deltic

What you describe is the Junkers Jumo 204, and the Deltic design was allegedly directly inspired by it.

One thinks of what diesel wonders might be created by combining the Deltic design with electric forced induction.

The baby deltic was a more prosaic workhorse, the deltics delivered the 100mph Edinburgh London service for decades.

Your tolerances for a deltic were insane compared to what you had at the time for an off-the-shelf diesel.

The major breakthrough with the dynamics on the Deltic was the one contra rotating crank.

The deltic engines were very complex and costly to maintain but solved a problem arising from the transition away from steam.

I believe the deltic and mini deltic lived on in marine and power engineering outside of trains.

The shop down the road could not fabricate deltic parts so lead times were considerable.

The Napier Deltic (3 crankshafts!) and Junkers Jumo are two examples.

The Napier Deltic engine is the party piece in all this.

If you want sheer power, It's a Deltic every time.

The Napier Deltic has a very distinctive sound.

That "deltic" engine just for the water pumping is incredible, I'd never seen that cylinder layout before.

The type 55 "deltic" locomotives, named after army regiments used to do the east coast Edinburgh-London train run, there were 22 of them in service and one in the science museum London.

While several people have mentioned the Napier Deltic, there was also the Junkers Jumo 205 opposed-piston diesel aero engine of the early 1930s.

In its various naval, rail and other applications there were many different induction designs applied to the Deltic: turbos, superchargers and combinations of both.

Deltic engines were easily removed after breakdown, generally being sent back to the manufacturer for repair, although after initial contracts expired both the Royal Navy and British Railways set up their own workshops for overhauls.