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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-320236@logan.com>
Subject: Re: [FlyRotary] New Scoop
Date: Tue, 13 Jul 2004 18:56:18 -0400
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Looks like it should certain pull in the air, Steve.

Getting it out of the boundary layer is bound (no pun intended) to help.  I
have flow for over 1 1/2 years with a total of 57 sq inches of intake for
both radiators and oil cooler with no cooling problems.  My cruise temps are
around 170-180F depending on OAT.  So I would think your 54 sq inches or
more should do the job.

Ed


Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message ----- 
From: "Steve Brooks" <steve@tsisp.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Tuesday, July 13, 2004 4:28 PM
Subject: [FlyRotary] New Scoop


> Ed, and others -
>
> Attached are some photos of the new scoop I'm building to replace my old
new
> scoop.  As you can see the new one actually has less intake area, but
> extends further in order to get outside of the boundary layer.
>
> I don't want the intake any larger than it has to be, but I want to make
> sure also that it is sufficient to allow for enough air flow.  My old new
> scoop did improve cooling, but as I found out, it was only marginal.
>
> The new scoop, which is patterned after a P51 style scoop, not only gets
> outside of the boundary layer air, but also excludes it, with the dam that
> you see at the bottom.  Well, actually it will be at the top, once it is
> mounted under the belly.  It also gives me an expansion area once inside
the
> scoop.
>
> Using the program that Al sent me, the boundary area calculated out to
about
> 1.625-1.75 inches +/- depending on speed.
>
> The scoop intake measures 10.75" inside at the top (narrowest) and 14.75"
at
> the widest point average = 12.75"
> Height of the inside of the scoop measures 4.25"
> This should equal about 54.18 sq in of area.
>
> The inside of the scoop sits exactly 2" from the bottom of the fuselage,
and
> overall height to the outside of the scoop is about 6.6"  again, measured
> from the fuselage bottom.
>
> I haven't glassed the scoop yet, other than on one side to help with
gluing
> it together.
>
> I am interested in any feedback concerning the size of the intake area.
>
> Regards,
>
> Steve Brooks
> Cozy MKIV N75CZ
> Turbo Rotary
>


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