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Message-ID: <u2m1b4b137c1004020805o8f2088b3mc55e00043dd08d81@mail.gmail.com>
Subject: Re: [FlyRotary] Re: Tuned lengths
From: Tracy Crook <tracy@rotaryaviation.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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It only takes experiencing the effect of intake tuning one time to convince
you of its value.  Curves, as long as they are constant in cross section,
don't have corners and have relatively smooth walls don't effect the tuning
effects at all.  (Think brass musical instrument)

Tracy

On Fri, Apr 2, 2010 at 10:53 AM, <jrhopkins@windstream.net> wrote:

> somehow i think that a tuned intake is irrelevant.  when i look at the
> intakes all i see is turbulence with all the curves.  air is a liquid, just
> like water, and it wants to go straight.  is not turbulence going into the
> engine intake orfice a good thing for mixing the fuel spray?  it would seem
> that the only real help would be compressing the air, and that helps exhaust
> noise as well if you use a turbocharger.  also, why complicate things by
> using two or three air valves when one in the large intake will do.  is it
> hard on a rotary to have slightly different manifold pressures to 2 or more
> rotars?  devils advocate am i.  thanks
>
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:
> http://mail.lancaironline.net:81/lists/flyrotary/List.html
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It only takes experiencing the effect of intake tuning one time to convince=
 you of its value.=A0 Curves, as long as they are constant in cross section=
, don&#39;t have corners and have relatively smooth walls don&#39;t effect =
the tuning effects at all.=A0 (Think brass musical instrument)=A0 <br>
<br>Tracy=A0 <br><br><div class=3D"gmail_quote">On Fri, Apr 2, 2010 at 10:5=
3 AM,  <span dir=3D"ltr">&lt;<a href=3D"mailto:jrhopkins@windstream.net">jr=
hopkins@windstream.net</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_=
quote" style=3D"margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, =
204, 204); padding-left: 1ex;">
somehow i think that a tuned intake is irrelevant. =A0when i look at the in=
takes all i see is turbulence with all the curves. =A0air is a liquid, just=
 like water, and it wants to go straight. =A0is not turbulence going into t=
he engine intake orfice a good thing for mixing the fuel spray? =A0it would=
 seem that the only real help would be compressing the air, and that helps =
exhaust noise as well if you use a turbocharger. =A0also, why complicate th=
ings by using two or three air valves when one in the large intake will do.=
 =A0is it hard on a rotary to have slightly different manifold pressures to=
 2 or more rotars? =A0devils advocate am i. =A0thanks<br>

<font color=3D"#888888"><br>
<br>
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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>
</font></blockquote></div><br><div style=3D"visibility: hidden; display: in=
line;" id=3D"avg_ls_inline_popup"></div><style type=3D"text/css">#avg_ls_in=
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