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Dennis,
You seem to be at the same point in installation as I. I'm putting the Renesis in an RV-8 using the James cowl. I'm trying to fit the radiator verticaly under the engine mount. That gives me space of about 8 1/2 by 19 1/2. Make the radiator 3.75 to 4 inches thick, and I should have enough cooling. Since I don't have about 50 inches in front of the radiator for the perfect streamlined diffuser, the question for me is which will be less drag, a shorter (about 20 inches) streamline, or tipping the radiator at an angle and using a wedge shape diffuser? In any case, I plan on having an exit duct also with a controllable exit.
Does anyone know the answer?
Chris
----- Original Message ----- From: "Ernest Christley" <echristley@nc.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Sunday, March 12, 2006 10:37 PM
Subject: [FlyRotary] Re: finding a radiator
Dennis Haverlah wrote:
My question is - will the air make the 75 degree turn and flow through the fins? If not - would turning vanes below the radiator make this configuration possible?
Dennis, a section in K&W book discusses this very issue. The short answer is "Yes". The long answer is that you have to be very careful how you design the duct face in front of the radiator. If you have their book, it's figure 12-12 on page 277.
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