Tony, no we are trying to do what Ed said in his last email. The shape of the duct has to actually slow the air down.
As far as I know, the streamlined duct is the optimal shape ... trying to achieve it in a practical application isn't always so easy ... you have to account for inlet size, radiator dimensions, distance from inlet to radiator face, etc, in general a long diffuser is better; the curve says the diffuser length should be 2.5 times radius of cooler face.
Jeff

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of tonyslongez@cox.net
Sent: Tuesday, January 12, 2010 12:26 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Scoops

Jeff

Aren't we just stalling the air? As if in a high AOA? and if so can't we optimize that with different diffuser airfoils?

Tony

This message, and the documents attached hereto, is intended only for the addressee and may contain privileged or confidential information. Any unauthorized disclosure is strictly prohibited. If you have received this message in error, please notify us immediately so that we may correct our internal records. Please then delete the original message. Thank you.