22 October 2008 - 388 runs again for the first time in over 30 years. The Baby Deltic Project. 6 September 1969 - D5901 taken to BR Research at Derby for use as motive power for the Tribometer train. quotation made to BR for 'thorough refurbishment' of all ten locos. This is being achieved by way of shortening 37372's body in three places and mounting it on Class 20 bogies. 12 March 1971 - D5905 hauled to Stratford DRS, power unit 388 removed and kept as a spare for D5901.
7 April 1959 - D5909 sent to BR Doncaster Works for weighing, returning to VF on 9 April 1959. By mid-1968 their non-standard status got the better of them and they fell victim to the BR Standardisation Plan, the first loco being withdrawn in October. 1 April 1959 - first test of a Baby Deltic on BR, D5902 worked with one carriage VF - Chester & return. D5901 was transferred to the departmental fleet of the Railway Technical Centre in 1969. Locomotive mileages had only reached 40-60,000 miles each, including stoppages, whilst in this 18 months there had been 44 engine changes across only 10 locomotives. 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). 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.
The locomotive can be viewed in the Barrow Hill Roundhouse near Chesterfield where it currently undergoing the transformation from 37372 into D5910. EE also pointed out that the locomotives were now highly reliable in general, except when a major failure required the considerable downtime for an engine change.
Many engines seized because this shaft driving the auxiliaries snapped and then whipped round, rupturing coolant hoses and causing overheating..
The locomotives would have looked very similar to the eventual Class 50s, though slightly longer. 25 June 1964 - D5904 was the first Baby Deltic to be delivered from VF to BR Doncaster Works post refurbishment. The power unit used was a Napier Deltic T9-29 9-cylinder engine of 1,100 bhp (820 kW) driving an …
The locomotives gradually returned to traffic and became very reliable in traffic except for continuing coolant system problems. Abusive or uninformed comments will be removed. All Rights Reserved | The Baby Deltic Project. I remember seeing them on these workings. He remembered us from a previous visit and our obvious interest in locomotives. 5.1K likes. August 1970 - D5902 cut up at Cohen's, Cransley. 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 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. In their original guise the locos could never have been referred to as a success, all of them being stored by 15 June 1963 prior to a refurbishment programme which was completed by 15 April 1965. We walked over to D5905 which was stabled alongside D5909. Four main engine problems had been identified: In July 1961 BR suggested replacing the Napier engine with an English Electric 8SVT V8. It had been British Rail's original intention to work the locos across London on the widened lines but the locomotives were found to be too heavy. A programme of lightening was begun: some of this involved cutting circular lightening holes into the bogie frames, and replacing steel buffer beams or roof panels with aluminium. By October 1960 the emphasis of failures had shifted from the ancillaries to the engine itself.
The connections that connect the shortened nose at the No.1 end and the main solebar have now been completed. 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'.
, Other services entrusted to the class were race specials run from King's Cross to race meetings at Newmarket. After D5901 was finally withdrawn the decision was taken to transfer the engine to the National Railway Museum in York. By November 1959, seven engines had been changed and this reduced availability first raised comparisons with the better reliability of the British Rail Class 24 Type 2. Updates, news, etc., will be published in the 'News' page - see the link, above or below. A friend and I went, as usual, to ask the duty supervisor if we could have a look round. 15 June 1963 - D5905 was the last Baby Deltic to be withdrawn for major overhaul & modification. 4 September 1962 - EECo. They were based at Hornsey, although at weekends were usually located at Hitchin engine shed. Much of the over-weight was due to ancillary components, particularly the train-heating steam generators, being supplied over weight. 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. January 2001 - power unit 388 discovered under a tarpaulin at the NRM and subsequently bought by the nascent BDP. Much of the over-weight was due to ancillary components, particularly the train-heating steam generators, being supplied over weight. The T9-29 diesel engine was a single, half-sized version of those used in the more powerful 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.  The allocation of all ten locomotives in October 1967 was Finsbury Park.. The last two locos in traffic on revenue-earning service were D5905 and D5909. In 2001 the engine was purchased by the Baby Deltic Project and restored to operational condition in 2008. Welcome to the homepage of the new website for the BDP.
  4 September 1962 - EECo. They were broadly similar in appearance to the type 'C' locos (later Class 40) ordered at the same time, although much shorter.
British railway locomotives and miscellany, 1948 to present, Technical, design and reliability problems, http://www.brdatabase.info/locoqry.php?action=class&type=D&id=21, Webb, The Deltic Locomotives of British Rail, http://www.thebabydelticproject.co.uk/#/the-project-in-greater-detail/4543667149, "BR Class 23 Bo-Bo English Electric (Disc Headcode)", "BR Class 23 Bo-Bo English Electric (Roller Headcode)", Recognition and equipment information :Class 23, https://en.wikipedia.org/w/index.php?title=British_Rail_Class_23&oldid=976407310, Standard gauge locomotives of Great Britain, Diesel-electric locomotives of Great Britain, Articles with unsourced statements from November 2019, Creative Commons Attribution-ShareAlike License, Fractured cylinder liners from the injector hole, caused by assembly stresses. D5909 was the only locomotive to receive the full "rail blue" livery. The Type 2s were averaging 30-40,000 miles per failure, the Baby Deltic less than a quarter of this. 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. History Edit 18 February 1976 - D5901 hauled to BR Doncaster Works. In reality they spent a considerable time at Hitchin Depot.
July 1969 - D5906 & D5907 cut up at Cohen's, Cransley.
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. 20 September 2003 - power unit 388 makes its first public appearance, at Barrow Hill. February 1962 - D5903 was the first Baby Deltic to be withdrawn pending major overhaul & modification. December 1969 - D5908 cut up at Cashmore's, Great Bridge. 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..
New management at EE decided not to proceed with the U engine project and pulled the plug. On 5 September 2010, the Baby Deltic Project announced its plans to create a new member of the class.
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