| BR Class 35 | | TOPS numbers | Not Carried | | Early numbers | D7000–D7100 | | Builder | Beyer Peacock (Hymec) Ltd | | Introduced | 1961 | | Wheel Arrangement | B-B | | Weight | 75 t 8 cwt | | | Height | 12 ft 10in | | Width | 8 ft 10 in | | | Length | 51 ft 8.5 in | | | Wheel Dia. | 3 ft 9 in | | | Total Wheel Base | 36 ft | | | Minimum radius | N.A. | | Maximum speed | 90 mph | | | Engine output | 1,700 hp at 1,500 rpm | | | Max. Tractive Effort | 46,600 lbf | | | Power at Rail | N.A. | | Brake type | Air locomotive brake
Vacuum train brakes | | Brake force | 57 tons | | | Route availability | 6 | | Fuel Tank | 800 imperial gal | | | Heating type | Steam |
 Preserved D7017 at Minehead in 1979 The British Rail Class 35 is a class of mixed traffic Bo-Bo diesel locomotive with hydraulic transmission. On account of their Mekydro-design hydraulic transmission units, the design became known as the Hymeks. Image File history File links Size of this preview: 800 × 530 pixel Image in higher resolution (1402 × 928 pixel, file size: 241 KB, MIME type: image/jpeg) BR Class 35 No. ...
Image File history File links Size of this preview: 800 × 530 pixel Image in higher resolution (1402 × 928 pixel, file size: 241 KB, MIME type: image/jpeg) BR Class 35 No. ...
Logo of British Rail British Railways (BR), later rebranded as British Rail, ran the British railway system from the nationalisation of the Big Four British railway companies in 1948 until its privatisation in stages between 1994 and 1997. ...
A Bo-Bo is in UIC notation a locomotive with two four-wheeled bogies with all axles powered. ...
Diesel locomotives became the dominant type of locomotive in rail transport in the mid 20th century in much of the world. ...
// A hydraulic or hydrostatic drivesystem is a drive- or transmission system that makes use of a hydraulic fluid under pressure to drive a machinery. ...
Development
The type was developed for the Western Region of British Railways, which had opted for lightweight locomotives with hydraulic transmission when allocated funds under the British Railways Modernisation Plan of 1955. 101 of the class were built between 1961 and 1964 when it became apparent that there was a requirement for a medium power diesel-hydraulic design for both secondary passenger work and freight duties. The Western Region may be: Western Ghana Western Region of British Railways This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ...
Logo of British Rail British Railways (BR), later rebranded as British Rail, ran the British railway system from the nationalisation of the Big Four British railway companies in 1948 until its privatisation in stages between 1994 and 1997. ...
1961 (MCMLXI) was a common year starting on Sunday (the link is to a full 1961 calendar). ...
1964 (MCMLXIV) was a leap year starting on Wednesday (the link is to a full 1964 calendar). ...
The builder, Beyer Peacock (Hymek) Ltd, was a joint venture between Bristol Siddeley Engines (BSE) (licensed to build Maybach engines), Stone-Platt Industries (licensed to build Mekydro transmissions) and the locomotive manufacturer Beyer Peacock. At the time they were built, the Hymeks were the most powerful diesel hydraulic locomotive operating with a single engine - the Maybach MD870. Unlike the higher-powered diesel-hydraulic Warship and Western locomotives in the Western Region fleet (with dual Maybach MD655 engines), the Hymeks were not based on an existing West German design. Beyer-Peacock Locomotive manufacturer with factory in Manchester from 1854 untill 1966. ...
D852 Tenacious at Old Oak Common, 1964 British Railways Type 4 Warship class diesel hydraulic locomotives were introduced in 1958. ...
British Rail assigned Class 52 to the class of 74 large Type 4 diesel-hydraulic locomotives built for the Western Region of British Railways between 1961 and 1964. ...
Withdrawal from service began in 1971, and by 1975 all had been withdrawn. Their early withdrawal was caused, primarily, by issues within BR concerning the non-standard hydraulic transmission. They were allocated to Bristol Bath Road, Cardiff Canton and Old Oak Common. 1971 (MCMLXXI) was a common year starting on Friday. ...
1975 (MCMLXXV) was a common year starting on Wednesday. ...
Liveries When first built, the Hymeks were given a more elaborate livery than many of the contemporary British Railways diesel classes. The main body of the locomotive was the standard dark Brunswick green, but with a lime green stripe along the bottom of the bodywork. The roof was medium grey, and the finishing touch was to paint the window surrounds in ivory white. In the early 1960s, yellow warning panels were added to the lower part of the front ends, in accordance with BR's then-new policy. Following the corporate identity campaign and the change of name to British Rail plus introduction of the "double arrow" logo in 1964, some locomotives received all-over British Rail blue with small yellow warning panels. This was quickly changed by the return of off-white window surrounds. The final variation was BR blue with full yellow ends, the yellow being extended around the cab side windows.
