Mailing List flyrotary@lancaironline.net Message #35740
From: Thomas y Reina Jakits <rijakits@cwpanama.net>
Subject: Re: [FlyRotary] cowl openings for water radiators
Date: Mon, 26 Feb 2007 12:56:24 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Question is not the exact size, but what kind of ducting you use?
How do you exhaust the heated air?
Do you use aumentation/cowl-flaps??
 
Thomas
----- Original Message -----
Sent: Monday, February 26, 2007 12:12 PM
Subject: [FlyRotary] cowl openings for water radiators

What size openings do I need for the water radiators?   The Wittman Tailwind cowl I have has postal slots of 3' x 7 3/4" , which is   approx. 22 1/4 sq in. on each side.  Sam James for the 160 Lycoming is using 4 3/4' round holes which are 17.6 sq. inches on each side.  My radiators are quite close to the opening and I plan on making the diffusers trumpet shaped, will the openings be large enough if I can stay over 20 sq. inches on each side with a decent trumpet shape.  JohnD       hushpowere II on order - hope to start in 2 weeks if weather cooperates.


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