The locos also had modifications to their nose ends, losing the gangway doors and headcode discs in favour of a central roller blind headcode box. 19 June 1959 - D5909 was the last Baby Deltic to be delivered. The refurbished locos were a considerable improvement on the original design and were also tidied up aesthetically - with centre headcode boxes and two-tone green livery they bore a resemblance to the type 5 locos (Class 55) and now really were 'Baby' Deltics. 37372 into which the engine was temporarily fitted whilst undergoing running tests. With him taking my place in the driving seat we went for a short trip in the yard. They were broadly similar in appearance to the type 'C' locos (later Class 40) ordered at the same time, although much shorter. In reality they spent a considerable time at Hitchin Depot. 31 January 1959 - contract delivery date for the last locomotive (D5909). 25 June 1964 - D5904 was the first Baby Deltic to be delivered from VF to BR Doncaster Works post refurbishment. This would however have added eight tons in extra weight, and so was rejected. Much of the over-weight was due to ancillary components, particularly the train-heating steam generators, being supplied over weight. [9] D5909 was the only locomotive to receive the full "rail blue" livery. August 1973 - D5905 & D5909 cut up at Cohen's, Cransley. 5.1K likes. Four main engine problems had been identified: In July 1961 BR suggested replacing the Napier engine with an English Electric 8SVT V8. 30 December 1968 - D5900 & D5903 condemned. By around 1963 all the locomotives had gradually been moved to Stratford Depot as they failed and were added to the line in store, pending a decision on their future. The lightened locomotives eventually met British Rail's approval, but only after a painstaking weighing that involved specifying the amount of sand in the sandboxes and other precise details.[2]. They were based at Hornsey, although at weekends were usually located at Hitchin engine shed. 12CSUT engine. Although they suffered problems with the cylinder liners that were not dissimilar to those of the Class 55 Deltics, most of the Class 23's early problems were a variety of failures with the engine ancillaries. Baby Deltic Class 23 D5901 The British Rail Class 23 were a class of ten Bo-Bo diesel-electric locomotives built by the English Electric Company (EE) in 1959. Log in. The Type 2s were averaging 30-40,000 miles per failure, the Baby Deltic less than a quarter of this. The power unit used was a Napier Deltic T9-29 9-cylinder engine of 1,100 bhp (820 kW) driving an … December 1969 - D5908 cut up at Cashmore's, Great Bridge. To avoid waste, these components were replaced by lighter versions from other makers, but the heavier originals were then used in the Class 20 and Class 40 locomotives. The T9-29 diesel engine was a single, half-sized version of those used in the more powerful British Rail Class 55 'Deltic' locomotives, and the overall design and external appearance of the Class 23 was also similar to the Class 55, but much shorter, leading to their nickname of Baby Deltics. Many engines seized because this shaft driving the auxiliaries snapped and then whipped round, rupturing coolant hoses and causing overheating.[4]. 29 March 1977 - power unit 388 claimed by the National Railway Museum (NRM) and moved to York on 16 August 1977. Baby Deltic D5901 when sent back to EE Vulcan foundry for the refurbishment programme and was converted to accept a new propotype engine that EE were doing 12 CSUT 1500hp Vee engine thus it would make the locomotive a Type 3. New management at EE decided not to proceed with the U engine project and pulled the plug. Much of the over-weight was due to ancillary components, particularly the train-heating steam generators, being supplied over weight. 3 April 1959 - first loaded test of a Baby Deltic on BR, D5902 worked light VF - Edge Hill (Liverpool), then Edge Hill - Penrith & return. April 2009 - 388 installed in what was to become the donor loco for the re-creation. body, Welded steel chassis: Sprung buffers: Laser cut fully sprung welded steel bogies: Dummy fuel tank: Clevis coupling (rear) Hook (front) 4QD 24 Volt Pro-150 Digital controller: 4QD RBT 24 hand control unit: Ready-to-run Between 1960 and 1965 the Class 23 was available in 000 (approximately N-gauge) gauge as part of the Lone Star "Treble-O-Lectric" range of diecast models in both powered and unpowered versions. The Class 23 "Baby Deltic" is being made as a kit and ready-to-run in OO gauge by Silver Fox Models. The Baby Deltic Project purchased Class 37no. This is being achieved by way of shortening 37372's body in three places and mounting it on Class 20 bogies. [12][13] 6 March 1963 - D5901 entered VF for conversion to take an all-new EECo. The livery also changed to two tone green with grey roof similar to that of the British Rail Class 55s so they looked every bit a 'Baby Deltic'. The British Rail Class 23 were a class of ten Bo-Bo diesel-electric locomotives built by the English Electric Company (EE) in 1959. The T9-29 engine is currently in store at the Barrow Hill Roundhouse near Chesterfield (and not on public display) whilst the Baby Deltic Project completes modification work to the locomotive. The locomotives gradually returned to traffic and became very reliable in traffic except for continuing coolant system problems. A book about the restoration of the sole-remaining 'Baby' Deltic engine has been published by The Baby Deltic Project[10] and is available through their website.