Some of the ferries on San Francisco Bay were also single-cylinder. When an engine stopped on dead center it was necessary to open a door on the inside of the paddle wheel enclosure, insert a lever into the paddle wheel, and pry it enough to start.
Wasn't the first fire pump truck with a Deltic built in the 1960s? I recall that the basic idea was hatched by William F. Gibbs, arguably America's greatest marine architect and a firefighting buff. The idea was a pumper capable of navigating the twisty little streets in lower Manhattan and then pushing water from hydrants hard enough to pour out at high pressure eighty stories up. Mr. Gibbs was also noted for, among other things, the Liberty Ship design and the love of his life, SS United States.