Mailing List flyrotary@lancaironline.net Message #50743
From: Tracy Crook <tracy@rotaryaviation.com>
Sender: <rwstracy@gmail.com>
Subject: Re: [FlyRotary] Re: Tuned lengths
Date: Fri, 2 Apr 2010 11:05:57 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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


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