The paper will cost you thirty bucks to read:
https://www.sae.org/publications/technical-papers/content/2014-01-1187/

Ray -- that big ugly gear is the flywheel (handsome is as handsome does).
The pistons are synchronized as though they were reflections in a mirror.

Al -- seems to me you're lacking some essential characteristics of the
Deltic.  This is more like a Fairbanks-Morse submarine/locomotive engine,
no?

Yrs,
d