Subject: Duct outlet
From: ACRE
Date: 6/10/2003, 9:22 AM

Joseph Berki wrote:

According to what I can understand from the oblique radiator paper on the
mirror site we should be using the parallel scenario with a straight wedge
shaped duct.  The opening would be 25% to 30% of the rad cooling area.  The
back side of the radiator dumps into the cowl and finds it's way out via
cowl flaps.  Is there any limitation on what can be on the back side of the
radiator?  I would like to funnel it through an augmenter and was concerned
about how much space behind the radiator is necessary to insure good flow
and not cause the air to back up.

Joe Berki
Limo Ez
motor mount

A very good understanding of that paper.
Well the augmentor, if done right, should help the back side as in theory
it sucks. At the higher cruise speeds it restricts the flow but you don't 
need so much flow unless you are going to race and run flat out. In that
case you might need an additional cowl opening with a cowl flap.

Paul Lamar
 
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