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
The message is ready to be sent with the following
file or link attachments:
Inclined Radiators.doc
Note: To protect against computer viruses, e-mail programs may prevent sending
or receiving certain types of file attachments. Check your e-mail
security settings to determine how attachments are handled.