flyrotary@lancaironline.net Mailing List Archive

Ed; Thanks for the numbers. Last night I read the article in kit planes, Oct 99, by Barnaby Wainfan on duct work and his article entitled wind tunnel said that you need a duct behind the coolers to offset the drag of the air in the cowling. Has anyone done any practical applications on this (for Mazdas), or is the air from the coolant and oil radiators just dumped into the cowling. My very limited understanding of this, tells me that drag means more fuel needed. Any and all comments welcome. JohnD From the farm

----- Original Message -----

From: Ed Anderson

To: Rotary motors in aircraft

Sent: Monday, December 12, 2005 9:20 PM

Subject: [FlyRotary] Re: oil cooler opening

John,

The area of my oil cooler opening is 22-24 sq inches about 10" wide and 2 1/2" high. I don't have the exact dimension handy, but its opening is approx 3-4" back of the prop flange. So far its worked fine for about 5 RVs that I am aware of using this approach.

Ed

----- Original Message -----

From: John Downing

To: Rotary motors in aircraft

Sent: Monday, December 12, 2005 5:04 PM

Subject: [FlyRotary] oil cooler opening

Ed; What is the opening area and the distance behind the prop for the oil cooler inlet. I'm wondering if the opening needs to be as near the prop as the inlets for the radiators. Thanks in advance. JohnD Had to cancel the insurance on the ole Colt today and put comp. on - snowed in for the winter in northern Michigan.