56-685: Devonia may refer to: Devonia was one of the GWR 3031 Class locomotives that were built for and run on the Great Western Railway between 1891 and 1915 Devonia (steamer) , a passenger ferry, formerly named the Scillonian before 2004 Devonia, Tennessee , a town in the USA Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with
112-468: A Belpaire-style rectangular firebox, which due to its greater surface area for evaporation was less prone to foaming and carry over of water to the cylinders. Churchward inherited from Dean a series of parallel cylindrical boilers, but by applying mathematical principles to the flow of boiler water, quickly improved the flow of steam by adopting tapered boilers, which give their largest area to the point of highest steam production. Churchward then dispensed with
168-479: A GWR-owned house near to the line at Swindon , and he retained his interest in the company's affairs. He never married. On 19 December 1933, now with poor eyesight and hard of hearing, he was inspecting a defectively-bedded sleeper on the down through line, when he was struck and killed by a Paddington to Fishguard express, pulled by No. 4085 Berkeley Castle . The locomotive was of the GWR Castle class ,
224-589: A farmer, married his cousin, Adelina Mary, daughter of Thomas Churchward, of Paignton , Devon, a corn and cider merchant. He was educated at the King Edward VI Grammar School , contained within the Mansion House on Fore Street, Totnes , Devon. His father's cousin, Frederick Churchward, head of the family, arranged private tuition at Hill House during the school holidays. He started his engineering training in 1871 with John Wright,
280-643: A further 50 new bogie singles was also built in March 1894, the last of the class being outshopped in March 1899. These new locomotives differed from the rebuilds in having their cylinder diameter reduced from 20 to 19 inches (508 to 483 mm), and the springs for the trailing wheels located above the footplate and outside the cab, necessitating a reduced width for the latter. The rebuilds subsequently had their cylinders lined down to 19 inches (483 mm). The entire class, as they required it, had their driving wheels fitted with thicker tyres from 1898 onwards, increasing
336-531: A further Churchward experiment, considered to explore what came beyond the Star Class when train loads increased beyond their capability. Basically a developed Star class locomotive, the larger boiler over trailing wheels allowed a firebox surface of 182 sq ft (16.9 m ), a 17.5% increase in size compared to the Star Class. It was also built with a Swindon No. 1 superheater. Due to its weight and 20 long tons 9 cwt (20.8 t) axle load,
392-472: A limited edition of the same model, this time bearing the name Lorna Doone . Hornby also produced Royal Sovereign, Great Western, Duke of Edinburgh and Achilles in 2008, 2010, 2009 and 2020 respectively. None of the original class survive, but a static replica of The Queen was commissioned by Tussauds for the Railways and Royalty exhibition at Windsor and Eton Central railway station . The replica loco
448-502: A limited number of standard parts—including boilers, cylinders, wheels and valve gear—he planned a range of locomotives for duties such as express passenger, mixed traffic, heavy freight and suburban trains, with both tender and tank versions. He began to construct some of his designs immediately; he also extended the range of designs as the demands of the business required, producing the 4300 Moguls and 4700 express freight engines. His mixed-traffic design did not appear until Collett built
504-465: A run from Plymouth to Paddington in 227 minutes. 3041 The Queen , originally named James Mason , was an example of this class allocated to Royal Train duties. Number 3046 Lord of the Isles has enjoyed a certain amount of celebrity, having been chosen as the prototype for a Tri-ang model locomotive. Since then the engine has also been modelled by Brio and Matchbox . In 2006, Hornby also produced
560-567: A series of two cylinder 4-6-0 locomotives. No. 100 was out-shopped in February 1902, named Dean (later William Dean ) in June 1902 to mark the latter's retirement. It incorporated a domeless parallel boiler , raised Belpaire firebox , 19 in (48.3 cm) diameter outside cylinders with 30 in (76.2 cm) piston stroke, and boiler pressure of 200 psi (1.38 MPa ). The piston valves were driven by rocking levers actuated by
616-510: A smaller-wheeled version of the 'Saint' class could form the basis of a successful mixed-traffic class of locomotives. He therefore rebuilt No. 2925 Saint Martin with 6 ft (1.829 m) driving wheels to become the prototype of his successful Hall Class locomotives. Thus the 2900 class became a template for later GWR 2-cylinder 4-6-0 classes including the Modified Hall , Grange , Manor and County classes, all of which were of
