X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [207.30.253.2] (HELO access) by logan.com (CommuniGate Pro SMTP 5.1.9) with ESMTP id 2109275 for flyrotary@lancaironline.net; Mon, 18 Jun 2007 11:08:49 -0400 Received-SPF: softfail receiver=logan.com; client-ip=207.30.253.2; envelope-from=unicorn@gdsys.net Received: from main (gdsi-54.gdsys.net [207.30.255.54]) by access (Rockliffe SMTPRA 4.5.6) with SMTP id for ; Mon, 18 Jun 2007 10:04:41 -0500 Message-ID: <002901c7b1ba$7f1ed930$36ff1ecf@main> From: "Richard Sohn" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Fw: Different Rotary Port configurations Date: Mon, 18 Jun 2007 10:08:13 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0026_01C7B190.94E326B0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0026_01C7B190.94E326B0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I am not the fastest one myself, but sometimes I win. Richard Sohn N2071U ----- Original Message -----=20 From: Mark Steitle=20 To: Rotary motors in aircraft=20 Sent: Monday, June 18, 2007 8:12 AM Subject: [FlyRotary] Re: Fw: Different Rotary Port configurations Thanks Richard for the clarification. =20 Mark S. (Looks like I should have typed a little faster.) =20 On 6/18/07, Mark Steitle wrote:=20 Well Ed,=20 It looks like you've got yourself a new intake project. Didn't = Richard Sohn try running side and peripheral intake porting on his one = rotor? I vaguely remember him mentioning it and that he abandoned the = idea. I think it had something to do with the complexity of the dual = runners and that he was satisfied with the idle characteristics of the = p-port? Maybe Richard can comment?=20 Mark S. =20 On 6/17/07, Ed Anderson wrote:=20 Ok, here's the answer to my question. The second image shows a = three barrel carb with the primary going to two side intake ports and = the secondary going to the Peripheral ports. Interesting concept.=20 Ed ----- Original Message -----=20 From: Ed Anderson=20 To: Rotary motors in aircraft=20 Sent: Sunday, June 17, 2007 10:15 PM Subject: Different Rotary Port configurations =20 Ok, getting a bit quite again. Here is something that some of you = may find interesting. Its a graph comparing the possible different port = configurations for the Rotary engine. The top graph shows the intake and exhaust port opening for a = engine with a peripheral intake and peripheral exhaust - such as a 13B = which has been converted to a PP intake. The trapezoidal shapes show the port area. For example on the = first graph the first rectangular area entitled PORT shows the = Peripheral exhaust port open at 63Deg ATDC. There are two trapezoid = areas shown for the Peripheral intake. A "P" which I presume stands for = Primary and a much larger P+S which I presumes stands for a combined = primary and Secondary port. Although, I do not ever recall a PP with = two tubes one for primary and one for secondary. So there may be = another explanation.=20 The second graph is our traditional 13B with sideport intake and = peripheral port exhaust. Here the intake timing for the intake is that = of the NA 13B although it shows the intake opening a bit later than the = stock 13B but closing at the stock 40 deg ABDC.=20 If you look at the area under the first graphs "P" trapezoid it = appears to be open much longer than the P for the side port intake (2nd = graph), but the trapezoid is not as high. Wonder what that signifies? = Open longer but not as large a port area?=20 Anyhow, thought some of you might find it interesting. =20 Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com=20 http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.dmack.net/mazda/index.html -- Homepage: http://www.flyrotary.com/=20 Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html=20 -------------------------------------------------------------------------= ----- No virus found in this incoming message. Checked by AVG Free Edition.=20 Version: 7.5.472 / Virus Database: 269.9.0/852 - Release Date: = 6/17/2007 8:23 AM ------=_NextPart_000_0026_01C7B190.94E326B0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I am not the fastest one myself, but = sometimes I=20 win.
 
Richard Sohn
N2071U
 
 
----- Original Message -----
From:=20 Mark = Steitle=20
Sent: Monday, June 18, 2007 = 8:12 AM
Subject: [FlyRotary] Re: Fw: = Different=20 Rotary Port configurations

Thanks Richard for the clarification.
 
Mark S.
(Looks like I should have typed a little faster.)
 
On 6/18/07, Mark=20 Steitle <msteitle@gmail.com>=20 wrote:=20
Well Ed,
It looks like you've got yourself a new intake project.  = Didn't=20 Richard Sohn try running side and peripheral intake porting on his = one=20 rotor?  I vaguely remember him mentioning it and that he = abandoned=20 the idea.  I think it had something to do with the = complexity of=20 the dual runners and that he was satisfied with the idle = characteristics of=20 the p-port?  Maybe Richard can comment?
 
Mark S.

 
On 6/17/07, Ed=20 Anderson <eanderson@carolina.rr.com > wrote:=20
Ok, here's the answer to my = question.  The=20 second image shows a three barrel carb with the primary going to = two side=20 intake ports and the secondary going to the Peripheral = ports. =20 Interesting concept.
 
Ed
----- Original Message -----=20
From: Ed = Anderson=20
Sent: Sunday, June 17, 2007 10:15 PM
Subject: Different Rotary Port = configurations

 
Ok, getting a bit quite again.  Here = is=20 something that some of you may find interesting.  Its a graph = comparing the possible different port configurations for the = Rotary=20 engine.
The top graph shows the intake and exhaust = port=20 opening for a engine with a peripheral intake and peripheral = exhaust -=20 such as a 13B which has been converted to a PP = intake.
 
The trapezoidal shapes show the port = area.  For=20 example on the first graph the first rectangular area entitled = PORT shows=20 the Peripheral exhaust port open at 63Deg ATDC.  There are = two=20 trapezoid areas shown for the Peripheral intake.  A "P" which = I=20 presume stands for Primary and a much larger P+S which I presumes = stands=20 for a combined primary and Secondary port.  Although, I do = not ever=20 recall a PP with two tubes one for primary and one for = secondary.  So=20 there may be another explanation.
 
The second graph is our traditional 13B = with=20 sideport intake and peripheral port exhaust.  Here the intake = timing=20 for the intake is that of the NA 13B although it shows the = intake=20 opening a bit later than the stock 13B but closing at the stock 40 = deg=20 ABDC.
 
If you look at the area under the first = graphs "P"=20 trapezoid it appears to be open much longer than the P for the = side port=20 intake (2nd graph), but the trapezoid is not as high.  Wonder = what=20 that signifies? Open longer but not as large a port area? =
 
Anyhow, thought some of you might find it=20 interesting.   
 
 
Ed Anderson
Rv-6A N494BW Rotary=20 Powered
Matthews, NC
eanderson@carolina.rr.com
http://members.cox.net/rogersda/rotary/configs.htm#N494BW=
http://www.dmack.net/mazda/index.html

--
Homepage:=20  http://www.flyrotary.com/=20
Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.htm= l=20




No virus found in this incoming message.
Checked by AVG Free = Edition.
Version: 7.5.472 / Virus Database: 269.9.0/852 - Release = Date:=20 6/17/2007 8:23 AM
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