| 词条 | Dolgoch (locomotive) |
| 释义 |
|name = Dolgoch |powertype = Steam |image = Dolgoch at Tywyn Wharf - 2006-03-05.jpg |caption = Dolgoch at Tywyn Wharf in 2006 |designer = |builder = Fletcher, Jennings & Co. |serialnumber = 63 |builddate = 1866 |buildmodel = Class Bb |totalproduction = 1 |whytetype = 0-4-0WT |gauge = {{RailGauge|2ft3in|lk=on}} |driverdiameter = {{convert|2|ft|3|in|mm|0|abbr=on}}, formerly {{convert|2|ft|4|in|mm|0|abbr=on}} |wheelbase = {{convert|6|ft|6|in|m|2|abbr=on}} |length = {{convert|17|ft|5|in|m|2|abbr=on}} |locoweight = {{convert|10|LT|ST t}} |watercap = |fuelcap = |boilerpressure = {{convert|150|lbf/in2|MPa|2|abbr=on}} |cylindercount = Two, outside |cylindersize = {{convert|7+5/8|x|16|in|mm|0|abbr=on}} |tractiveeffort = {{convert|4100|lbf|kN|2|abbr=on}} |operator = Talyllyn Railway |fleetnumbers = 2 }} Dolgoch is a narrow gauge 0-4-0 well tank steam locomotive. It was built by Fletcher, Jennings & Co. in 1866 and is one of the oldest locomotives still in active service. It was delivered to the Talyllyn Railway in 1866[1]{{page needed|date=December 2016}} and continues to run on this railway. Dolgoch holds an important place in railway preservation history as it was the only serviceable locomotive on the Talyllyn Railway when it became the first ever preserved railway to be operated by volunteers in 1951, and largely single-handedly kept the railway going during this first season.[2]{{page needed|date=December 2016}} DesignThe design is unusual for a 0-4-0. The well tank engine has a long wheelbase and the driving axle is behind the firebox, which prevents the use of a conventional valve gear layout. Consequently, the Allan valve gear is driven from the leading coupled axle and doubled back to connect to the valve rods. HistoryThe locomotive was renamed "Pretoria" between about 1900 and 1914 in celebration of the relief of the township of Pretoria in South Africa by Lord Roberts during the Boer War. It then reverted to the original name "Dolgoch".[3] For most of the Railway's life, names were painted only on the North side of the locomotives. Polished brass nameplates have only been carried in preservation. In early 1945, Dolgoch was sent to the Atlas Foundry in Shrewsbury to be overhauled. At this time, the railway's only other locomotive Talyllyn was so worn out it could not be safely operated and services on the railway were suspended. Dolgoch returned to service in September 1945, with new displacement cylinder lubricators mounted on each side of the smokebox, a new chimney, and a repaired inner firebox and retubed the boiler.[4] Around 1949, Dolgoch's boiler was patched, and on 26th. August 1949, Dolgoch cracked her frame in an accident, which resulted in her driver being dismissed from the company. Dolgoch was the only operable locomotive from 1945 until 1952, when Edward Thomas was restored for use.[4] Between 1954 and 1963, Dolgoch underwent a major overhaul.[5] In fictionThe fictional Rheneas in The Railway Series by the Rev. W. Awdry was based on this engine.[6] {{clear}}References1. ^Boyd 1988 2. ^Rolt 1953 3. ^Boyd 1988 4. ^1 {{Cite journal |title=Dolgoch, 1945-1950 |first=Dan |last=Quine |author-link=Dan Quine |publisher=Talyllyn Railway |journal=Talyllyn News |date=March 2015}} 5. ^{{cite web |url=https://www.talyllyn.co.uk/locomotives/no-2-dolgoch |publisher=Talyllyn Railway |title=No. 2 ‘Dolgoch’ |access-date = 23 October 2018}} 6. ^{{Cite web|url=https://www.talyllyn.co.uk/about/the-awdry-connection|title=The Awdry Connection|publisher=Talyllyn Railway|accessdate=25 October 2018}} Bibliography{{Commons category|Talyllyn Railway, Dolgoch|Dolgoch}}
6 : Talyllyn Railway locomotives|Individual locomotives of Great Britain|Preserved narrow gauge steam locomotives of Great Britain|0-4-0WT locomotives|Railway locomotives introduced in 1866|Fletcher, Jennings locomotives |
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