Title: Napier Deltic - Wikipedia
Headings: Napier Deltic
Napier Deltic
Contents
History and design
Uses
Naval service
Railway use
Fire department use
Reliability in service
Turbo-compound Deltic
Comparable engines
See also
References
Further reading
External links

Content: Railway use
Napier Deltic powered British Rail Class 55 D9009 Alycidon, at the National Railway Museum, York, UK
Main articles: British Rail Class 55 and British Rail Class 23
Napier Deltic engine at the National Railway Museum, York, UK
The "Deltic" engines were used in two types of British rail locomotive: the 1961–62 built class 55 and the 1959 built class 23. These locomotive types were known as "Deltics" and "Baby Deltics", respectively. The Class 55 used two D18-25 series II type V Deltic engines: mechanically blown 18-cylinder engines each rated at 1,650 hp (1,230 kW) continuous at 1500 rpm. The Class 23 used a single less powerful nine-cylinder turbocharged T9-29 Deltic of 1,100 hp (820 kW). Six out of the original 22 "Deltic" locomotives survive, four of which have, at various times since 1996, returned to work on the main line, operating both service trains and charter trains. D9000 "Royal Scots Grey", the doyen of the class, was returned to main line serviceable status in 1996 and continued to work throughout the UK for nearly twenty years. Following a power unit failure this locomotive was fitted, for a time, with an ex-Norwegian Navy T18-37K type, after various modifications were cleverly designed to make the new unit compatible.