It is a rare diesel engine, designed for a wide application, including aeronautics.

-It is an axial engine, or barrel type (or revolver), with the cylinders around the main shaft, with the pistons driving sinuosidal discs that makes the drive shaft rotate.

"FairDiesel drive shaft"

"A cylinder with it ports"

"Assembly view"

From Appendix 10: Since November 1st, 2017 this company has changed its name to Covaxe.