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| leadingdiameter = | driverdiameter = | trailingdiameter = | minimumcurve = | wheelbase = Total: Engine: coupled total Tender: bogie total | length = | width = | height = | framesize = Plate frame | axleload = | weightondrivers = | locoweight = | tenderweight = | locotenderweight = | tendertype = 2 axle bogies Wheels dia | fueltype = Coal | fuelcap = | lubecap = | coolantcap = | watercap = | tendercap = | sandcap = | consumption = | watercons = | electricsystem = | collectionmethod = | primemover = | rpmrange = | enginetype = | aspiration = | displacement = | alternator = | generator = | tractionmotors = | boiler = int dia int length pitch | boilerpressure = | feedwaterheater = | firearea = | tubearea = 112 tubes ext dia 14 tubes ext dia | fluearea = | tubesandflues = | fireboxarea = | totalsurface = | superheatertype = | superheaterarea = | cylindercount = Two | cylindersize = bore stroke | frontcylindersize= | rearcylindersize = | hpcylindersize = | lpcylindersize = | valvegear = Walschaerts | valvetype = | valvetravel = | valvelap = | valvelead = | transmission = | multipleworking = | maxspeed = | poweroutput = | tractiveeffort = | factorofadhesion = | trainheating = | locobrakes = Air | locobrakeforce = | trainbrakes = Air, as built Air & vacuum, modified | safety = | operator = Otavi Mining and Railway Company South African Railways | operatorclass = Otavi Class Hd SAR Class NG5 | powerclass = | numinclass = 3 | fleetnumbers = SW40-SW42 | officialname = | nicknames = | axleloadclass = | locale = | deliverydate = 1912 | firstrundate = 1912 | lastrundate = | retiredate = | withdrawndate = 1960 | preservedunits = | restoredate = | scrapdate = | currentowner = | disposition = Retired | notes = }} The South West African Class Hd 2-8-2 of 1912 is a narrow gauge steam locomotive from the Deutsch-Südwest-Afrika era. In 1912 the German administration in ''Deutsch-Südwest-Afrika'', now Namibia, acquired three Class Hd locomotives with a 2-8-2 Mikado type wheel arrangement to lease to the Otavi Mining and Railway Company for use on the line from Swakopmund to Karibib. When these locomotives were taken onto the roster of the South African Railways after World War I, they retained their German classification and engine numbers, but with an "SW" prefix to their numbers. When a system of grouping narrow gauge locomotives into classes was eventually introduced by the South African Railways between 1928 and 1930, they were reclassified as Class NG5 along with similar locomotives that were placed in service by the South African Railways in 1922.〔〔South African Railways and Harbours Narrow Gauge Locomotive Diagram Book, 2’0” Gauge, S.A.R. Mechanical Dept. Drawing Office, Pretoria, 28 November 1932〕〔South African Railways and Harbours Locomotive Diagram Book, 2’0” & 3’6” Gauge Steam Locomotives, 15 August 1941, as amended〕 ==Manufacturer== Three narrow gauge 2-8-2 Mikado type steam locomotives were built for the German administration in ''Deutsch-Südwest-Afrika'' (DSWA) by Henschel and Son in Germany in 1912. They were designated Class Hd, numbered in the range from 40 to 42, and leased to the Otavi Mining and Railway Company for use on the section between Swakopmund and Karibib.〔〔Henschel-Lieferliste (Henschel & Son works list), compiled by Dietmar Stresow〕 The German "Hd" classification identified the locomotive type as the fourth class to have been built for DSWA by Henschel.〔 The locomotives were superheated, with Walschaerts valve gear, piston valves and outside plate frames. They were equipped for trains with air brakes, which at the time was not yet used in South Africa. Since they were to be used across the Namib Desert, they were equipped with dust covers to protect the motion. Their leading and trailing carrying wheels were arranged as radial axles to allow for sideways motion of the wheels with respect to the locomotive frame, since the locomotive did not have separate bogie trucks.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「South West African Class Hd」の詳細全文を読む スポンサード リンク
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