Hi Paul,
Firstly I will not be going to Oshkosh this year as I have decided to
make the Mustang 2 fly before Christmas. The weeks lost are important to
achieve my goal.

Paul I have carried out many test today and have built many intake ducts
shapes and size to achieve the best result. To achieve a cooling system
that works with a horizontal radiator we need to build the streamline
duct as per the Kays and London dwgs. I have tested many shapes and
sizing today with the end result back to the results from Kays and
London. The wedge shape produces outlet velocity as per the wedge with
the highest value at the small end to almost 0 at the large end. I have
made many ducts and the best is an S that go's through the straight line
of the wedge line. This has given air flow through the core with equal
distribution but a 10% increase over the total area for the same
input.

Paul I will try to do another dwg to enplain this. My numbers do
match the Kays and London but prove the shapes are right. I think the
reason why the numbers don't match is they where done on the Mustang
Spitfire and 109 where the airspeeds and climb rate is different.

Paul I
hope you can follow this. It is hard for me to put all I have found in
words but I will ring you if you think it is needed. In conclusion for
our slower climb out speeds of say 90 knot we need to build the
streamlined diffuser as the conventional diffuser is not good for our
speed range.
Regards Don

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Sorry to hear you are not coming to OSH.

Well Don I discussed it with Robin and we have decided to visit you, Ian and  all
you guys in WA  again to see what you guys  are up to and perhaps help. Robin loves to travel anywhere at a moments notice.  When is the question. Probably after OSH.

Paul Lamar