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Message-ID: <1b4b137c0803090856w29e5955akf0242ef58d01a04e@mail.gmail.com>
Date: Sun, 9 Mar 2008 11:56:28 -0400
From: "Tracy Crook" <tracy@rotaryaviation.com>
Sender: rwstracy@gmail.com
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Incline Radiators
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I'm betting that this is probably true (angle not a big factor) since my
RV-8 installation has a duct angle to rad of about 90 degrees. It cools on
the ground at power levels high enough for level flight so I'm hopeful.  As
usual, the duct is everything.  The duct MUST be tailored to the angle and
that tailoring gets more difficult with increasing angles.

Tracy (resisting the urge to buy a Versys)

On Sun, Mar 9, 2008 at 11:44 AM, Bobby J. Hughes <bhughes@qnsi.net> wrote:

>  <<DSCF0462.JPG>>
>
> Te <<DSCF0460.JPG>> sting at NAWTF (North Austin Wind Tunnel Facility):)
> last year determined the radiator angle made almost no difference with
> this duct. Dennis H. and I measured the airspeed on the backside of the
> core at several angles. Do not have the data handy but we observer about
> a 1 mph difference across all the angles we tested.  What was
> interesting was the airspeed deceleration in this crude NACA duct. From
> entrance to the non-existent lip the airspeed dropped by 1/3.
>
> Bobby
> (pics for your amusement)
>
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:
> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>
>

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<div>I&#39;m betting that this is probably true (angle not a big factor) since my RV-8 installation has a duct angle to rad of about 90 degrees.&nbsp;It cools on the ground at power levels high enough for level flight so I&#39;m hopeful.&nbsp; As usual, the duct is everything.&nbsp; The duct MUST be tailored to the angle and that tailoring gets more difficult with increasing angles.&nbsp;&nbsp;</div>

<div>&nbsp;</div>
<div>Tracy (resisting the urge to buy a Versys)<br><br></div>
<div class="gmail_quote">On Sun, Mar 9, 2008 at 11:44 AM, Bobby J. Hughes &lt;<a href="mailto:bhughes@qnsi.net">bhughes@qnsi.net</a>&gt; wrote:<br>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">&nbsp;&lt;&lt;DSCF0462.JPG&gt;&gt;<br><br>Te &lt;&lt;DSCF0460.JPG&gt;&gt; sting at NAWTF (North Austin Wind Tunnel Facility):)<br>
last year determined the radiator angle made almost no difference with<br>this duct. Dennis H. and I measured the airspeed on the backside of the<br>core at several angles. Do not have the data handy but we observer about<br>
a 1 mph difference across all the angles we tested. &nbsp;What was<br>interesting was the airspeed deceleration in this crude NACA duct. From<br>entrance to the non-existent lip the airspeed dropped by 1/3.<br><br>Bobby<br>(pics for your amusement)<br>
<br><br>--<br>Homepage: &nbsp;<a href="http://www.flyrotary.com/" target="_blank">http://www.flyrotary.com/</a><br>Archive and UnSub: &nbsp; <a href="http://mail.lancaironline.net:81/lists/flyrotary/List.html" target="_blank">http://mail.lancaironline.net:81/lists/flyrotary/List.html</a><br>
<br></blockquote></div><br>

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