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Specifications
Specifications
Configuration:;
• Whyte	4-6-4+4-6-4
Gauge	3 ft 6 in (1,067 mm) Cape gauge
Driver dia.	57 in (1,448 mm)
Axle load	14 long tons 15 cwt (33,000 lb or 15 t)
Adhesive weight	76 long tons 19 cwt (172,400 lb or 78.2 t)
Loco weight	180 long tons 18 cwt (405,200 lb or 183.8 t)
Firebox:
• Grate area	47.5 sq ft (4.41 m2)
Boiler pressure	15th: 180 psi (1.24 MPa); 15A: 200 psi (1.38 MPa)
Heating surface:
• Firebox	212 sq ft (19.7 m2)
• Tubes and flues	2,110 sq ft (196 m2)
Superheater:;
• Heating area	494 sq ft (45.9 m2)
Cylinders	Four
Cylinder size	17.5 in × 26 in (444 mm × 660 mm)

Type and origin
Type and origin
Power type	Steam
Builder	Beyer, Peacock and Company; Société Franco-Belge
Build date	1940–1952
Total produced	74

Rhodesia Railways 15th class
Rhodesia Railways 15th class
	15th class No. 417 arrives at Thomson Junction, Zimbabwe, with a freight train from Victoria Falls
Power type
Type and origin
Power type	Steam
Builder	Beyer, Peacock and Company; Société Franco-Belge
Build date	1940–1952
Total produced	74
Configuration:;
Specifications
Configuration:;
• Whyte	4-6-4+4-6-4
Gauge	3 ft 6 in (1,067 mm) Cape gauge
Driver dia.	57 in (1,448 mm)
Axle load	14 long tons 15 cwt (33,000 lb or 15 t)
Adhesive weight	76 long tons 19 cwt (172,400 lb or 78.2 t)
Loco weight	180 long tons 18 cwt (405,200 lb or 183.8 t)
Firebox:
• Grate area	47.5 sq ft (4.41 m2)
Boiler pressure	15th: 180 psi (1.24 MPa); 15A: 200 psi (1.38 MPa)
Heating surface:
• Firebox	212 sq ft (19.7 m2)
• Tubes and flues	2,110 sq ft (196 m2)
Superheater:;
• Heating area	494 sq ft (45.9 m2)
Cylinders	Four
Cylinder size	17.5 in × 26 in (444 mm × 660 mm)
Tractive effort
Performance figures
Tractive effort	15th: 42,740 lbf (190.1 kN); 15A: 47,490 lbf (211.2 kN)
Operators
Career
Operators	Rhodesia Railways; Zambia Railways; National Railways of Zimbabwe
Class	15th, 15A

The Rhodesia Railways 15th class (later Zambia Railways and National Railways of Zimbabwe 15th classes), was the second-largest class of Garratt locomotives, with 74 locomotives built. Only the Class GMA/GMAM of the South African Railways was more numerous at 120 locomotives.

Development and delivery

The 4-6-4+4-6-4 wheel arrangement is sometimes called a "Double Baltic" or "Double Hudson" Garratt. The Rhodesia Railways (RR) 15th class was one of only two Double Baltic Garratt classes built, the other class of "Double Baltics" being the Sudan Railways 250 class (which RR later bought and classified as their 17th class).

The 15th class were largely based on the RR 16th class 2-8-2+2-8-2 Garratts. A requirement for a locomotive with a larger driving wheel diameter for higher speed train service on the more level parts of the railway led to the design of a new class. Initially a "Double Pacific" (4-6-2+2-6-4) was considered, but after examining the Sudan Railways 250 class (which were built in 1937), the RR settled on a design with the same wheel arrangement and same driver diameter (57 in or 1,448 mm) as the Sudanese Double Baltics.

Initially four locomotives were ordered, and they were numbered 271–274. These Garratts were built with a "semi-streamlined" rounded front bunker (water tank), that would become synonymous with modern Garratt locomotives.

The locomotives proved their worth, with a high availability, achieving 6,200 miles (10,000 km) per month. After World War II, a further 70 locomotives were ordered.

The 1947 batch of ten were delivered with a modified front bunker, and a rounded rear bunker as well (the first four had a standard rectangular rear bunker). The next twenty locomotives had further modifications to the front bunker, while the rear bunker had been modified to increase coal capacity from 10 to 12.5 long tons (10.2 to 12.7 t).

