X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: <13brv3@bellsouth.net> Received: from imf17aec.mail.bellsouth.net ([205.152.59.65] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 980009 for flyrotary@lancaironline.net; Tue, 31 May 2005 21:25:09 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.65; envelope-from=13brv3@bellsouth.net Received: from ibm57aec.bellsouth.net ([65.6.194.9]) by imf17aec.mail.bellsouth.net with ESMTP id <20050601012423.MNNC13483.imf17aec.mail.bellsouth.net@ibm57aec.bellsouth.net> for ; Tue, 31 May 2005 21:24:23 -0400 Received: from rd ([65.6.194.9]) by ibm57aec.bellsouth.net with ESMTP id <20050601012423.FRTJ25470.ibm57aec.bellsouth.net@rd> for ; Tue, 31 May 2005 21:24:23 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] A little clarification... Date: Tue, 31 May 2005 20:24:48 -0500 Message-ID: <00d501c56648$b35333a0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00D6_01C5661E.CA7D2BA0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_00D6_01C5661E.CA7D2BA0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable What is the difference in the 4 port and 6 port Renesis, and why should = I choose the one that I should choose? Hi Bill, =20 The 6 port engine is literally two extra intake ports, that are opened = and closed by a sadistic array of gizmos on the stock intake. For our = purposes, it's unlikely these will be controlled, but rather left open. Bottom = line, the 6 port can have more intake porting area (think larger or a higher number of valves on a piston engine). Even in the stock engine, I don't believe the extra ports are opened until something like 8000 rpm, so there's reason to believe we don't need the extra ports at our rpms. There's certainly still debate on this, so don't feel bad if you don't = know which one to choose. =20 What does P Port mean and how is it different from the normal port? = Does the Renesis (either one) have a P Port and should it be modified to have = one put in it? As John explained, it's a peripheral port, which uses a big hole in the = side of the rotor housing as an inlet, rather than the 4 or 6 ports were were just discussing. I firmly believe that p-ports have more negatives than positives for our usage, and no one that I've heard of has actually done = a p-port on a Renesis, though I'm sure someone will :-) =20 I would like to build a plane and fly it. Low on the build and high on = the fly part. I am not interested in doing R&D or starting a business = building parts. An honest understanding of your goals puts you ahead of a lot of folks already. My advice would be to follow as closely as possible to what = folks like Tracy, Ed, and Bill Eslick are doing. If you want a near = guarantee, buy your engine from Bruce Turrentine, EC-2 and EM-2, and RD-1C redrive = from Tracy, motor mount from CCI, and hope the prefabbed intakes and exhaust systems appear before you need them. Cooling, fuel systems, etc will = come naturally when you read a few thousand emails :-) =20 I know that this sound really critical, but I don't mean it to be. Honest questions and concerns are not a problem here. Ask anything you = need to. =20 Cheers, Rusty Mazda 13B rotary powered RV-3 (flying) Kolb Slingshot (Mazda single rotor project) Sonerai-IIL (just won't go away) =20 ------=_NextPart_000_00D6_01C5661E.CA7D2BA0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

What is the difference in the 4 port and 6 port = Renesis, and why=20 should I choose the one that I should choose?

Hi=20 Bill,
 
The 6 = port engine is=20 literally two extra intake ports, that are opened and closed by a = sadistic array=20 of gizmos on the stock intake.  For our purposes, it's unlikely = these will=20 be controlled, but rather left open.  Bottom line, the 6 port can = have more=20 intake porting area (think larger or a higher number of valves on a = piston=20 engine).  Even in the stock engine, I don't believe the extra ports = are=20 opened until something like 8000 rpm,  so there's reason to believe = we=20 don't need the extra ports at our rpms.  There's certainly = still=20 debate on this, so don't feel bad if you don't know which one = to=20 choose.   

What does P Port mean and how is it different from the normal = port? =20 Does the Renesis (either one) have a P Port and should it be modified to = have=20 one put in it?

As John explained, it's a = peripheral=20 port, which uses a big hole in the side of the rotor housing as an = inlet, rather=20 than the 4 or 6 ports were were just discussing.  I firmly believe = that=20 p-ports have more negatives than positives for our usage, and no one = that I've=20 heard of has actually done a p-port on a Renesis, though I'm sure = someone will=20 :-)  

I would like to build a plane and fly = it. =20 Low on the build and high on the fly part.  I am not interested in = doing=20 R&D or starting a business building parts.

An honest understanding = of your goals=20 puts you ahead of a lot of folks already.  My advice would be to = follow as=20 closely as possible to what folks like Tracy, Ed, and Bill Eslick are=20 doing.  If you want a near guarantee, buy your engine from Bruce=20 Turrentine, EC-2 and EM-2, and RD-1C redrive from Tracy, motor mount = from CCI,=20 and hope the prefabbed intakes and exhaust systems appear before you = need=20 them.  Cooling, fuel systems, etc will come naturally when you = read a=20 few thousand emails :-)  

 I know that = this sound=20 really critical, but I don't mean it to be.

Honest questions and = concerns are not a=20 problem here.  Ask anything you need to. 

Cheers,
Rusty
Mazda 13B = rotary powered=20 RV-3 (flying)
Kolb = Slingshot (Mazda=20 single rotor project)
Sonerai-IIL (just won't go=20 away)

 

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