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#1732802084185672-441: A spring-centred block mounted beneath the steam chest on cross beams. This setup gave sufficient clearance so that, when the bolts were undone, the front end of the locomotive raised, and the bogie was run out from underneath, the steam chest cover could be removed without hindrance. No. 3021 was rebuilt as a 4-2-2 in March 1894. Between June and December 1894 the 28 remaining locomotives of the 3001 class were rebuilt. The first of
728-499: A stop to further experimentation without significant improvement. Although not a technical success, The Great Bear was considered the company's flagship locomotive from its introduction until Churchward's retirement in 1922. With the introduction of 4073 Caerphilly Castle in 1923 with a higher tractive effort , the locomotive ceased to have any publicity value and became an embarrassment. Due for heavy repairs in January 1924, it
784-490: A successful design by Charles Collett derived from Churchward's "Star" class . In Churchward's will of 4 October 1933 he bequeathed various sums of money to his staff, including his gardener, housekeeper, maidservant, parlour maid, assistant gardeners and two friends. He awarded his chauffeur £4,000 along with 2 lathes with various tools and accessories including guns, motor cars and accessories, fishing rods and tackle and wearing apparel. The majority of his £60,000 plus estate
840-723: A terse response: "Because one of mine could pull two of their bloody things backwards!" The biggest engineering challenge of the GWR's operations was travelling over the South Devon Banks , a series of steep inclines linking Exeter and Plymouth in Devon, on the GWR's most important route. Although speed was a key competitive driver across the whole GWR route, the South Devon Banks rewarded sure-footed locomotive designs with good adhesion. The largest opportunity to any GWR CME
896-494: Is credited with introducing to Britain several refinements from American and French steam locomotive practice. Among these were the tapered boiler and the casting of cylinders and saddles together, in halves. His choice of outside cylinders for express locomotives was also not standard in Britain for that time. Many elements of British practice were retained, of course. His locomotives for the most part used British plate frames, and
952-506: The BR standard class 5 are both derived from his Saint class early examples of which date to 1902. BR Western Region class 47 locomotive no. D1664 (later 47079) was named George Jackson Churchward upon delivery in February 1965. It was renamed G. J. Churchward in March 1979, and the name was removed in October 1987. Although Churchward had retired in 1922, he continued to live in
1008-433: The 7 in (178 mm) difference in driving wheel diameter. This scheme was not carried through because the connecting rods would not clear the lower slide bar, and the valve gear would be out of alignment. An alternative proposal to drop the locomotive 3.5 in (89 mm), and raise the buffer beam and dragbox , was also rejected on the grounds of cost. The class were gradually withdrawn between 1908 and 1915, with
1064-527: The GWR board authorised Churchward to purchase three French de Glehn -du Bousquet four-cylinder compound locomotives, in order to evaluate the benefits of compounding. Similar to the Paris-Orleans Railway's 3001 class and built by Société Alsacienne de Constructions Mécaniques , the first locomotive no.102 La France was delivered in 1903, with Nos. 103 and 104 purchased in 1905. The locomotives had two high pressure cylinders fitted between
1120-659: The Granges in 1936. The Great Western Railway 4000 or Star class were 4-cylinder 4-6-0 passenger locomotives introduced from early 1907. The prototype was built in May 1906 as a 4-4-2 Atlantic (but later converted to 4-6-0). The design benefited from experience gained from the 'Saint' class and the De Glehn engines. The locomotives proved to be very successful, handling the heaviest long-distance express trains, reaching top speeds of 90 mph (145 km/h), and they established
1176-748: The Locomotive Superintendent of the South Devon , Cornwall and West Cornwall railways, at the Newton Abbot works of the South Devon Railway. While there, he and his fellow pupil Robert Neville-Grenville developed a steam-powered car based on the boiler from a Merryweather fire-engine. When the GWR took over the South Devon Railway in 1876, Churchward had to move to the Swindon Works . In 1877, at
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#17328020841851232-521: The United Kingdom from 1902 to 1922. Churchward was born at Rowes Farm, Stoke Gabriel , Devon, where his ancestors (the senior line residing at Hill House; his paternal grandfather, Matthew, was the younger son of the head of the family) had been squires since 1457. He was the first son in a family of three sons and two daughters, brothers John (b.1858) and James (b.1860) and sisters Mary (b.1863) and Adelina (b.1870). His father, George Churchward,