The last forty locomotives were designated as 15A class. While almost identical externally, they had their boiler pressure increased from 180 to 200 psi (1.24 to 1.38 MPa).

Table of 15th class and 15A class orders
Year	Qty	BP Order No.	BP Works No.	RR Class	RR No.	Notes
1940	4	11115	6936–6939	15th	271–274	Renumbered 350–353; withdrawn by 1975
1947	10	11137	7228–7231	15th	275–280, 290–293	Renumbered 354–363
1948	10	11139	7260–7269	15th	364–373
1948–49	10	11144	7270–7279	15th	374–383
1949–50	15	11148	7326–7340	15A	384–398
1950	15	11149	7351–7365	15A	399–413	404 renumbered 424
1952	10	11159	7555–7564	15A	414–423	Subcontracted to Société Franco-Belge (2963–2972)

With the introduction of the 17th class (numbered 271–280) and the 18th class (numbered 281–289), the early members of the class were renumbered to put all of the 15th class into a solid block.

Over the following years there were some swapping of boilers between locomotives of 15th, 15A and 16th classes, as well as exchanges of front bunkers, so it was impossible to say for certain if a particular locomotive is 15th or 15A class (i.e. has a 180 or 200 psi boiler).

Service

The 15th class were Intended for the 500-mile (800 km) long run from Bulawayo to Mafeking, South Africa via Francistown and Gaborone, Bechuanaland (now Botswana) but this was dependent on the strengthening of certain bridges which could not be carried out due to the war. They therefore worked the Salisbury-Gwelo section and proved their value there, so after the war more were ordered. After use on most of the system, as outlined further, they eventually worked in Botswana after 1959 and reached Mafeking in 1966 when Rhodesia Railways took over operation of the whole system. They replaced the 12th class 4-8-2 locomotives previously used.^[1] The 15th class came to dominate the line, to the extent that they became the only type used until the DE2 class diesels were assigned to the Bulawayo–Mafeking trains in 1973.^[2] On these trains, the locomotives were worked almost continuously on the 1000-mile round trip, with two crews, one working, one resting in the caboose.^[2]

The 15th class were also used on the Bulawayo to Salisbury (now Harare), Bulawayo to Victoria Falls, and Gwelo to Malvernia, Mozambique trains. A few were also used in Northern Rhodesia (now Zambia). When Zambia took over the operation of railways in its territory, only a few 15th class locomotives went to Zambia Railways. Consequently there was no wholesale renumbering of the 15th class like there was with the 20th class.

One locomotive that was renumbered was 404. It ran away on a downhill section between Thompson Junction and Dett (now Dete). It derailed and overturned on one of the many curves near Entuba siding, killing its experienced driver Danny Grace. The fireman, Dutch born Gerard Smout and the African coal trimmer were thrown clear of the engine and survived the crash. The locomotive was believed to be jinxed, and so after repair, was renumbered 424. One of its old number plates became a memorial at the derailment site. It was however eventually stolen.^[3]

By June 1975 there were 52 locomotives of the 15th class left in service, all allocated to Bulawayo.^[2]

Rebuilding

In 1978 Rhodesia Railways started a rebuilding program for its steam locomotive fleet. Between 1980 and 1983 the remaining Garratt locomotives were completely overhauled and had some modernisation, including the installation of roller bearings. The work was undertaken by private companies, especially the RESSCO works in Bulawayo.

Thirty-four locomotives of the 15th and 15A classes were rebuilt, but locomotives from the 1940 and 1947 batches were excluded. All were given 200 psi boilers, and so with the 180 psi 15th class effectively dead, the 15A class was renamed the 15th class. These rebuilt locomotives were given names of African wildlife:

Table of names of rebuilt 15th/15A locomotives
NRZ No.	NRZ name	Translation of name
370	Ibhalabhala	Kudu
371	Inkolongwane	Hartebeest^[4]
376	Ingulungundu	Bushpig^[5]
380	Umahelwane	African goshawk
381	Ingwe	Leopard^[6]
382	Iganyana	Jackal
385	Ingwenya	Crocodile
386	Umyelane	Spring hare^[5]
387	Imvubu	Hippopotamus
389	Umziki	Reedbuck
391	Ingugama	Gemsbok
392	Ithaka	Roan Antelope
394	Umzwazwa	Brown hawk^[6]
396	Igogo	Klipspringer
397	Inyathi	Buffalo
398	Isidumuka	Waterbuck
400	Imbila	Rock rabbit or rock hyrax^[4]
402	Impofu	Eland
406	Ikolo	Hornbill
407	Ukhozi	Eagle
409	Inkakha	Pangolin^[7]
410	Inkolomi
414	Ubhejane	Black rhinoceros^[6]
415	Itsheme	Great Bustard
416	Inuga	Porcupine
417	Umathabene	Kestrel
418	Umkhombo	White Rhinoceros
419	Isambane	Ant Bear
420	Indlovu	Elephant
421	Intundla	Giraffe^[8]
422	Inkonkoni	Blue wildebeest
423	Idube	Zebra
424	Isilwane	Lion

