Being an ex sea going Chief Engineer I sailed on a couple of ships with opposed piston 2 stroke diesel engines - built by Doxford of Sunderland.
Quite a balanced engine compared to normal large bore 2 role engines which would rattle the ship to death.
Also a Ex Chief, also sailed on Doxfords, the MAN engines were double acting, not opposed piston.
This was a piston with a combustion chamber above and below the piston.
A horrid thing to work on as anyone who sailed on the B&W disasters built by Harland and Wolf will attest.
They were prone to scavenge fires and crankcase explosions.
The world will not see their like again, at lest I hope not.
Jon the Chief
