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Old 12th October 2017, 22:13
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Quote:
Originally Posted by Malcolm G View Post
SIX pistons arranged as 3 opposing pairs with three crank shafts in a triangular arrangement, as you say, hence Deltic from Greek Delta.
Usually in a bank of 6 giving 18 cylinders....

Also used in Dark class fast patrol boats.
And Ton class minesweepers.

The roots of the design go back into the early 1940's when an Admiralty Committee were looking for a high speed lightweight diesel engine such as the German E Boats were using. Given that Napier were busy developing a 24 cylinder "H" layout aero engine for the Hawker Typhoon, it took some time before the Deltic engine reached production. One of the original specifications called for the use of non magnetic alloys in its construction, with a view to installation in minesweepers.

Roy.
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