{{Short description|1905 design of steam locomotive}} {{About|one of two different Natal Government Railways locomotive types to be designated "Class A"|the other|South African Class 2C 4-6-2}} {{Use dmy dates|date=March 2025}} {{Use South African English|date=October 2013}} {{Infobox locomotive | name = NGR Class A 4-6-2 1905<br>South African Class 2 4-6-2 | image = SAR Klasse 2.jpg | alt = | caption = NGR Class A no. 326, SAR Class 2 no. 763 | hatnote = | powertype = Steam | designer = [[Natal Government Railways]]<br>(D.A. Hendrie) | builder = [[North British Locomotive Company]] | ordernumber = | serialnumber = 16192-16193 | buildmodel = NGR Hendrie A | builddate = 1904 | totalproduction = 2 | rebuilder = | rebuilddate = | numberrebuilt = | whytetype = [[4-6-2]] (Pacific) | uicclass = 2'C1'n2 | driver = 2nd coupled axle | gauge = {{Track gauge|Cape|allk=on}} | leadingdiameter = {{convert|28+1/2|in|mm|0|abbr=on}} | coupleddiameter = {{convert|51|in|mm|0|abbr=on}} | trailingdiameter = {{convert|30|in|mm|0|abbr=on}} | tenderdiameter = {{convert|30|in|mm|0|abbr=on}} | minimumcurve = | wheelbase = {{convert|51|ft|1+3/8|in|mm|0|abbr=on}} | engine total = {{convert|27|ft|10|in|mm|0|abbr=on}} | leading = {{convert|6|ft|mm|0|abbr=on}} | coupled = {{convert|9|ft|4|in|mm|0|abbr=on}} | trailing = | tender total = {{convert|15|ft|6|in|mm|0|abbr=on}} | tenderbogie = {{convert|4|ft|6|in|mm|0|abbr=on}} | pivotcentres = | wheelspacing = | length = | over couplers = {{convert|58|ft|4+1/8|in|mm|0|abbr=on}} | over bufferbeams = | width = | height = {{convert|12|ft|6|in|mm|0|abbr=on}} | frametype = [[Locomotive frame#Plate frames|Plate]] | axleload = {{convert|15|lt|kg|sigfig=4|abbr=on}} | leadingbogie/pony= {{convert|11|lt|15|lcwt|kg|sigfig=4|abbr=on}} | coupled all = | coupled 1 = {{convert|14|lt|kg|sigfig=4|abbr=on}} | coupled 2 = {{convert|15|lt|kg|sigfig=4|abbr=on}} | coupled 3 = {{convert|14|lt|15|lcwt|kg|sigfig=4|abbr=on}} | coupled 4 = | coupled 5 = | coupled 6 = | coupled 7 = | coupled 8 = | trail bogie/pony = {{convert|10|lt|16|lcwt|kg|sigfig=4|abbr=on}} | tenderbogieload = '''Bogie 1:''' {{convert|18|lt|18|lcwt|kg|sigfig=4|abbr=on}}<br>'''Bogie 2:''' {{convert|19|lt|1|lcwt|kg|sigfig=4|abbr=on}} | tenderaxle = {{convert|9|lt|10|lcwt|2|qtr|kg|sigfig=4|abbr=on}} | weightondrivers = {{convert|43|lt|15|lcwt|kg|sigfig=4|abbr=on}} | locoweight = {{convert|66|lt|6|lcwt|kg|sigfig=4|abbr=on}} | tenderweight = {{convert|37|lt|19|lcwt|kg|sigfig=4|abbr=on}} | locotenderweight = {{convert|104|lt|5|lcwt|kg|sigfig=4|abbr=on}} | tendertype = [[South African type SH tender|SH (2-axle bogies)]]<br>SH, [[South African type SK tender|SK]] permitted | fueltype = Coal | fuelcap = {{convert|6|lt|t|1|abbr=on}} | watercap = {{convert|3225|impgal|L|sigfig=3|abbr=on}} | tendercap = | sandcap = | fireboxtype = [[Belpaire firebox|Belpaire]] | firearea = {{convert|28|sqft|m2|abbr=on}} | boiler = | pitch = {{convert|7|ft|3|in|mm|0|abbr=on}} | boilertype = | diameterinside = {{convert|5|ft|3/4|in|mm|0|abbr=on}} | lengthinside = {{convert|16|ft|4+3/4|in|mm|0|abbr=on}} | smalltubediameter= '''246:''' {{convert|2|in|mm|0|abbr=on}} | largetubediameter= | boilerpressure = {{convert|180|psi|kPa|0|abbr=on}} | safetyvalvetype = [[Safety valve#Ramsbottom safety valves|Ramsbottom]] | feedwaterheater = | totalsurface = {{convert|2231|sqft|m2|abbr=on}} | tubearea = {{convert|2112|sqft|m2|abbr=on}} | fluearea = | tubesandflues = | fireboxarea = {{convert|119|sqft|m2|abbr=on}} | superheatertype = | superheaterarea = | cylindercount = Two | cylindersize = {{convert|19|in|mm|0|abbr=on}} bore<br>{{convert|24|in|mm|0|abbr=on}} stroke | frontcylindersize= | rearcylindersize = | hpcylindersize = | lpcylindersize = | valvegear = [[Stephenson valve gear|Stephenson]] | valvetype = [[Slide valve#Balanced slide valve|Balanced slide]] | valvetravel = | valvelap = | valvelead = | transmission = | trainheating = | locobrakes = | trainbrakes = | safety = | coupling = [[Railway coupling#Johnston coupler|Johnston link-and-pin]]<br>[[Janney coupler|AAR knuckle]] (1930s) | maxspeed = | poweroutput = | tractiveeffort = {{convert|22940|lbf|kN|abbr=on}} @ 75% | factorofadhesion = | locobrakeforce = | operator = Natal Government Railways<br>South African Railways | operatorclass = NGR Class A<br>SAR Class 2 | powerclass = | numinclass = 2 | fleetnumbers = NGR 325–326<br>SAR 762–763 | officialname = | nicknames = ''Hendrie A'' | axleloadclass = | locale = | deliverydate = 1905 | firstrundate = 1905 | lastrundate = | withdrawndate = 1936 | preservedunits = | restoredate = | scrapdate = | currentowner = | disposition = | notes = The 2nd coupled axle had flangeless wheels }}
The '''South African Railways Class 2 {{nowrap|4-6-2}}''' of 1905 was a steam locomotive from the pre-[[Union of South Africa|Union]] era in the [[Colony of Natal]].
In 1905, the [[Natal Government Railways]] placed two Class A steam locomotives with a [[4-6-2|{{nowrap|4-6-2}}]] Pacific type wheel arrangement in service. In 1912, when these locomotives were assimilated into the South African Railways, they were renumbered and designated Class 2.<ref name="Holland 1">{{Holland-Vol 1|pages=101–102}}</ref><ref name="SAR&H Jul 1944">Espitalier, T.J.; Day, W.A.J. (1944). ''The Locomotive in South Africa – A Brief History of Railway Development. Chapter III – Natal Government Railways'' (Continued). South African Railways and Harbours Magazine, July 1944. pp. 505–506.</ref><ref name="SAR Renumber">Classification of S.A.R. Engines with Renumbering Lists, issued by the Chief Mechanical Engineer’s Office, Pretoria, January 1912, pp. 7, 12, 15, 35 (Reprinted in April 1987 by SATS Museum, R.3125-6/9/11-1000)</ref><ref name="Paxton-Bourne">{{Paxton-Bourne|pages=35–36}}</ref>
==Manufacturer== In 1904, orders were placed with the [[North British Locomotive Company]] (NBL) for two {{nowrap|4-6-2}} Pacific type locomotives for the Natal Government Railways (NGR). They were designed by NGR Locomotive Superintendent D.A. Hendrie for passenger traffic on those sections of the mainline between Ladysmith and Charlestown which did not have very severe gradients. When they were delivered and placed in service early in 1905, they were designated the NGR Class A, also commonly known as the Hendrie A, and numbered 325 and 326.<ref name="SAR&H Jul 1944"/><ref name="Paxton-Bourne"/><ref name="NBL">North British Locomotive Company works list, compiled by Austrian locomotive historian Bernhard Schmeiser</ref>
==Characteristics== The boiler of this Class was noted for its free steaming qualities. The engines used saturated steam, had [[Stephenson valve gear]] and were built on plate frames. The cylinders were inclined 1 in 18 and were arranged outside the plate frames, while the balanced slide valves were arranged inside the frames. After these two engines, Hendrie adopted [[Walschaerts valve gear]] and outside valves on all his subsequent locomotive designs for its greater accessibility.<ref name="Holland 1"/><ref name="SAR&H Jul 1944"/><ref name="Paxton-Bourne"/>
