Hello Sycamore,
I did know that the Vengence had a Wright, and I'm sure my father also
knew that. Still I now recall him, when I mentioned harmonic balancer
problems, telling me about the Pratt & Whitney system. Two bronze (?) balls
in a circular arced container presumeably opposite the master con rod.
They could move about so as to conteract the unbalance inherent in the
Master/slave conrod setup. No idea how that works in a 2/3 row engine.
Maybe he did the Wright course as well.
I think like Danny he went where he was sent & fought the war they gave him.
Regards, John