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Subject: RE: [FlyRotary] Re: flyrotary_Web_Archive
Date: Mon, 18 Apr 2005 13:08:37 -0500
Message-ID: <87DBA06C9A5CB84B80439BA09D86E69EC081E2@MAIL01.austin.utexas.edu>
Thread-Topic: [FlyRotary] Re: flyrotary_Web_Archive
Thread-Index: AcVEP9qzZcEec0o6SLmqnJQe8kD0tgAAJBWA
From: "Mark R Steitle" <mark.steitle@austin.utexas.edu>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>

Ernest,
I built a filter box for my Lancair ES using a similar design
(flat-pleated filter) for Ford 5.0 HO application.  Without realizing
it, I have designed in a trap to separate larger particles as you have
described.  It also has a flap for ram air at higher altitudes & speeds.
I carved the mold out of blue foam, then glassed over it.  Once cured, I
removed the foam.  Probably not a task for the fiberglass challenged
builder, but not all that difficult to do either. =20

Mark S. =20

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of echristley@nc.rr.com
Sent: Monday, April 18, 2005 12:55 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: flyrotary_Web_Archive


>(2) Is a new idea, I'm sure you've all seen those new=20
> cyclonicfilter free vacuum cleaners, that always maintain 100%=20
> suction, or so they
> say. Could an air plenum be designed on the same principle so that=20
> dust and
> gravel get separated from the main airflow and get ducted out a=20
> side tube,
> leaving the main air stream to go to the engine.
> Just ideas guys,
> Michael.
>

Not such a new idea, Michael, but a good one nonetheless.  I've got a
buddy here with a Quickie that uses this technique.  The air comes in
and has to travel around a radius under the cowl.  The engine picks up
air from inside the radius, and the extra exits at the rear of the curve
through an opening that blows across the engine.

I have enough room that I'll use the technique that Chrysler used in my
Dakota pick-up.  The air comes into a large box, with a large, flat,
pleated filter covering the top.  Air comes into the box and slows down.
Heavy stuff drops to the bottom, and engine air get sucked out the top.
I have to vacuum a few tablespoons of sand out of the box whenever I
change the filter, and I don't do any off-roading.


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