| South African Class 14A & 14R | |
| Hatnote: | ♠ Class 14A as built with a Belpaire firebox Class 14R rebuilt with a Watson Standard boiler Steel firebox - Copper firebox |
| Powertype: | Steam |
| Designer: | South African Railways (D.A. Hendrie) |
| Builder: | North British Locomotive Company |
| Serialnumber: | 20568-20587, 20822-20842 |
| Buildmodel: | Class 14A |
| Builddate: | 1914 |
| Totalproduction: | 41 |
| Whytetype: | 4-8-2 (Mountain) |
| Uicclass: | 2'D1'h2 |
| Driver: | 2nd coupled axle |
| Leadingdiameter: | NaN0NaN0 |
| Coupleddiameter: | 480NaN0 |
| Trailingdiameter: | 330NaN0 |
| Tenderdiameter: | 340NaN0 |
| Wheelbase: | 56feet |
| Engine Total: | 30feet |
| Leading: | 6feet |
| Coupled: | 12feet |
| Tender Total: | 16feet |
| Tenderbogie: | 4feet |
| Length: | 65feet |
| Height: | ♠ 12feet 12feet |
| Axleload: | ♠ 15sigfig=4NaNsigfig=4 15lt |
| Leadingbogie/Pony: | ♠ 14lt 15lt |
| Coupled 1: | ♠ 14lt 14lt |
| Coupled 2: | ♠ 15sigfig=4NaNsigfig=4 15lt |
| Coupled 3: | ♠ 14lt 15lt |
| Coupled 4: | ♠ 14lt 14lt |
| Trail Bogie/Pony: | ♠ 11lt 10lt |
| Tenderbogieload: | Bogie 1: 27lt Bogie 2: 23lt |
| Tenderaxle: | 13lt |
| Weightondrivers: | ♠ 59lt 60lt |
| Locoweight: | ♠ 85lt 87lt |
| Tenderweight: | 51lt |
| Locotenderweight: | ♠ 136lt 138lt |
| Tendertype: | MP1 (2-axle bogies) MP, MP1, MR, MS, MT, MT1, MT2, MX, MY, MY1 permitted |
| Fueltype: | Coal |
| Fuelcap: | 101NaN1 |
| Watercap: | 4250sigfig=3NaNsigfig=3 |
| Fireboxtype: | ♠ Belpaire - Round-top |
| Firearea: | 37square feet |
| Boiler: | Watson Standard no. 2 |
| Pitch: | ♠ 7feet 8feet |
| Diameterinside: | ♠ 5feet 5feet |
| Lengthinside: | ♠ 190NaN0 19feet 19feet |
| Smalltubediameter: | ♠ 119: NaN0NaN0 87: NaN0NaN0 |
| Largetubediameter: | ♠ 21: NaN0NaN0 30: NaN0NaN0 |
| Boilerpressure: | ♠ 1800NaN0 1900NaN0 |
| Safetyvalvetype: | ♠ Ramsbottom - Pop |
| Totalsurface: | ♠ 2059square feet 2075square feet |
| Tubearea: | ♠ 1909square feet 1933square feet |
| Fireboxarea: | ♠ 150square feet 142square feet |
| Superheaterarea: | ♠ 483square feet 492square feet |
| Generator: | Pyle National turbo |
| Cylindercount: | Two |
| Cylindersize: | 210NaN0 bore 260NaN0 stroke |
| Valvegear: | Walschaerts |
| Valvetype: | Piston |
| Coupling: | Johnston link-and-pin AAR knuckle (1930s) |
| Tractiveeffort: | ♠ 32250lbf @ 75% 37360lbf @ 75% |
| Operator: | South African Railways |
| Operatorclass: | Class 14A & 14R |
| Numinclass: | 41 |
| Fleetnumbers: | 1576-1595, 1901-1921 |
| Deliverydate: | 1914-1915 |
| Firstrundate: | 1914 |
| Notes: | The leading coupled axle had flangeless wheels |
The South African Railways Class 14A 4-8-2 of 1914 was a steam locomotive.