1288-526: The axleboxes, springs and the complete wheel sets from the tender for use in their newbuild Atlantic project. Hornby Railways manufacture a model of the 3031 Class in OO gauge . A model of the "Duke of Connaught" was produced by Lesney Products as Y-14 in the Models of Yesteryear range from 1959 to 1963. The coat of arms of the old Borough of Swindon (1900–74) includes an image of 3029 White Horse on
1344-419: The basis of the GWR 2900 Saint Class . It appeared in four production series built between 1905 and 1913, each of which differed in dimensions. There were also differences between members of each series in terms of the boilers used, wheel arrangement (Churchward was unsure of the choice between 4-4-2 and 4-6-0), and arrangements for superheating. The locomotives performed well as passenger locomotives over all
1400-490: The boiler longer, not wider, bringing the smokebox and cylinders in front of the leading axle. The extra weight of the larger boilers was borne by the leading wheels, making the locomotives unstable, particularly at speed. On 16 September 1893 No. 3021 Wigmore Castle , hauling an express train, was derailed in Box Tunnel when the front axle broke. The cause of the accident was thought to be excessive weight being carried on
1456-650: The crew was accommodated in typical British fashion. The selection of a domeless boiler was more common to Britain than to the US. In 1901 Churchward produced a scheme of six different locomotive types based on a few standard parts. All would have cylinders with 18 in (45.7 cm) diameter and 30 in (76.2 cm) stroke, piston valves of 8 + 1 ⁄ 2 in (21.6 cm) diameter, and all leading or trailing wheels would be 3 ft 3 in (99.1 cm) diameter. Locomotive classes corresponding to all these proposals were eventually built, with some differences in
1512-462: The design principles for GWR 4-cylinder classes over the next twenty-five years. GWR 111 The Great Bear was the first 4-6-2 (Pacific) locomotive used on a railway in Great Britain, the only one of that type ever built by the GWR, which is today seen as Churchward's notable failure in locomotive design. No clear GWR commercial reason existed for the design, so it is concluded by many as
1568-535: The dimensions. [REDACTED] In September 1902 Churchward had a member of the Atbara Class , no. 3405 Mauritius , reboilered with a Belpaire firebox and the first use of a tapered boiler on the GWR. The boiler became the prototype for Churchward's GWR Standard No. 4 boiler. This experiment led to the design of the City class, with the first outshopped from Swindon in March 1903, No. 3433 City of Bath . It
1624-412: The dome and safety valve bonnet were made by Newcastle Metal Spinners. Tussaud's fitted smoke and steam generators, so steam was emitted from the cab, whistles, safety valves and smoke from the chimney. A sound unit was also fitted. The engine remains there, but the tender was scrapped to make more space for the shopping centre occupying that station building. The Bluebell Railway Atlantic Group purchased
1680-537: The early 1900s to the 1920s the Great Western's 2-cylinder and 4-cylinder 4-6-0 designs were substantially superior to any class of locomotive of the other British railway companies. On one occasion, the GWR's directors confronted Churchward, and demanded to know why the London and North Western Railway were able to build three 4-6-0 locomotives for the price of two of Churchward's "Stars". Churchward allegedly gave
1736-503: The end of broad gauge running on the Great Western Railway. A further 22 were built in late 1891 and early 1892, this time as standard gauge engines. Although the 4 ft 8 + 1 ⁄ 2 in ( 1,435 mm ) 3001 class were fitted with larger boilers than earlier GWR 2-2-2 classes, the diameter of the boiler was constrained by its position between the 7 ft 8 + 1 ⁄ 2 in (2.350 m) driving wheels. Thus boiler capacity could only be increased by making
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1792-636: The end of his pupilage, he moved to the drawing office, where he worked with "Young Joe" Armstrong to develop a vacuum brake. He was appointed Inspecting Engineer in June 1882, and six months later became assistant to the Carriage Works Manager, James Holden , taking over as Manager on Holden's departure in 1885. Ten years later he became Assistant Works Manager, and soon after Manager, of the locomotive works, and in 1897 became William Dean 's Chief Assistant and natural successor. After 5 years as Chief Assistant, during most of which time Dean
1848-475: The expansion link of Stephenson valve gear – this particular design was only used on no. 100. No. 98 was out-shopped in March 1903, to a similar design but with a taper boiler, re-designed valve gear layout and cylinders, and a shorter wheelbase. Valve diameters were increased from 6 + 1 ⁄ 2 inches (170 mm) to 10 inches (250 mm). No. 171 was out-shopped in December 1903, incorporating
1904-410: The frames, and two low pressure cylinders outside. Each was initially fitted with a standard-pattern GWR chimney, a GWR tender and had their numbers positioned in GWR fashion on the sides of the cab. They were then each placed into service to evaluate performance, and then following engine crew feedback were modified to test other aspects of Churchward's design experimentation and philosophy. In 1926,
