Actually, they do not seem to vibrate unduly. There are some
 Fairbanks Morse submarine engines from WWII that have been converted
 to run on natural gas powering compressor stations. What ever
 vibration is as much or more from the compressor as from the engine.
 The local ones are six cylinder two stroke models. Compact size for
 the power developed.

 Dale Davies


 diesels never made it in the aircraft engine biz for long.
 Many if not all have tried starting with Packard in the 1930's.

 Paul

http://www.tugboatenthusiastsociety.org/Pages/tugmach-diesel-modern-FM.htm

Now Colt Industries Fairbanks Morse div.

The 38D8 1/8 OP in known around the world and was the prime mover on
many small ships. Submarines, and tug boats.
Many remote towns are still powered by salvaged OPs from WWII ships.
Fairly quiet, compared to a war, many came with the alternators attached
on a bed mount.
Run on anything. Easy to work on. Still in service on big ships as
electrical power gen sets. Parts available everywhere.
The two camshafts are used to drive the fuel pumps. Two pumps for each
cylinder. When I toured an attack sub years ago I saw my old friend in
the rear with its alternator attached. A number of cylinders can be
valved off for use as a  high volume compressor, or so I was told. It
could drive the sub on the surface should the Nuclear plant be disabled.
There were 8 of them on the Forrestal CVA 59,
My aircraft carrier.

Lynn E. Hanover