In 1914 and 1915, the South African Railways placed 41 Class 14A steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. It was a lighter version of the Class 14 which had entered service a year earlier.[1]
Following the success of the Class 14, D.A. Hendrie, Chief Mechanical Engineer (CME) of the South African Railways (SAR), used its design as basis for the lighter Class 14A locomotive for use on coastal lines, particularly the Cape Eastern line from East London where the physical conditions were approximately similar to those of the lower sections of the Natal mainline, but the permanent way was not as heavy. This second version of the Class 14 was ordered from the North British Locomotive Company in 1913 and was built in two batches. Twenty were delivered in 1914, numbered in the range from 1576 to 1595, and another 21 in 1914 and 1915, numbered in the range from 1901 to 1921.[1] [2]
Like the Class 14, the Class 14A had piston valves, Walschaerts valve gear, a Belpaire firebox and was superheated, but it had nearly 60NaN0 less boiler diameter than the Class 14 to reduce the axle loading from 16lt to 15sigfig=4NaNsigfig=4. To compensate for the smaller boilers, they were equipped with smaller cylinders with a bore of 210NaN0 instead of 22inches.[1]
The locomotives were erected at the East London workshops. Apart from their boilers and cylinders, the frame and other important components were standard with those of the Class 14, such as the coupled wheels, bogie, Pyle National turbo-generators and headlamps, Hasler speed indicator, sight feed lubricators, Hendrie's steam reversing gear, steam operation for rocking the firegrate, Gresham and Craven injectors, steam brakes and combination vacuum ejectors. It was also delivered with Type MP1 tenders which had a coal capacity of 101NaN1 and a water capacity of 4250sigfig=3NaNsigfig=3. One noticeable visible difference from the Class 14 was the absence of the two large sandboxes on each running board.[1] [3] [4]
During the 1930s, many serving locomotives were reboilered with a standard boiler type designed by then CME A.G. Watson as part of his standardisation policy. Such Watson Standard reboilered locomotives were reclassified by adding an "R" suffix to their classification.[3] [4]
From the mid-1930s, all the Class 14A locomotives except no. 1915 were eventually reboilered with Watson Standard no. 2 boilers. In the process they were also equipped with Watson cabs with their distinctive slanted fronts, compared to the conventional vertical fronts of their original cabs. In spite of still being nearly 31NaN1 lighter after reboilering, they were reclassified to Class 14R along with reboilered Class 14 locomotives instead of to Class 14AR. Even so, they could still be identified as ex Class 14A locomotives by the absence of the big sandboxes on their running boards.[1] [3] [4] [5]
Their original Belpaire boilers were fitted with Ramsbottom safety valves, while the Watson Standard boiler was fitted with Pop safety valves. An obvious difference between an original and a Watson Standard reboilered locomotive is usually a rectangular regulator cover just to the rear of the chimney on the reboilered locomotive. In the case of reboilered Class 14A locomotives, two even more obvious differences are the Watson cab and the absence of the Belpaire firebox hump between the cab and boiler on the reboilered locomotives.[3] [4]
As intended, the Class 14A was placed in service on the East London mainline. Although they were good engines, they were not very successful there and were soon relocated to be shared between the Cape Western system for use between Cape Town and Beaufort West and the Eastern Transvaal system for use on the line to Delagoa Bay out of Pretoria, particularly between Waterval Boven and Komatipoort. The Cape Western's engines later joined the rest of the Class in the Eastern Transvaal. They proved themselves as free steaming locomotives, low on maintenance costs and trouble-free, and therefore popular with crews and fitters alike.[1]
Six were eventually sold into industrial service.
| Number | Works nmr | THF / Private | Leaselend / Owner | Current Location | Outside South Africa | ? | |
|---|---|---|---|---|---|---|---|
| 1576 | Private | Umgeni Steam Railway | Kloofstation (Inchanga) | ||||
| 1701 | Private | Greenside Colliery | Greenside Colliery | ||||
| 1718 | THF | Bloemfontein Locomotive Depot | |||||
| 1733 | THF | Krugersdorp Locomotive Depot | |||||
| 1759 | THF | Bloemfontein Locomotive Depot | |||||
| 1908 | Private | Greenside Colliery | Greenside Colliery |
The main picture shows second order Class 14R no. 1905 at Klerksdorp, Transvaal, on 17 April 1978. The first of the following pictures illustrate the locomotive as built, while the rest show reboilered Class 14R (ex Class 14A) locomotives in service.