Oddball Engine of the Day - The Napier Deltic Diesel

Designed and produced by the British company D. Napier and Sons in the years following WWII.  It was designed to replace the gasoline engines then used in PT Boats.  Compact & lightwieght, (1/5 of a contemporary diesel)  the Deltic was an ideal design for high speed marine use and had considerable success in that application.  Napier Deltics also saw some limited use as a locomotive engine.  Because of it's compact dimensions and subsequently low magnetic signature, it is still being used to power British minesweepers.