| 词条 | BR Standard Class 3 2-6-0 | ||||||||||||||||
| 释义 |
|powertype = Steam |name = BR Standard Class 3 2-6-0 |image = Bogside Racecourse 2 railway geograph-2171229-by-Ben-Brooksbank.jpg |imagesize = 300 |caption = 77018 at Bogside Racecourse, 1961. |designer = Robert Riddles |builder = BR Swindon Works |builddate = February – September 1954 |totalproduction = 20 |whytetype = 2-6-0 |uicclass = 1′C h2 |gauge = {{Track gauge|ussg|allk=on}} |leadingdiameter = {{convert|3|ft|0|in|m|3|abbr=on}} |driverdiameter = {{convert|5|ft|3|in|m|3|abbr=on}} |length = {{convert|55|ft|11+1/4|in|m|2|abbr=on}} |width = {{convert|8|ft|5+5/8|in|m|2|abbr=on}} |height = {{convert|13|ft|0|in|m|2|abbr=on}} |axleload = {{convert|16.25|LT|t ST}} |weightondrivers = {{convert|48.50|LT|t ST}} |locoweight = {{convert|57.50|LT|t ST}} |tenderweight = {{convert|42.15|LT|t ST}} |tendertype = BR2A |fueltype = Coal |fuelcap = {{convert|6.00|LT|t ST}} |watercap = {{convert|3500|impgal|abbr=on}} |boiler = BR6 |boilerpressure = {{convert|200|psi|MPa|2|abbr=on}} |firearea = {{convert|20.35|sqft|m2|abbr=on}} |fireboxarea = {{convert|118.42|sqft|m2|abbr=on}} |tubesandflues = {{convert|923.54|sqft|m2|abbr=on}} |superheaterarea = {{convert|184.50|sqft|m2|abbr=on}} |cylindercount = Two, outside |cylindersize = {{convert|17.5|x|26|in|mm|0|abbr=on}} |tractiveeffort = {{convert|21490|lbf|kN|1|abbr=on}} |factorofadhesion = 5.05 |operator = British Railways |powerclass = 3MT |fleetnumbers = 77000–77019 |axleloadclass = Route availability 4 |withdrawndate = 1965–1967 |disposition = All scrapped }} The BR Standard Class 3 2-6-0 was a class of mixed traffic steam locomotive designed by Robert Riddles for British Railways. It was essentially a hybrid design, the chassis being closely based on and sharing a number of parts with the LMS Ivatt Class 4, and having a boiler derived from a GWR No.2 boiler as fitted to the GWR Large Prairie 2-6-2T and 5600 Class 0-6-2T tank engines. Design detailsThe design and construction took place at the ex-GWR Swindon Works, along with the 2-6-2T tank engine version of the class, though some details were designed at Brighton, Derby and Doncaster.[1] Although the boiler shared flanged plates with the GWR No.2 boiler the barrel was shortened by {{frac|5|13|16}} inches and a dome added. Strangely the class did not share the same design of wheels as the Doncaster-designed BR Standard Class 4 2-6-0 (76XXX), which also had {{convert|5|ft|3|in|mm|0|abbr=on}} driving wheels and the same piston stroke, and hence crank-pin throw. In common with a number of the other BR Standard Classes, the chassis design used a number of LMS-designed components including Brake Hanger Brackets, Flexible Stretcher Brackets and Reversing Shaft Brackets. The cylinder covers of engines as built were fitted with "screw-in" type pressure relief valves. From September 1955 revised cylinder covers were introduced for renewals incorporating "bolt-on" type pressure relief valves.[2] Although the chassis had many almost identical parts to the LMS Ivatt Class 4 the motion brackets were derived from the design of those fitted to the LMS Ivatt Class 2 2-6-0 and LMS Ivatt Class 2 2-6-2T. Unlike a number of the larger BR Standards the exhaust steam manifold within the smokebox saddle was a steel fabrication that was part of the welded saddle.[3] In a number of the large BR standards (BR Standard Class 6 and Class 7 engines) the exhaust steam manifold was a steel casting welded into the saddle during manufacture.[4] ServiceOnly 20 were built, numbers 77000–77019, all at Swindon Works. Their operations were mainly restricted to the North Eastern and Scottish Regions, of British Railways, although 77014 ended its days on the Southern Region. Due to their small number, the class were the antithesis of 'standard' engines and it would probably have been better to build more 2-6-0s to the Standard Class 4 and Standard Class 2 designs instead. None has survived to preservation, though some components were saved from scrapyards for use on a project to build a new Standard Class 3 2-6-2T. This class was the last class of steam locomotive on British Railways to remain complete before suffering its first withdrawal.{{citation needed|date=April 2012}} Number 77014 was transferred from Northwich depot on the London Midland Region to Guildford depot on the Southern Region in March 1966; it was withdrawn in July 1967.{{sfnp|Teal|1985|page=74}}{{sfnp|Walford|2003|page=226}}
References1. ^{{cite magazine |magazine=The Railway Magazine |date=June 1954 |pages=418–419 |editor-first=B.W.C. |editor-last=Cooke |publisher=Tothill Press |location=Westminster |number=638 |volume=100 |title=British Railways Standard Class "3" 2-6-0 Locomotives }} 2. ^Rear cylinder cover to BR drawing SL/SW/35 being superseded by SL/SW/666 and front cylinder cover to drawing SL/SW/85 being superseded by SL/SW/667 for renewals from September 1955. 3. ^Confirmed on original BR drawing SL/SW/616 sourced from the NRM 4. ^Confirmed on original BR drawing SL/DE/19620 sourced from the NRM Bibliography
|publisher=Ian Allan |title=ABC of British Railways Locomotives |volume=Part 3 |edition=Winter 1962 |page=175 |ref={{harvid|ABC of British Railways Locomotives|1962:3}} }}
|last=Teal |first=Paul |title=BR Motive Power Allocations 1959-1968 - 1: BR Standards & Austerities |year=1985 |publisher=Ian Allan |location=Shepperton |isbn=0-7110-1540-6 |ref=harv }}
|last=Walford |first=John |editor-last=Taylor |editor-first=R.K. |title=A Detailed History of British Railways Standard Steam Locomotives |volume=Volume Two: The 4-6-0 and 2-6-0 Classes |year=2003 |publisher=RCTS |location=Peterborough |isbn=0-901115-93-2 |ref={{harvid|Walford|2003}} |chapter=Section 5.7.2 Allocation Summary }} External links{{Commons category|BR Standard Class 3 2-6-0|BR Standard Class 3 2-6-0}}
4 : British Railways standard classes|2-6-0 locomotives|Railway locomotives introduced in 1954|Scrapped locomotives |
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