Data from Gavin Hamilton's excellent compilation of Garratt data posted at [] (6 September 2005); "'58' Class Locomotive" East African Railways and Harbours Magazine, Volume 3, No. 1 (February 1956), p. 22. Works numbers were 7290-7307 in 1949.
These were post-war Class 57 Mountain Garratts with 1/2" (12.7 mm) larger pistons and more heating surface. Water supplies were divided between the leading and trailing engine modules. The front engine's tank carried 3,600 US gallons and the rear engine module carried an additional 2,880 gallons under and behind the oil tank. Fuel rode only in the rear module.
Data from Gavin Hamilton's excellent compilation of Garratt data posted at [] 6 September 2005); and "'59 class", East African Railways and Harbours Magazine, Volume 2, No 3 (June 1955), p. 89. See also Archie Morrow in the [
], visited November 2002). Works numbers were 7632-7658, 7700-7706 in 1959. Named after mountains in East Africa.
These were among the largest Garratts built for service anywhere, possessing relatively huge grates (even though they were oil-fired). Class 59s ran from Mombasa at sea level to Nairobi, which is more than a mile above sea level. Freight trains totalling 1,200 tons could be pulled on a ruling grade of 1 in 66 (1.5%) behind these behemoths, which ran on a metre gauge and had a track radius of only 290 ft.
Archie Morrow, a transplanted Irish engine driver, wrote of his experiences in East Africa and included this illustrative anecdote: "One Up and Two Down were the upper class express passenger trains that ran daily between Mombasa and Nairobi, both leaving at 1800 and arriving at 0800 after crossing halfway. These two trains were worked by the six senior drivers at Nairobi shed. On one occasion, due to a derailment, Two Down did not arrive in Mombasa in time for the engine to work One Up and we were called in to fill the breach. I felt quite chuffed the next morning rolling into Nairobi on time with thirty five coaches on my drawbar and no complaints of passengers having been thrown out of bed or diners having hot soup in their laps."
The 59s were named for East African mountains, according to [] , they were:
5901 Mount Kenya
5902 Ruwenzori Mountains
5903 Mount Meru
5904 Mount Elgon
5905 Mount Muhavura
5906 Mount Sattima
5907 Mount Kinangop
5908 Mount Loolmalasin
5909 Mount Mgahinga
5910 Mount Hanang
5911 Mount Sekerri
5912 Mount Oldeani
5913 Mount Debasien
5914 Mount Londiani
5915 Mount Mtorwi
5916 Mount Rungwe
5917 Mount Kitumbeine
5918 Mount Gelai
5919 Mount Lengai
5920 Mount Mbeya
5921 Mount Nyiru
5922 Mount Blackett
5923 Mount Longonot
5924 Mount Eburu
5925 Mount Monduli
5926 Mount Kimhandu
5927 Mount Tinderet
5928 Mount Kilimanjaro
5929 Mount Longido
5930 Mount Shengena
5931 Ulguru Mountains
5932 Ol'donyo Sabuk
5933 Mount Suswa
5934 Menengai Crater
Data from Gavin Hamilton's excellent compilation of Garratt data posted at [] . (6 September 2005); and "'60' class", East African Railways and Harbours Magazine, Volume 2, No 4 (August 1955), p. 129.
According to the museum website [] (accessed November 2002), the first 12 locomotives, 6001-1012, were built by Franco-Belge, the balance of the class, 6013-6029, by Beyer Peacock (7659-7666 and 7721-7725). They operated on Tanzania's Central Line between Dar-es-Salaam and Morogorol.
Originally named after various governors of the three colonies:
6001 Sir Geoffrey Archer Umoja
6002 Sir Hesketh Bell
6003 Sir Stewart Symes
6004 Sir Frederick Jackson
6005 Sir Bernard Bourdillon
6006 Sir Harold MacMichael
6007 Sir Mark Young
6008 Sir Wilfred Jackson
6009 Sir Edward Twining
6010 Sir Donald Cameron
6011 Sir William Battershill
6012 Sir Percy Girouard
6013 Sir Henry Belfield
6014 Sir Joseph Byrne
6015 Sir Robert Brooke-Popham
6016 Sir Henry Moore
6017 Sir John Hall
6018 Sir Charles Dundas
6019 Sir Philip Mitchell
6020 Sir Evelyn Baring
6021 Sir William Gowers
6022 Sir Andrew Cohen
6023 Sir Edward Northey
6024 Sir James Haye-Sadler
6025 Sir Henry Colville
6026 Sir Horace Byatt
6027 Sir Gerald Portal
6028 Sir H. H. Johnston
6029 Sir Edward Grigg
At independence, to no-one's surprise, these names were removed.
