"Steve" wrote in message ...
There were several other V12s in WWII aircraft and later used in boats.

Packard and Allison come to mind.

The Packards were common in WWII PT boats.

I think Allison made W16, which had 4 banks of cylinders. I just saw some in
an old warehouse that belonged to a retired competition hydro boat builder.

Steve
s/v Good Intentions

Allison also made a W24. This was two V12s joined by a common gearbox.
No idea what they were used in. There's a picture of one in the book
Michigan Madman, by C.J. Potter. He used them (V12 and W24) in pulling
tractors.