X-Virus-Scanned: clean according to Sophos on Logan.com
Return-Path: <rwstracy@gmail.com>
Received: from mail-vw0-f52.google.com ([209.85.212.52] verified)
  by logan.com (CommuniGate Pro SMTP 5.3.8)
  with ESMTP id 4384190 for flyrotary@lancaironline.net; Wed, 07 Jul 2010 16:28:43 -0400
Received-SPF: pass
 receiver=logan.com; client-ip=209.85.212.52; envelope-from=rwstracy@gmail.com
Received: by vws11 with SMTP id 11so84596vws.25
        for <flyrotary@lancaironline.net>; Wed, 07 Jul 2010 13:28:05 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=gamma;
        h=domainkey-signature:mime-version:received:sender:received
         :in-reply-to:references:date:x-google-sender-auth:message-id:subject
         :from:to:content-type;
        bh=4uIQnvpvLHKg5ucd0kbflulT06vC8RLDKWdi05+ybXQ=;
        b=frwG8i/+psERvehB+4vfIhLh+M3cqsAA/JjCjzIY8A673e8mw7R2VF0UGPop1n3WN7
         F1X8qzkScFKu5t4jGIAI7moU0CIJKlVZV9i27be6yGMPtfASNqltymbzimRjlExYwjCe
         dNM0uhGvdoUELHBd/vjtldCY3nm1XaW4xtt2o=
DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=gamma;
        h=mime-version:sender:in-reply-to:references:date
         :x-google-sender-auth:message-id:subject:from:to:content-type;
        b=sI6EhrA4cbchuixfLrdx8gkn2UwS1v++fT2z7tUqsQa7ZiGDTEdSFhBjVx27n51gCS
         5nGHOTWj23HEz4dXRENyUa3Q2ACUfGlm6kmJHbXkYPjgk/vq5vrmxm+CLj/vQ82oBHHq
         XlNdDzKacrlkERS3t7XWJhqu3cbj6cssvA0N0=
MIME-Version: 1.0
Received: by 10.220.89.212 with SMTP id f20mr3663373vcm.260.1278534484686; 
	Wed, 07 Jul 2010 13:28:04 -0700 (PDT)
Sender: rwstracy@gmail.com
Received: by 10.220.90.141 with HTTP; Wed, 7 Jul 2010 13:28:04 -0700 (PDT)
In-Reply-To: <list-4384173@logan.com>
References: <list-4384173@logan.com>
Date: Wed, 7 Jul 2010 16:28:04 -0400
X-Google-Sender-Auth: 7pYb5P2VLyeaDhs00jxVl1vc06c
Message-ID: <AANLkTil73BdYmGXJRLUppjOsTb3ZyjsP0RspRWhx9vXM@mail.gmail.com>
Subject: Re: [FlyRotary] intake design
From: Tracy Crook <tracy@rotaryaviation.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Content-Type: multipart/alternative; boundary=001636310789caf8bc048ad201b3

--001636310789caf8bc048ad201b3
Content-Type: text/plain; charset=ISO-8859-1

I think you violated most all the intake rules on this one.
The divider might help mixture distribution.
A smooth transition would be better for performance.
I don't see much of a bell mouth at the end of those runners either.

Radical transitions are rarely a good thing in an intake system.

Tracy

On Wed, Jul 7, 2010 at 4:09 PM, kevin lane <n3773@comcast.net> wrote:

>  Hi kevin,
>    I'm going on a old memory that may be wrong but I seem to remember a
> picture of your manifold that looked like the two Webber barrels dumped into
> a common chamber.  If that is true, you should start over and keep the
> barrels separate, I.e., one to each rotor.  Even if this is not the reason
> for your mixture mismatch now it is the only way to go.
>
> Tracy
>
>
> here is my intake.  the bolts and silicon are gone because I had it
> welded.  should I simply cut it in half and weld a divider plate down the
> middle or devise something else?  the plenum box was the only easy
> transition I could come up with while keeping runner lengths optimal.  I
> guessed that it would create a good reflective wave also since the
> cross-section transition is radical.
>
> KevinLane Carpentry
> www.KevinLaneCarpentry.com
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:
> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>
>

--001636310789caf8bc048ad201b3
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

I think you violated most all the intake rules on this one.<br>The divider =
might help mixture distribution.<br>A smooth transition would be better for=
 performance.<br>I don&#39;t see much of a bell mouth at the end of those r=
unners either.<br>
<br>Radical transitions are rarely a good thing in an intake system. <br><b=
r>Tracy<br><br><div class=3D"gmail_quote">On Wed, Jul 7, 2010 at 4:09 PM, k=
evin lane <span dir=3D"ltr">&lt;<a href=3D"mailto:n3773@comcast.net">n3773@=
comcast.net</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin: 0pt 0pt 0pt 0.8ex; borde=
r-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">





<div bgcolor=3D"#ffffff">
<div>Hi kevin,<br>=A0=A0 I&#39;m going on a old memory that may be wrong bu=
t I=20
seem to remember a picture of your manifold that looked like the two Webber=
=20
barrels dumped into a common chamber.=A0 If that is true, you should start=
=20
over and keep the barrels separate, I.e., one to each rotor.=A0 Even if thi=
s=20
is not the reason for your mixture mismatch now it is the only way to=20
go.<br><br>Tracy=A0 </div>
<div><font face=3D"Comic Sans MS"></font>=A0</div>
<div><font face=3D"Comic Sans MS"></font>=A0</div>
<div><font face=3D"Comic Sans MS">here is my intake.=A0 the bolts and silic=
on=20
are gone because I had it welded.=A0 should I simply cut it in half and wel=
d=20
a divider plate down the middle or devise something else?=A0 the plenum box=
=20
was the only easy transition I could come up with while keeping runner leng=
ths=20
optimal.=A0 I guessed that it would create a good reflective wave also sinc=
e=20
the cross-section transition is radical.</font></div>
<div><font face=3D"Comic Sans MS"></font>=A0</div>
<div><font face=3D"Comic Sans MS">KevinLane Carpentry<br><a href=3D"http://=
www.KevinLaneCarpentry.com" target=3D"_blank">www.KevinLaneCarpentry.com</a=
></font></div></div>
<br>--<br>
Homepage: =A0<a href=3D"http://www.flyrotary.com/" target=3D"_blank">http:/=
/www.flyrotary.com/</a><br>
Archive and UnSub: =A0 <a href=3D"http://mail.lancaironline.net:81/lists/fl=
yrotary/List.html" target=3D"_blank">http://mail.lancaironline.net:81/lists=
/flyrotary/List.html</a><br>
<br></blockquote></div><br>

--001636310789caf8bc048ad201b3--