Operational service The type was initially employed on secondary passenger services, such as Paddington to Hereford and semi-fast services to the west of England and Wales. They also worked pickup freights throughout the Western Region as a mixed-traffic design. The Hymeks were capable of operating in multiple, but only with each other. The electro-pneumatic control system allowed only one trailing locomotive to be controlled (by one driver): some trains were operated by three locomotives (all at the front of the train), but in these cases only two locomotives were connected in multiple, the third having a separate driver. None of the class was named.
Withdrawal Prejudice against the Western Region's diesel-hydraulic fleet had been present in other divisions of British Rail ever since the designs were first ordered. The aim of the Modernisation Plan, and in particular the rapid conversion of the entire BR fleet to diesel and electric traction, had been to stem BR's financial losses thought to arise partially from the labour-intensive nature of steam locomotive use. Although steam was eliminated from mainline use by 1968, many unsuitable designs of diesel locomotive had been rushed into service in the rush to achieve steam-free operation. The National Traction Plan of 1967/8 decreed that designs proving unreliable, expensive to maintain or non-standard should be eliminated as quickly as possible in order to reduce the number of diesel classes from 28 to 15 by the year 1974. The engineering factions of the British Railways Board, the body that oversaw BR's operations from 1962 onwards, felt that all of the Western Region's diesel-hydraulic fleet should be counted as non-standard and should be withdrawn as quickly as possible. Despite the fact that the Hymeks were statistically the most efficient of the Western Region's diesel-hydraulic fleet in terms of reliability, the entire class was withdrawn between 1971 and 1975. They were replaced by class 37 diesel-electric locomotives made redundant in other regions as a result of line closures and general decline in rail-borne freight traffic throughout the 1960s. The British Railways Board (BRB) was the governing body of British Railways (later British Rail) from 1962 until privatisation in the 1990s. ...
D6712 at Liverpool Street, 1963 in BR green with yellow warning panels. ...
Preservation Four locomotives survived to be preserved. D7076 survived, along with sister locomotive D7096, at the Railway Technical Centre near Derby, where they were used as dead loads for research purposes. Warship no. D832 Onslaught was additionally present at this site. Both Hymeks were in poor condition, however it proved possible to rebuild one by using the other as a donor locomotive. D7076 was therefore restored using parts from D7096 and carries the number D7096 internally in one driving cab as a nod to the donor locomotive, which was reduced to a shell and subsequently scrapped. As of March 2007, D7076 is the only preserved Hymek in operational condition. The West Somerset Railway (WSR) is a heritage railway that runs along the edge of the Quantock Hills in Somerset, England, between Bishops Lydeard and Watchet, and then along the coast to Minehead. ...
The West Somerset Railway (WSR) is a heritage railway that runs along the edge of the Quantock Hills in Somerset, England, between Bishops Lydeard and Watchet, and then along the coast to Minehead. ...
LMS Ivatt Class 2MT 2-6-0 no. ...
LMS Class 3F Jinty 0-6-0T No. ...
The Railway Technical Centre was built by the British Railways Board in the early 1960s in Derby to be its technical headquarters. ...
D852 Tenacious at Old Oak Common, 1964 British Railways Type 4 Warship class diesel hydraulic locomotives were introduced in 1958. ...
2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the Anno Domini (common) era. ...
Hymeks in fiction A Class 35 Hymek was featured in The Railway Series books by Rev. W. Awdry (the original 'Thomas the Tank Engine' stories). D7101 (a fictional number), later named Bear on account of the growling noise made by his engine, was introduced in book No.23 Enterprising Engines as one of the few good diesels. He however has not featured in the Thomas the Tank Engine and Friends TV Series. Map showing the railways on the fictional Island of Sodor (click to enlarge). ...
Wilbert Vere Awdry, OBE, (June 15, 1911 – March 21, 1997), better known as the Reverend W. Awdry, was a clergyman, railway enthusiast and childrens author. ...
To meet Wikipedias quality standards, this article or section may require cleanup. ...
To meet Wikipedias quality standards, this article or section may require cleanup. ...
// The Rev. ...
Thomas & Friends (formerly Thomas the Tank Engine and Friends, also known as Thomas the Tank Engine) is a British childrens television series which was first broadcast in 1984. ...
References - Diesel & Electric Preservation Group - owners of D7017 & D7018
- Reed, Brian. Diesel-Hydraulic Locomotives of the Western Region, David and Charles 1974. ISBN 0-7153-6769-2
Image File history File links Commons-logo. ...
Wikimedia Commons logo by Reid Beels The Wikimedia Commons (also called Commons or Wikicommons) is a repository of free content images, sound and other multimedia files. ...
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