1960-429: The front axle, so it was decided to replace the leading pair of wheels in the 3001 class with a bogie . In the 3001 class the steam chest was located underneath the cylinders, and contained two slide valves . The inverted placement of the valves allowed them to drop away from the face of the steam ports when steam was shut off, thus reducing wear. The steam chest and valves lay above the front carrying axle, and there
2016-519: The improvements to No. 98 but with a 225 psi (1.55 MPa ) boiler and minor amendments to the heating surface and grate area. Built as a 4-6-0, in October 1904 it was converted to a 4-4-2 to enable better comparison with the performance of the French de Glehn compound; it was reconverted to 4-6-0 in July 1907. Named Albion in 1904, it received a superheated boiler in 1910. On succeeding Dean,
2072-485: The last survivor, no. 3074 Princess Helena , being withdrawn in December 1916. All of the originals were scrapped, but a non-working replica was built in the early 1980s. 3065 Duke of Connaught made a record-breaking run with the Ocean Mail on 9 May 1904 (having taken over the train from City of Truro at Bristol), covering the distance from Bristol (Pylle Hill) to Paddington in 99 minutes 46 seconds as part of
2128-547: The locomotive was restricted to the Paddington to Bristol main line, mainly under Paddington driver Thomas Blackall, originally from Aston Tirrold , Oxfordshire. Despite later experimental developments, in service the performance of The Great Bear proved to be disappointing, and not a significant improvement on existing classes. The excellent performance of the Star Class and advent of the First World War brought
2184-636: The long-distance routes of the GWR and on all but the fastest express trains until they gradually became displaced to secondary services by the Castle Class in the late 1920s and 1930s. However, the 6 ft 8 + 1 ⁄ 2 in (2.045 m) driving wheels limited their usefulness on freight trains. Churchward had recognized this limitation by the introduction of his GWR 4700 Class 2-8-0 design with 5 ft 8 in (1.727 m) driving wheels in 1919, intended for express goods trains. However, Churchward's successor Charles Collett felt that
2240-660: The minimum loss of pressure as steam passed to the cylinders. Churchward's resulting locomotive designs excluded trailing wheels , which maximised adhesion on the South Devon Banks. He was an early adopter in UK locomotive design of superheating , made efficient through the GWR's exclusive use of the high calorific-value steam coal from the South Wales Coalfield . He also adopted large bearing surfaces to reduce wear, something common in North America. Churchward
2296-497: The need for a large dome to collect steam, using instead top-feed of water supply from injectors, which together with top-fitted clack boxes hidden within a brass "bonnet" minimised boiler stress. Churchward experimented with compounding, a principle development for marine engines which was widely adopted in European locomotive design. Although through his experimentation Churchward found little difference in operation in terms of
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2352-591: The same basic design. The class incorporated many revolutionary advances which were influential in British locomotive design for the next fifty years. According to The Great Western Society, 'Saint' class locomotives "represented one of the most important steps forward in railway traction of the 20th century", and they "are now acknowledged to have had a profound influence on almost every aspect of subsequent steam locomotive development". The Saints and their derived classes were only part of Churchward's scheme. Based on
2408-502: The shield. The coat of arms was displayed on the splashers of the last Castle Class built (No. 7037 Swindon ). STEAM Museum of the Great Western Railway at Swindon acquired one of the splashers in 2012. George Jackson Churchward George Jackson Churchward CBE (31 January 1857 – 19 December 1933) was an English railway engineer, and was chief mechanical engineer of the Great Western Railway (GWR) in
2464-467: The three locomotives were based at Oxford shed. In operational practice, compounding did not provide any significant improvement in either performance or economy compared to No 171 Albion , Churchward's prototype 4-6-0, which was converted to a 4-4-2 specifically for direct comparison with them. A further 13 engines in the Saint class were also originally built as 4-4-2s. Experimental 4-6-0 No. 171 formed
2520-498: The title Devonia . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Devonia&oldid=358504816 " Category : Disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages GWR 3031 Class The Dean Single , 3031 Class , or Achilles Class
