Ed;
With admittedly
only a few minutes of study; I wouldn’t draw any conclusion from that report –
other than for that particular duct design, inclining the rad to a certain
point resulted in better flow characteristics. Perhaps a ‘correct’
design with a straight thru flow would be even better.
Al
-----Original
Message-----
From: Rotary
motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed Anderson
Sent: Saturday, March 08, 2008 7:13
AM
To: Rotary motors in
aircraft
Subject: [FlyRotary]
Emailing: Inclinded Radiators.doc
Here is an extract out of an
article on race car cooling that is very interesting about use of inclined
radiators. Unfortunately, I could not find any reference as to where
this information was derived from - but, if correct, is fairly
significant.
It basically states that inclining
a radiator from 0 deg to 20-30 deg will decrease cooling and increase drag -
not terribly surprising, however, the article continues saying that at approx.
55 dig of inclination the cooling effectiveness is 30% greater than a radiator
with no inclination and the drag is 20% less!!! Now I found that
surprising - but, then air flow does take surprising twists (no pun
intended).
While I find that
claim very interesting - I have not found any collaborating
documents. But, thought the group might find it
interesting
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