词条 | LSWR D15 class | |||||||||||||||||||||||||||||||||||||||||||
释义 |
|powertype = Steam |name = LSWR/SR D15 class[1]{{page needed|date=October 2016}} |image = Byfleet & New Haw geograph-2637612-by-Ben-Brooksbank.jpg |caption = D15 Nº 30467 heads a summer Saturday Lymington Pier to Waterloo express past West Weybridge station |designer = Dugald Drummond |builder = LSWR Eastleigh Works |builddate = 1912–13 |totalproduction = 10 |whytetype = 4-4-0 |uicclass = 2'Bh |gauge = {{track gauge|ussg}} |leadingdiameter = {{convert|3|ft|7|in|m|3|abbr=on}} |driverdiameter = {{convert|6|ft|7|in|m|3|abbr=on}} |length = {{convert|63|ft|9|in|m|2|abbr=on}} |locoweight = 59 tons, 15cwt (60.7 tonnes) (orig); 61 tons 11cwt (62.5 tonnes) (superheated version) |tenderweight = 49 tons 0 cwt (49.8 tonnes) (8-wheel) 36 tons 14 cwt (37.3 tonnes) (6-wheel) |superheatertype = Drummond smokebox type, later Eastleigh, later Maunsell |fueltype = Coal |fuelcap = 4 tons (4.1 tonnes) |watercap = {{convert|4500|impgal|l|sigfig=3|abbr=on}} (8-wheel tender) {{convert|3500|impgal|l|sigfig=3|abbr=on}} (6-wheel tender) |cylindercount = Two, inside |cylindersize = {{ubl|New: {{convert|19+1/2|x|26|in|mm|0|abbr=on}}|Rebuilt: {{convert|20|x|26|in|mm|0|abbr=on}}}} |valvegear = Walschaerts |boilerpressure = {{convert|200|lbf/in2|MPa|2|abbr=on|lk=on}} (original version); {{convert|180|lbf/in2|MPa|2|abbr=on}} (smoketube superheater versions.) |tractiveeffort = {{convert|22333|lbf|kN|2|abbr=on|lk=on}} (as built), {{convert|20100|lbf|kN|2|abbr=on}} (after rebuilding) |locale=Great Britain |operator=London and South Western Railway Southern Railway British Railways |operatorclass=LSWR/SR/BR: D15 |powerclass = LSWR/SR: D BR: 3P |withdrawndate=1951–1956 |fleetnumbers=SR & LSWR: 463–472 BR: 30463–30472 |disposition=All scrapped }} The LSWR D15 class 4-4-0 was the last steam locomotive design by Dugald Drummond for the London and South Western Railway in 1912. By 1912, Dugald Drummond had built several classes of unsuccessful 4-6-0 express passenger locomotives. The result of these failures was that when he designed what was to be his last class in 1911, a new 4-4-0 design emerged from Eastleigh Works in February 1912, with what was to be the first of his D15 class. Technical detailsBoilerIn line with the typical Drummond layout, the D15s had a short smokebox with wing plates. The boiler was based on that fitted to the 1905 rebuild of his first double-single, T7 class number 720 of 1897; and had a long firebox with a sloping grate. This resulted in the boiler being pitched higher than usual in order to allow clearance over the trailing axle. Water feedAn exhaust steam feedwater heater was provided and the boiler fed by duplex pumps located on the frames, between the coupled wheels. TendersThe class was initially given the "intermediate" type of eight-wheel, double bogie tender with inside bogie frames carrying 4 tons (4.06 tonnes) of coal and 4,500 gallons (20.5m3), due to the lack of water troughs on the line. By 1923, the eight-wheeled tenders had been replaced by six wheeled 3,500 gallon (15.9m3) versions transferred from K10 and L11 locomotives. SuperheatersAfter Drummond's death, Robert Urie, his successor, fitted the class with Eastleigh superheaters. These had a very small superheating surface so they were replaced by Maunsell superheaters, when Richard Maunsell was appointed Chief Mechanical Engineer of the Southern Railway after the grouping of 1923. Construction history
Operational detailsContrary to Drummond's previous 4-6-0 designs, the D15s performed exceptionally well and were put to work on trains to Bournemouth, where many drivers noted their superior operational characteristics when compared to the T14 class 4-6-0s. This was due to a marked reduction in coal, water and oil consumption, and easier maintenance. However, with the succession of Urie, no further D15s were constructed, as he preferred to concentrate on 4-6-0 designs. These successful locomotives worked, in the main, out of Waterloo and prior to electrification had a virtual monopoly of the Portsmouth expresses. Until the advent of the Bulleid Light Pacifics, a D15 was usually to be found working the Brighton to Plymouth service. Number 468 differed from the rest of the class in that it had the safety valves mounted on the firebox, with Urie N15 style dome and safety valve casings, whilst the others had Drummond direct-loaded safety valves on their domes. As built, number 463 was fitted with a hooter rather than a whistle, which it kept until the Second World War. The class continued into British Railways service in 1948 but were gradually withdrawn in the early 1950s. This meant that none survived to be preserved. Accidents and incidents
Livery and numberingLSWR and SouthernUnder the LSWR, the D15s were outshopped in the LSWR Passenger Sage Green livery with purple-brown edging, creating panels of green.[1]{{page needed|date=October 2016}} This was further lined in white and black with 'LSWR' in gilt on the tender tank sides. They were numbered 463–472 in a continuous block. When transferred to Southern Railway ownership after 1923, the locomotives carried Richard Maunsell's darker version of the LSWR livery.[3]{{page needed|date=October 2016}} The LSWR standard gilt lettering was changed to yellow with 'Southern' on the water tank sides. The locomotives also featured black and white lining.[4] Post-1948 (nationalisation)Livery after Nationalisation was initially Southern freight livery with 'British Railways' on the tender, and an 'S' prefix on the number. The class was subsequently outshopped in BR Mixed Traffic Black with red and white lining, with the BR crest on the tender.[5]{{page needed|date=October 2016}} Locomotive numbering was per BR standard practice, with all 10 locomotives passing into British Railways ownership in 1948.[5]{{page needed|date=October 2016}} BR numbers were 30463-30472.[6]
ReferencesNotes1. ^1 Bradley, D. L. (1986). 2. ^Bishop, Bill (1984) p. 53. 3. ^Swift, Peter (2006). 4. ^Haresnape & Rowledge (1982). p. 91. 5. ^1 Longworth, Hugh (2005). 6. ^Ian Allan ABC of British Railways Locomotives, 1949 edition, part 2, p. 12. Bibliography{{refbegin}}
5 : London and South Western Railway locomotives|4-4-0 locomotives|Railway locomotives introduced in 1912|Scrapped locomotives|Standard gauge steam locomotives of Great Britain |
|||||||||||||||||||||||||||||||||||||||||||
随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识,基本涵盖了大多数领域的百科知识,是一部内容自由、开放的电子版国际百科全书。