Principal Dimensions by Steve Llanso of Middle Run Media | |||
---|---|---|---|
Class | 58 | 59 | 60 |
Locobase ID | 4331 | 693 | 692 |
Railroad | East African Railways | East African Railways | East African Railways |
Country | Kenya | Kenya | Kenya |
Whyte | 4-8-4+4-8-4 | 4-8-2+2-8-4 | 4-8-2+2-8-4 |
Number in Class | 18 | 34 | 29 |
Road Numbers | 89-106 | 5901-5934 | 6000-6029 |
Gauge | Metre | Metre | Metre |
Number Built | 18 | 34 | 29 |
Builder | Beyer, Peacock | Beyer, Peacock | several |
Year | 1949 | 1955 | 1954 |
Valve Gear | Walschaert | Walschaert | Walschaert |
Locomotive Length and Weight | |||
Driver Wheelbase (ft / m) | 30 / 9.14 | 30 / 9.14 | 25.83 / 7.87 |
Engine Wheelbase (ft / m) | 70.42 / 21.46 | 92.55 / 28.21 | |
Ratio of driving wheelbase to overall engine wheelbase | 0.43 | 0.32 | |
Overall Wheelbase (engine & tender) (ft / m) | 87.92 / 26.80 | 104.12 / 31.74 | 78.08 / 23.80 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 26,320 / 11,939 | 47,040 / 21,337 | 24,864 / 11,278 |
Weight on Drivers (lbs / kg) | 210,560 / 95,509 | 357,347 / 162,090 | 196,672 / 89,209 |
Engine Weight (lbs / kg) | 417,200 / 189,239 | 563,763 / 255,719 | 342,384 / 155,303 |
Tender Loaded Weight (lbs / kg) | |||
Total Engine and Tender Weight (lbs / kg) | |||
Tender Water Capacity (gals / ML) | 7200 / 27.27 | 10,320 / 39.09 | 5534 / 20.96 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2850 / 10787.30 | 3240 / 12263.40 | 2160 / 8175.60 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 44 / 22 | 74 / 37 | 41 / 20.50 |
Geometry Relating to Tractive Effort | |||
Driver Diameter (in / mm) | 54 / 1372 | 54 / 1372 | 48 / 1219 |
Boiler Pressure (psi / kPa) | 220 / 1520 | 225 / 1550 | 200 / 1380 |
High Pressure Cylinders (dia x stroke) (in / mm) | 16.5" x 26" / 419x660 (4) | 20.5" x 28" / 521x711 (4) | 16" x 24" / 406x610 (4) |
Tractive Effort (lbs / kg) | 49,025 / 22237.39 | 83,350 / 37806.97 | 43,520 / 19740.36 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.29 | 4.29 | 4.52 |
Heating Ability | |||
Tubes (number - dia) (in / mm) | 220 - 1.875" / 48 | 285 - 2" / 51 | 176 - 2" / 51 |
Flues (number - dia) (in / mm) | 38 - 5.25" / 133 | 50 - 5.5" / 140 | 32 - 5.28" / 134 |
Flue/Tube length (ft / m) | 11.92 / 3.63 | 15 | 12.95 / 3.95 |
Firebox Area (sq ft / m2) | 234 / 21.74 | 247 / 22.95 | 170 / 15.79 |
Grate Area (sq ft / m2) | 48.50 / 4.51 | 72 / 6.69 | 48.75 / 4.53 |
Evaporative Heating Surface (sq ft / m2) | 2215 / 205.78 | 3560 / 330.74 | 1925 / 178.84 |
Superheating Surface (sq ft / m2) | 477 / 44.31 | 747 / 69.40 | 370 / 34.37 |
Combined Heating Surface (sq ft / m2) | 2692 / 250.09 | 4307 / 400.14 | 2295 / 213.21 |
Evaporative Heating Surface/Cylinder Volume | 172.12 | 166.41 | 172.33 |
Computations Relating to Power Output (More Information) | |||
Robert LeMassena's Power Computation | 10,670 | 16,200 | 9750 |
Same as above plus superheater percentage | 12,591 | 18,954 | 11,310 |
Same as above but substitute firebox area for grate area | 60,746 | 65,023 | 39,440 |
Power L1 | 11,813 | 10,903 | 8745 |
Power MT | 989.48 | 538.12 | 784.23 |