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X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: <13brv3@bellsouth.net> Received: from imf16aec.mail.bellsouth.net ([205.152.59.64] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 951551 for flyrotary@lancaironline.net; Fri, 20 May 2005 18:30:54 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.64; envelope-from=13brv3@bellsouth.net Received: from ibm58aec.bellsouth.net ([65.6.194.9]) by imf16aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050520223010.JTRJ7916.imf16aec.mail.bellsouth.net@ibm58aec.bellsouth.net> for ; Fri, 20 May 2005 18:30:10 -0400 Received: from rd ([65.6.194.9]) by ibm58aec.bellsouth.net (InterMail vG.1.02.00.01 201-2136-104-101-20040929) with ESMTP id <20050520223009.VPIY25991.ibm58aec.bellsouth.net@rd> for ; Fri, 20 May 2005 18:30:09 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Intermediate housing ports/porting Date: Fri, 20 May 2005 17:30:29 -0500 Message-ID: <01ac01c55d8b$86df0fd0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_01AD_01C55D61.9E0907D0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 This is a multi-part message in MIME format. ------=_NextPart_000_01AD_01C55D61.9E0907D0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable But that would happen only if the pressure coming from the throttle were less that the pressure at the rotor. How could the pressure at the rotor be less if it has been *sucking* in air? =20 When the intake starts on the second rotor, the suction will be enough = to at least reduce the amount of air that would have otherwise made it into = the first rotor. Then again, if the velocity of the air is high enough in = the combined primary runner, perhaps that would overcome the negative. It's just hard to say, but I'm not sure I'm willing to cut up my intake to = find out yet. =20 =20 Cheers, Rusty (getting behind, must type faster) ------=_NextPart_000_01AD_01C55D61.9E0907D0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

But that would happen only if the pressure coming from = the=20 throttle were
less that the pressure at the rotor. How could = the=20 pressure at the
rotor be less if it has been *sucking* in = air?

When the = intake starts=20 on the second rotor, the suction will be enough to at least reduce the = amount of=20 air that would have otherwise made it into the first rotor. Then = again, if=20 the velocity of the air is high enough in the combined primary runner, = perhaps=20 that would overcome the negative. It's just hard to say, but I'm = not sure=20 I'm willing to cut up my intake to find out yet. =

Cheers,

Rusty = (getting behind,=20 must type faster)

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