Al Gietzen wrote:

Someone quite awhile back had asked me about the internal baffles that I
put in the rad scoop to get a fairly uniform flow distribution on the
radiator.  I now have the scoop off so took some pics.

This is my scoop for a Velocity (pusher) in-cowl radiator (one of two
rads, the other in the wing root).  It is an "armpit" scoop, and has an
area expansion that approximately follows the K&E expansion ratios.  But
because of the curvature, my flow tests confirmed that the laws of
inertia prevailed, and most of the flow went to the far end of the rad.
The two baffles I put in resulted in quite good flow distribution.

AL

 
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