox area for grate area | 9639 | 16,847 | 9639 | 46,728 | 40,118 |
Power L1 | 6556 | 6278 | 5848 | 8548 | 6427 |
Power MT | 1720.65 | 902.57 | 1460.20 | 458.89 | 373.00 |