The following link:

http://www.melmoth2.com/texts/NACA%20inlet%20sizing.htm

found its way into the discussion of inlet sizes and lip shapes.
Actually, that link goes to a discussion of NACA flush inlet sizing; the
link to the part of my website where I discuss my cooling efforts is:

http://www.melmoth2.com/texts/Cooling flow.htm

Also, when Sandy McNabb offered some inlet lip shapes and asked which I
liked best, my choices were limited by the selection. Actually, I think
I like something that looks a bit more like the leading edge of a
23000-series airfoil. But the fact that I like it should not be taken as
a very strong endorsement. I suspect there must be a NACA report
available online that discusses optimum handling of inlet spillage. One
has merely to find it.

Peter Garrison