[[File:D.A. Hendrie.jpg|thumb|left|150px|D.A. Hendrie]] The locomotives had Belpaire fireboxes with firebar rocking finger grates. To accommodate the wide and deep firebox, Hendrie made use of a bridle casting along the same lines as the one which was first introduced by H.M. Beatty on his [[Cape Government Railways]] (CGR) 6th Class {{nowrap|2-6-2}} of 1903, later the [[South African Class 6Y 2-6-2#Development|{{nowrap|Class 6Y}}]] on the South African Railways (SAR).<ref name="Holland 1"/><ref name="SAR&H Jul 1944"/>
With a bridle casting, the widening of the locomotive frame at the back end was accomplished by uniting the narrow front part of the frame and the wider rear part by the heavy steel casting. This method of widening the frames for the firebox continued on the SAR until the general adoption of bar frames for mainline locomotives by 1927 rendered it no longer necessary.<ref name="Holland 1"/><ref name="SAR&H Jul 1944"/>
==Service==
===Natal Government Railways=== The two locomotives ran their first trials on 31 January and 3 March 1905 respectively. As intended, they were placed in service between [[Ladysmith, KwaZulu-Natal|Ladysmith]] and [[Charlestown, KwaZulu-Natal|Charlestown]] and were shedded at Charlestown. They worked the mail trains on this section for many years.<ref name="Holland 1"/><ref name="SAR&H Jul 1944"/><ref name="Paxton-Bourne"/>
===South African Railways=== When the [[Union of South Africa]] was established on 31 May 1910, the three Colonial government railways (CGR, NGR and [[Central South African Railways]]) were united under a single administration to control and administer the railways, ports and harbours of the Union. Although the South African Railways and Harbours came into existence in 1910, the actual classification and renumbering of all the rolling stock of the three constituent railways were only implemented with effect from 1 January 1912.<ref name="SAR Renumber"/><ref name="SAR History">''The South African Railways – Historical Survey''. Editor George Hart, Publisher Bill Hart, Sponsored by Dorbyl Ltd., Published c. 1978, p. 25.</ref>
In 1912, these two Pacifics were renumbered 762 and 763 and designated {{nowrap|Class 2}} on the SAR.<ref name="SAR Renumber"/><ref name="Paxton-Bourne"/><ref name="Holland 2">{{Holland-Vol 2|page=137}}</ref>
They were later transferred to the Witwatersrand for a short period, after which they worked on the [[Komatipoort]]-[[Waterval Boven]] section until they were withdrawn by 1936.<ref name="Holland 1"/><ref name="Paxton-Bourne"/>
==References== {{Commons category|South African Class 2 (4-6-2)|South African Class 2 4-6-2|position=left}} {{Reflist}} {{Locomotives of Natal}} {{Locomotives of South Africa}} {{Steam locomotive tenders}}
[[Category:Steam locomotives of South Africa|1210]] [[Category:D.A. Hendrie locomotives|1210]] [[Category:4-6-2 locomotives]] [[Category:2′C1′ n2 locomotives]] [[Category:NBL locomotives]] [[Category:Cape gauge railway locomotives]] [[Category:Passenger locomotives]] [[Category:Railway locomotives introduced in 1905]] [[Category:1905 in South Africa]] [[Category:Scrapped locomotives]]