The sixteen year three month career of D5299/25149 included allocations to several London Midland Region depots, with a predominance of those in northern England.
Built: BR Derby Locomotive Works.
D5299 was new to the Nottingham Division (D16) on October 16th 1965. Further transfers were:
October 1967 to London Midland (Midland) Lines.
Renumbered September 14th 1973.
25149 was the 122nd Class 25 withdrawn, the only Class 25 retired during January 1982.
After withdrawal 25149 was stored at Toton until April 26th 1982 when it was moved (see details below) to Swindon Works and scrapped there during the last week of May 1983.
25129/149 Toton – Swindon Works April 21st 1982 with 20068/88.
Works visits (records incomplete).
Derby Works August & September 1973 ?? (full repaint); noted very ex-works September 1973.
D5299/25149 had been earmarked as the testbed locomotive for a prototype Sulzer six cylinder power unit producing 1,700hp.
In 1962 Sulzer, seeking to increase the output of the LDA & utilising ideas already incorporated in the LVA series, produced two six cylinder prototypes rated at 1,700hp at 850rpm. Of similar size to the 6LDA28 engine it was planned to be offered only in the six & eight cylinder inline types, and aimed at those world markets where simplicity and ruggedness were essential. Designated as the LDA28-R the cylinder bore remained at 280mm, the stroke altered to 330mm to keep the mean piston speed within acceptable limits. Built by Vickers Armstrong one unit was sent to Winterthur for testing (and later to Zurich University?) and later scrapped, the other was to be installed in a Class 25. The development was cancelled in 1967 when resources were reallocated to deal with the major problems affecting the 12LDA28C engine and more interest lay in the further development of the LVA line. D5299, the Class 25 chosen as the testbed would be delivered out of sequence and powered by a standard 6LDA28B engine.
From within Sulzer the opinion was that the 'R' engine was only built to prove that it was possible to design and build an LDA28 without all the problems associated with the earlier engines. Only two six cylinder 'R' series engines were built. The power unit intended for D5299, remained at Vickers until about 1970 when it was sold to a North Wales scrap merchant. It was not immediately dismantled, later receiving a new lease on life following the industrial disputes of the 1970s that affected the electricity supplies. It was purchased by Kays Mail Order to power a standby generator at their warehouse in Worcester. The eight cylinder version of the 'R' engine, rated at 2,300bhp at 850rpm was never built. It only existed on the drawing board and publicity brochures.
The final date to traffic for D5299 was October 16th 1965, between D7560 (delivered September 18th 1965) and D7561 (delivered October 23rd 1965), almost one year after it would have been delivered if it had been fitted with a normal power unit.
On July 2nd 1979 25149 & 25293 worked the 08.46 Burton on Trent - Skegness and 18.38 return. On July 3rd 25136 & 25149 worked a Nuneaton - Scarborough excursion as far as Alfreton where they were failed, 20158 & 20088 provided assistance to?
25149 was stabled at Manchester Victoria on September 22nd.
40116 & 25149 were noted northbound light engines at Sellafield on August 25th.
25149 was noted northbound at Syston with a short engineers train on October 19th.
Passenger workings courtesy Alan Baylis (www.class25.info)
8/1000 (or 19/778?)
Page added August 17th 2013