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From: "Steve Brooks" <steve@tsisp.com>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Re: Getting there
Date: Mon, 23 Aug 2004 19:24:08 -0400
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John,
Nice glass work. You've obviously done a lot of this. :)

Yes, Though I've been trying to forget it, I've done a little bit of
fiberglass work before.  Actually, I opt for fiberglass over aluminum, as it
is easier to form.

The evap cores look good, but my uninformed guess would be a lot of back
pressure ahead of the oil cooler duct and not enough flow to the cooler. It
might be better to take the air for the cooler from the back of the plenum.
Yea - I know you've put a lot of thought and work into this - just trying to
give you some alternatives if it doesn't work as hoped.


I made the duct for the oil cooler as streamlined as I could to help ensure
good airflow, and it opens up into a "trumpet" shaped plenum.  The center of
the scoop at the back is the junction of the two evaporator cores, so I had
to divert, potentially high pressure) air away from that junction anyways.

I also had two other reasons for the way I built it. First, I wanted to keep
the oil cooler forward of the main pulley.  Second, If I don't get
sufficient cooling to either the oil or coolant, I can simply cut off the
oil cooler plenum, and relocate it to the side of the cowling, and feed it
from an armpit scoop.  I can then easier glass over the resulting hole in
the main plenum, and remove the segmenting scoop that fed the oil cooler.
Plan 2B.

Regards,
Steve Brooks  (hoping to stop at plan 2A)