Return-Path: <13brv3@bellsouth.net> Received: from imf22aec.mail.bellsouth.net ([205.152.59.70] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 592129 for flyrotary@lancaironline.net; Wed, 05 Jan 2005 09:24:15 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.70; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf22aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050105142345.DQAK2069.imf22aec.mail.bellsouth.net@rd> for ; Wed, 5 Jan 2005 09:23:45 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: RV-3 engine rebuild Date: Wed, 5 Jan 2005 08:23:54 -0600 Message-ID: <000001c4f332$2fc7bcb0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C4F2FF.E52F96A0" 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 V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C4F2FF.E52F96A0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable If you make your own, you will be controlling the overlap and the closing point. So the Pport will be = as tractable as you make it. Thanks for the info Lynn. I knew I could count on you to get me = thinking about this again. For the record, I don't think I'd consider this for = the RV-3 engine, because I don't want to make a long drawn out project out = of getting it back in the air, however I am considering it for the single rotor. =20 I guess my biggest question is what the benefit would be for us. If we shoot for making top power in the "low" 7000-7500 rpm range, will we = gain anything from the PP configuration? In other words, if you compare a = street port, to a tamed PP at 7500 rpm, will there be significantly more power = with the PP?=20 Thanks, Rusty (have housings, and boring bar) =20 ------=_NextPart_000_0001_01C4F2FF.E52F96A0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

If you make your own, you will
be controlling the = overlap and=20 the closing point. So the Pport will be as
tractable as you make=20 it.

Thanks for=20 the info Lynn.  I knew I could count on you to get me thinking = about this=20 again.  For the record, I don't think I'd consider this for the = RV-3=20 engine, because I don't want to make a long drawn out project out of = getting it=20 back in the air, however I am considering it for the single = rotor. =20

I guess my = biggest=20 question is what the benefit would be for us.  If we shoot for = making=20 top power in the "low" 7000-7500 rpm range, will we gain anything from = the PP=20 configuration?  In other words, if you compare a street port, to a = tamed PP=20 at 7500 rpm, will there be significantly more power with the=20 PP? 

Thanks,
Rusty (have housings, and boring = bar)

  

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