New UCW project

[Petr Brezina]

I think that all this is mainly about the airflow.
On the older Marks there were relatively big intakes, but small or badly placed "exhausts", which caused that hot air couldn't escape fast enough.
I believe that evolution of the air ducts and engine covers on Mk.IIIs should fix that. They removed air ducts, but added a massive grill to the rear. With the slightly bigger intake hole in the divisional plate it should guarantee the optimal airflow through the engine compartment.
Coolers and all the rest remains the same.

[Lynn Eades]

Petr, my AOP at serial 84xxx (which is much earlier than your MKIII) still has the two holes in the rear lower hull. It then had a bolted on duct that took the air flow to vertical up through the rear deck via a chimney with a closeable baffle.
I'm not sure how it was used- I guess it was to keep the snow out, at which time the total air flow exited via the rear vented engine cover.

[Petr Brezina]

Cooler and shroud fitted, now is time for the fan extension.