Due to the continuing difficult economic situation in Zimbabwe, the rebuilt steam locomotives remained in service longer than originally planned. Only at the turn of the millennium was the end of general steam operation decided. After this time, the locomotives were only used until general repairs became due. The parked locomotives were then used for spare parts, but have not been scrapped.

In 2006 and 2007 ten Garratts underwent minor repairs and were put back into service, although their use was confined to shunting, suburban and special service trains. The ten included four members of the 15th class: numbers 386, 395, 416, and 424.

As of March 1, 2016, numbers 395 and 414 were still in use, either leased to HCC (see below) or held for excursion / charter service.

Hwange Colliery

The Hwange Colliery (formerly Wankie Colliery) acquired a total of five 15th class locomotives from National Railways of Zimbabwe for shunting and working transfers to the NRZ at Thompson Junction. These were numbered 8, 9, 10, 11 and 12 (formerly NRZ 415, 396, 392, 423 and 370 respectively). As of December 1, 2014, all five are now out of service (with 8 and 9 already scrapped) for various boiler and mechanical issues. The Colliery then rented/leased 15th 395 or 414 for alternate months from NRZ. This continued in principle until September 2018 although 14A and 16A Garratt's were also supplied by NRZ. With this arrangement ending it brought to a close the use of daily working steam locomotives on the African continent.

Preserved locomotives

At least four locomotives of the 15th class are currently museum or monument locomotives, including two of the first four of 1940:

No. 350 (formerly No. 271) stands with two other locomotives in Kadoma, Zimbabwe.
No. 352 (formerly No. 273) has been displayed at the Francistown, Botswana, Railway Station since 1976
No. 398 is now stored at Steam Incorporated's site in Paekakariki, near Wellington, New Zealand
No. 401 is at the Railway Museum of Livingstone in Zambia.

There are currently no 15th class locomotives in the Bulawayo Railway Museum.

References

Notes

^ Nock 1970, p. 119
^ ^a ^b ^c Turk 1976, p. 76
^ Turk 1976, p. 78
^ ^a ^b Eatwell 2011a, p. 517
^ ^a ^b Eatwell 2011a, p. 518
^ ^a ^b ^c Eatwell 2011b, p. 591
^ Eatwell 2011b, p. 589
^ Eatwell 2011a, p. 520

Bibliography

Durrant, Durrant (January 1984). Garratt-Lokomotiven der Welt. Birkhäuser Verlag. ISBN 3-7643-1481-8.
Eatwell, David (August 2011a). "Hunting Garratts in Zimbabwe". Continental Modeller. Beer, Seaton, Devon: Peco Publications. pp. 516–521.
Eatwell, David (September 2011b). "Hunting Garratts in Zimbabwe". Continental Modeller. Beer, Seaton, Devon: Peco Publications. pp. 588–591.
Nock, O. S. (1970). Railways at the Zenith of Steam 1920–40. London: Blandford Press. pp. 119, 169. ISBN 0-7137-0515-9.
Turk, Andrew (February 1976). "Garratts Galore". Railway World. Shepperton, Surrey: Ian Allan.

External links

Media related to Rhodesia Railways 15th class at Wikimedia Commons

Railway Museum, Livingston – unofficial web page
Steam Incorporated – official site

External videos
Zimbabwe Steam: Bulawayo - Garratt City #1 - April 1997 A few scenes of Bulawayo in 1997 with Classes 14A, 15A and 16A Garratts at work on various duties around the city, along with shed and workshop scenes. (Time 12:16)

External videos
Zimbabwe Steam: Bulawayo - Garratt City #2 - April 1997 Some morning scenes at Bulawayo Steam Shed in 1997 with 14A, 15A and 16A Garratts leaving the shed. Then we see 15A 417 "Umathebene" hauling a goods train out to Cement and shunting the yard there. (Time 5:38)