Carlos, the Chrysler had both an engine mounted mechanical supercharger
and a separately mounted turbo-supercharger. Which the P-47 had making
it the perfect candidate as a testbed.
The engine mounted supercharger/accessory section was partly responsible for
the
length of the engine. A smaller supercharger (smaller how?) would have
little effect on overall length.
The photos posted show how long it was and where the engine mounts are, mount it
to the same firewall as the Allison or Packard Merlin of a P-51/P-40 and it's going to
increase the length of the aircraft by over three feet, no way around it. In order to
prevent too much of a Pinnochio effect the forward fuselage structure, firewall
position etc., would have to be redesigned and moved aft, which leads to 'now where
do we put the stuff that had been in that space" and on and on ...
An IV-2220 wouldn't fit, so invent a new member of the family that could fit, maybe the
IV-1776, 20% smaller displacement but oh, the propaganda value of the number.
Note that 20% less displacement does not mean that the external dimensions would
decrease by the same factor - it aint' a 1 to 1 relationship.
