| 词条 | South West African Class Hb | ||
| 释义 |
| name = GSWA Class Hb 0-6-2T South West African Class Hb 0-6-2T | image = Class Hb 0-6-2T no 61.jpg | alt = | caption = No. 61 with optional coal and water tender, c. 1930 | hatnote = | powertype = Steam | designer = Henschel and Son | builder = Henschel and Son | ordernumber = | serialnumber = 7298-7300, 7623-7626, 7740-7745, 8610-8611 | buildmodel = Class Hb | builddate = 1905-1908 | totalproduction = 15 | rebuilder = | rebuilddate = | numberrebuilt = | whytetype = 0-6-2T (Branchliner) | uicclass = C1n2t | driver = 3rd coupled axle | gauge = {{Track gauge|600mm}} narrow | leadingdiameter = | coupleddiameter = {{convert|33+7/8|in|mm|0|abbr=on}} | trailingdiameter = | tenderdiameter = | minimumcurve = | wheelbase = {{convert|13|ft|3+1/2|in|mm|0|abbr=on}} | engine total = | leading = | coupled = {{convert|6|ft|4+3/4|in|mm|0|abbr=on}} | trailing = | tender total = | tenderbogie = | pivotcentres = | wheelspacing = 1-2: {{convert|3|ft|4+1/2|in|mm|0|abbr=on}} 2-3: {{convert|3|ft|5/8|in|mm|0|abbr=on}} | length = | over couplers = {{convert|25|ft|mm|0|abbr=on}} | over bufferbeams= {{convert|22|ft|6+3/4|in|mm|0|abbr=on}} | width = {{convert|7|ft|2+1/2|in|mm|0|abbr=on}} | height = {{convert|10|ft|6|in|mm|0|abbr=on}} | frametype = | axleload = | leadingbogie/pony= | coupled all = | coupled 1 = | coupled 2 = | coupled 3 = | coupled 4 = | coupled 5 = | coupled 6 = | coupled 7 = | coupled 8 = | trail bogie/pony= | tenderbogieload = | tenderaxle = | weightondrivers = {{convert|17|lt|14|lcwt|kg|sigfig=4|abbr=on}} | locoweight = {{convert|22|lt|5|lcwt|kg|sigfig=4|abbr=on}} | tenderweight = | locotenderweight = | tendertype = 2-axle bogies | fueltype = Coal | fuelcap = {{convert|15|lcwt|t|1|abbr=on}} | watercap = {{convert|220|impgal|l|sigfig=3|abbr=on}} | tendercap = | sandcap = | fireboxtype = Round-top | firearea = {{convert|11.2|sqft|m2|abbr=on}} | boiler = | boilertype = | pitch = {{convert|4|ft|7+1/2|in|mm|0|abbr=on}} | diameterinside = | lengthinside = | smalltubediameter= | largetubediameter= | boilerpressure = {{convert|171|psi|kPa|0|abbr=on}} | safetyvalvetype = | feedwaterheater = | totalsurface = | tubearea = | archarea = | fluearea = | tubesandflues = | fireboxarea = | superheatertype = | superheaterarea = | generator = | cylindercount = Two | cylindersize = {{convert|320|mm|in|1|abbr=on}} bore {{convert|450|mm|in|1|abbr=on}} stroke | frontcylindersize= | rearcylindersize = | hpcylindersize = | lpcylindersize = | valvegear = Allan | valvetype = | valvetravel = | valvelap = | valvelead = | transmission = | trainheating = | locobrakes = | trainbrakes = | safety = | coupling = Buffer-and-chains | maxspeed = | poweroutput = | tractiveeffort = {{convert|10263|lbf|kN|abbr=on}} @ 75% | factorofadhesion = | locobrakeforce = | operator = Otavi Mining and Railway Company South African Railways | operatorclass = Class Hb | powerclass = | numinclass = 15 | fleetnumbers = 51-65 | officialname = | nicknames = | axleloadclass = | deliverydate = 1905-1908 | firstrundate = 1905 | lastrundate = | withdrawndate = 1942 | preservedunits = | restoredate = | scrapdate = | currentowner = | disposition = | notes = }} The South West African Class Hb 0-6-2T of 1905 was a narrow gauge steam locomotive from the German South West Africa era. Between 1905 and 1908, the German Administration in German South West Africa acquired fifteen Class Hb tank locomotives with a 0-6-2 wheel arrangement for lease to the Otavi Mining and Railway Company. Six of these locomotives survived to be taken onto the roster of the South African Railways after the First World War.[1][2][3] ManufacturerBy 1905, the rapid progress with the construction of the Otavi Railway called for heavier and more powerful locomotives. Between 1905 and 1908, fifteen {{convert|600|mm|in|1|abbr=off}} narrow gauge 0-6-2 tank and tank-and-tender steam locomotives were built for the German Administration in German South West Africa (GSWA) by Henschel and Son in Germany. They were designated Class Hb and numbered in the range from 51 to 65.[1][3][4] The locomotives were leased to the Otavi Mining and Railway Company, who operated the narrow gauge Otavi Railway which was being constructed across the Namib Desert between Swakopmund and Tsumeb, to augment their mainline locomotive fleet.[1][3] CharacteristicsThe locomotives used Allan valve gear and were equipped with dust covers to protect the motion from wind-blown sand in the Namib Desert. The "Hb" classification identified the locomotive type as the second class to have been built for GSWA by Henschel. They were delivered in four batches.[1][4]
ServicePhotographic evidence show that some of these locomotives were eventually permanently converted to tender engines by removing their side tanks. During the First World War, the former German Colony came under South African administration and the railways in GSWA came under control of the Union Defence Forces. Control of all railway operations in South West Africa (SWA) was passed on from the Military to the Director of Railways in Windhoek on 1 August 1915. On 1 April 1922, all the railway lines and rolling stock in the territory became part of the South African Railways.[1][3] Six of these locomotives, numbers 51, 54, 56, 61, 62 and 65, survived into the SAR era. They retained their German Colonial Hb classification and engine numbers while in SAR service. All but one were scrapped after they were withdrawn from service in 1942. Engine no. 56 has been preserved, coupled to a short period train at the Alte Feste museum in Windhoek.[1][2][3] IllustrationIn the main picture, engine no. 61 is shown with its side tanks still intact and with an optional coal and water tender. References{{Commons category|South African Class Hb (0-6-2)|South West African Class Hb|position=left}}1. ^1 2 3 4 5 {{Paxton-Bourne|page=116}} {{Locomotives of South West Africa}}{{Locomotives of South Africa}}2. ^1 {{Dulez 150|pages=235, 387}} 3. ^1 2 3 4 Espitalier, T.J.; Day, W.A.J. (1947). The Locomotive in South Africa - A Brief History of Railway Development. Chapter VII - South African Railways (Continued). South African Railways and Harbours Magazine, October 1947. p. 859. 4. ^1 2 3 4 5 Henschel-Lieferliste (Henschel & Son works list), compiled by Dietmar Stresow 8 : SWA locomotives|0-6-2 locomotives|C1 locomotives|Henschel locomotives|600 mm gauge railway locomotives|Railway locomotives introduced in 1905|1922 in South Africa|Scrapped locomotives |
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