We have an initial picture of the evolution from Packard engines towards Liberty. Naturally it is from Packard's point of view since we know that Hall-Scott also intervened (see main text).

-This line of engines breaks with the concept of placing the cylinder rows (in this case they cannot be called cylinder blocks, as they are individual) at a different angle than the one that appears as a geometric angle to coincide with the ignition angle (720 : 12 = 60 for a V12)

-In another section of this publication and in the author's Blog <Aerospace engines.blogspot.com>, it is mentioned that Liberty engines had a lot of vibrations for that reason and that the crankshafts could not bear it.

-We see that the Packard predecessors to the Liberty were also irregular in that aspect: the V8 at 60° instead of 90°. The Packard V12s at 40° instead of 60° and finally the Liberty at 45° instead of 60°.

-This "aberration" is corrected by letting the crankshaft bearings for the connecting rods not coincide regularly either.

"Cut out from a magazine of the time"