Hi Paul,
I did some test on my radiator cooling air flow. I used a blower and
wind speed instrument. The results are interesting but adding credit to
Kay's of London.
I have attached some photos for you to view. This test has proved that I
need to bend the duct down over the radiator to increase pressure in the
front and use a radius on the front leading edge.
What do you think.
Regards Don

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Yep Kays & London works. How thick is that rad? 10 Kts does not seem
like as high a percentage of flow as I was getting with a 2 inch thick rad at 80 MPH.
I was seeing 40 MPH on the outlet side. OK I see the proplem.
the area of the blower outlet is much smaller than I was using.
What are the dimensions of the blower outlet?

I also think you need to curve the part over the rad so the duct is
not as high at the back as in this diagram "b" from K&L.

BTW I will indroduce you to Will James at OSH as he will probably
be doing a new cowl design for Mark's Mustang II.

Paul Lamar