2576-432: The total power developed in compounding locomotives, the use of European locomotives in his trial led to his adoption of higher pressure boilers, and drive power split between two axles on four cylinder designs. His third stream of philosophy was based around piston valves. Churchward's valves were 50% larger than anything seen in the UK to that time, travelled 50% further, and were designed to be concealed. The result gave
2632-501: The wheel diameter by one-half inch (12.7 mm) to 7 ft 8 + 1 ⁄ 2 in (2.350 m). In 1900, George Jackson Churchward replaced the boiler on number 3027 Worcester with a parallel Standard 2 boiler. Twelve further engines were similarly converted in 1905 and 1906. Despite the locomotives' speed, the 4-2-2 design was soon found to be outdated and unsuitable for more modern operation. A proposal to improve their performance by fitting them with long-travel valves
2688-477: The wheels for the front bogie and the rear wheels. The top halves of the driving wheels do not exist, while the bottom halves were cast from 2 quarters, being bolted together to make a half. The driving wheels also do not sit on the rail so the loco could be wheeled into position on its front bogie and rear wheels. Some boiler fittings were obtained from the Great Western Society and sandblasted, and
2744-575: Was a type of steam locomotive built by the British Great Western Railway between 1891 and 1899. They were designed by William Dean for passenger work. The first 30 members of the class were built as 2-2-2s of the 3001 Class . The first eight members of the class (numbers 3021-3028, built April–August 1891) were built as convertible 7 ft 1 ⁄ 4 in ( 2,140 mm ) broad gauge 2-2-2 locomotives, being converted to standard gauge in mid-1892, at
2800-551: Was completed in December 1982 and displayed outside Steamtown in January 1983 (where it was constructed), before being transported by road to Windsor on 12 January 1983 and arriving on 14 January. The main frames, footplate, 'boiler', smokebox, cab and splashers were fabricated by Babcock's of Tipton. The tender was modified from an LBSCR C2x tender. Parts from a GWR tender, that came from the Dumbleton Hall Preservation Society, were used to provide
2856-490: Was fitted with the final form of the Standard No.4 boiler, with slightly curved sides and a tapered top to the firebox. The class soon became one of the most famous classes of locomotives in the world, when City of Truro became the first engine in the world to haul a train at 100 miles per hour in 1904 (although unauthenticated). In 1901, whilst still assistant to Dean, the GWR board approved Churchward's plan to build
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#17328020841852912-404: Was found to be impracticable; the existing valves were directly driven from eccentrics mounted on the driving axle, and there was insufficient clearance to fit larger eccentrics. Churchward considered rebuilding the class as Armstrong Class 4-4-0s with 7 ft 2 in (2.184 m) coupled wheels. The cylinder centre line would then be 3.5 in (89 mm) above the driving centre, due to
2968-430: Was ill and delegating much of his design work to Churchward, in 1902 he formally succeeded Dean as Locomotive Superintendent. In 1900 he became the first mayor of Swindon. In the 19th and early 20th century, railway companies were fiercely competitive. Speed meant revenue and speed was dependent on engineering. Churchward delivered to the GWR from Swindon a series of class-leading and innovative locomotives. Arguably, from
3024-401: Was sufficient clearance to allow the steam chest cover to be removed over the axle for maintenance. Replacing the axle with a bogie of conventional design would have obstructed access to the port faces. Dean instead used a suspension bogie, in which the weight of the locomotive was transferred upwards to the bogie by four bolts mounted on the inside frames. The centre pin of the bogie rotated in
3080-554: Was the resulting large loading gauge legacy of the GWR's conversion from Brunel's broad gauge track to standard gauge, allowing for wider and higher designs than any of the other later Big Four railway companies . Churchward's design philosophy followed a number of streams of development, for which he thoroughly researched both competitor UK designs, as well as European and North American locomotives. Following principles based on Belgian inventor Alfred Belpaire , Churchward preferred free steaming boilers. This resulted in his use of
3136-573: Was withdrawn from service by Churchward's successor Charles Collett . It emerged from Swindon later that year as a 4-6-0 Castle Class, given the name Viscount Churchill . In 1922 Churchward retired, and C. B. Collett inherited his legacy of excellent, standardised designs. These designs influenced British locomotive practice to the end of steam. Major classes built by the LMS and even British Railways 50 years later are clearly developments of Churchward's basic designs. The LMS Stanier Class 5 4-6-0 and
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