[11]. [7] The Remarkable Survival of Steam Locomotive 80150, Volunteers bring new life to the Somerset and Dorset railway, Somerset and Dorset Railway Anniversary Event, How to make your model railway look realistic, How to go on holiday via the West Somerset Railway, Steam Locomotive Restoration of Merchant Navy 35011, The locomotives look handsome and well proportioned. Donations to the Project can be made by visiting the 'Shop and donate' link, above. 15 June 1963 - D5905 was the last Baby Deltic to be withdrawn for major overhaul & modification. The locomotives were later banned from Moorgate because of excessive exhaust smoke in the tunnels. Despite a generous availability of spare engines, four of the ten locomotives were out of service at the time. We walked over to D5905 which was stabled alongside D5909. 17 April 1959 - D5903 was the first Baby Deltic to be delivered to BR. 20 September 2003 - power unit 388 makes its first public appearance, at Barrow Hill. March 1977 - D5901 was the final Baby Deltic to be cut up. 14 April 1965 - D5901 was the final Baby Deltic to be delivered from VF to BR Doncaster Works post refurbishment. They were numbered from D5900 to D5909.[1]. 22 October 2008 - 388 runs again for the first time in over 30 years. 12 May 1959 - D5904 became the first Baby Deltic to appear at Broad St (16:38 Broad St - Baldock). A photograph of the engine being started has been published in Rail Express magazine,[8] and videos of the event are available online. 6 September 1969 - D5901 taken to BR Research at Derby for use as motive power for the Tribometer train. The remainder followed fairly quickly with the last one, D5909 being withdrawn in March 1971. These were D5900/3/4/8; D5908 also carried the new double-arrow BR symbol. It was replaced by a Class 24 in 1975 and moved to Doncaster Work in early-1976 where it was cut up in March 1977. 23 January 1957 - order placed by British Railways (BR) with Vulcan Foundry Ltd (VF) for ten locomotives. Welcome to the homepage of the new website for the BDP. 388 along with its main and auxiliary generators. "Baby Deltic" D5902 at King's Cross, July 1966. By October 1960 the emphasis of failures had shifted from the ancillaries to the engine itself. All Rights Reserved | The Baby Deltic Project. A programme of lightening was begun: some of this involved cutting circular lightening holes into the bogie frames, and replacing steel buffer beamsor roof panels with aluminium. [6] By the late 1960s BR had drawn up a "National Traction Plan", whose aim was to rationalise the number and types of diesel locomotives in traffic (and thus reduce operating costs). 12 July 1958 - contract delivery date for the first locomotive (D5900). After D5901 was finally withdrawn the decision was taken to transfer the engine to the National Railway Museum in York. The locos were powered by a 9-cylinder Napier Deltic engine of type T9-29 rated at 1,100 hp at 1,600 rpm and were mounted on two-axle bogies giving a Bo-Bo wheel arrangement. It had been stored at Stratford TMD being retained as a spare for D5901 whilst it continued in service at the RTC. On initial completion, the first locomotives were found to weigh 3 long tons (3.05 t; 3.36 short tons) over the specification weight of 72 long tons (73.2 t; 80.6 short tons). D5901 was transferred to the departmental fleet of the Railway Technical Centre in 1969. Ten type 'B' locos were ordered from English Electric under the pilot scheme for main line diesel locos as part of the BR modernisation plan of 1955. The locomotives were put to work on King's Cross outer suburban duties such as the Cambridge Buffet Express as well as services from Kings Cross to Moorgate sub-surface platforms via the 'widened lines' (more recently, part of Thameslink). The first of the class was held at Vulcan Foundry whilst EE tried to reduce the weight but this could not be completed to a satisfactory standard. The auxiliary gearbox used to drive the compressor and cooling fans was a particular problem, suffering from vibration in its geartrain and a resonant whirling in the long drive shaft to it at particular rpm.
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