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From: <Bahahud@aol.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, December 06, 2003 11:37 AM
Subject: [FlyRotary] Re: K&M and Thick Radiators
A tip on thick radiators.
I used 2 AC evaporator cores out of Lincoln town cars.
I did not seal the grooves at the end of the radiators but just allowed
the
aluminum air ducts to ride onthe edges leaving small air passages at each
section.
The result was 240 Deg. F. coolant temp. in climb.
I then sealed these openings with RTV and in a full power climb to 3000
ft. i
saw 180 Deg. F. coolant temps.
The thick radiators MUST have sufficient stratic pressure to work
properly.
Hank H.
Agree, Hank. I've seen somewhere an estimate that a hole in a plenum with a
total area of approx 1/2" and you can lose 20% of your air mass cooling
effectiveness. So seal those plenums. I have fiberglass plenums that are
sealed to the core face inside with foam weather striping. It do make a
difference.
Ed Anderson
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