Joe Hull wrote:

It was bugging me that I couldn’t remember the reference to the reverse scoop – so here’s the link – it was Dick Rutan:

http://www.ez.org/cp47-p11.htm

 

Essentially put the reverse scoop on the top of the wing all the way ahead of the oil cooler for best cooling.

 

Joe Hull

Cozy Mk-IV N31CZ (65 hrs - Rotary 13B NA)

Redmond (Seattle), Washington

 

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Thanks, Joe.  I was trying to remember where I'd seen that.  In the meantime, I drew the attached drawing from memory of what I'd gleaned from it, back-whenever.

Al's scoop exit appears to be too much shrouded.  Something closer to this is more likely to get maximum airflow.

Dale R.