X-Mozilla-Keys:                                                                                 
Bill Freeman wrote:

Wschertz@aol.com wrote:

One thing I noticed at Oshkosh about Tracy's installation, was that he did
not have any bug-splatters or carcasses on his radiators. None!  I think this
is trying to tell us something about the flow through the openings and the
radiators. There were splattered bugs on the rims of the openings of the

cowl.

1. Tracy uses a substantial pressure to force the air through the thick
cores, and a resultant low velocity.
2. The bugs must be being deflected to the side as they approach the opening.

Any other thoughts?
Bill

Wow Bill! I am impressed. That never occurred to me. Very interesting.
A sure fire way to tell if you have substantial external diffusion.

Paul,

This is very likely an indication of external diffusion.  I have been convinced
for some time that the "normal" fairly blunt AC nose with smallish intakes
can work
well precisely because it has substantial external diffusion, and that the
actual
intake air velocity just inside those inlets is probably much lower
than most would expect.  External diffusers are quite good if you already
have to
pay to slow down the air.

Bill

 
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