X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from an-out-0708.google.com ([209.85.132.246] verified) by logan.com (CommuniGate Pro SMTP 5.1.9) with ESMTP id 2109051 for flyrotary@lancaironline.net; Mon, 18 Jun 2007 09:13:13 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.132.246; envelope-from=msteitle@gmail.com Received: by an-out-0708.google.com with SMTP id b2so304792ana for ; Mon, 18 Jun 2007 06:12:36 -0700 (PDT) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=AkzbFZ9UPX1pAt2orlSyLURQR9gFR7PsgRNfp5GZlb0xqaNsiFcKDK1lWsl/YP1nG+qpXb/aWTFHpfGNAlUwIMdmSBJXHUWDopaYzEOP+K8zKcx3KGzh2eAffJZF7tmqxRCB/1WYjKSRkWfb+9P/kW28nuxm14uXcePQh9FCU0c= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=WVVvLleZLYuypHOHDuuNK3ncB6TD1oqBiKbCMP49qM55Ar8kaI8Vbb4Z0bvfFiUsqxvgxTQkwQ5UiLeGGZtKnJBmy0ERrEVF73UKbHfXvQ351eUXShNKnSQKlWwiCXd10XD+jngjTByXjAnF2ThSW5Jh8d5HFwv8QurH7w50dM0= Received: by 10.100.191.5 with SMTP id o5mr3451074anf.1182172355922; Mon, 18 Jun 2007 06:12:35 -0700 (PDT) Received: by 10.100.174.8 with HTTP; Mon, 18 Jun 2007 06:12:35 -0700 (PDT) Message-ID: <5cf132c0706180612s2905a109h390292c271b27a43@mail.gmail.com> Date: Mon, 18 Jun 2007 08:12:35 -0500 From: "Mark Steitle" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: Fw: Different Rotary Port configurations In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_92760_23237462.1182172355892" References: ------=_Part_92760_23237462.1182172355892 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline Thanks Richard for the clarification. Mark S. (Looks like I should have typed a little faster.) On 6/18/07, Mark Steitle wrote: > > Well Ed, > 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? > > Mark S. > > > On 6/17/07, Ed Anderson wrote: > > > > 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. > > > > Ed > > ----- Original Message ----- *From:* Ed Anderson > > *To:* Rotary motors in aircraft > > *Sent:* Sunday, June 17, 2007 10:15 PM > > *Subject:* Different Rotary Port configurations > > > > > > 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. > > > > 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. > > > > 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? > > > > Anyhow, thought some of you might find it interesting. > > > > > > Ed Anderson > > Rv-6A N494BW Rotary Powered > > Matthews, NC > > eanderson@carolina.rr.com > > http://members.cox.net/rogersda/rotary/configs.htm#N494BW > > http://www.dmack.net/mazda/index.html > > > > -- > > Homepage: http://www.flyrotary.com/ > > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html > > > > > > > > > ------=_Part_92760_23237462.1182172355892 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline
Thanks Richard for the clarification.
 
Mark S.
(Looks like I should have typed a little faster.)
 
On 6/18/07, Mark Steitle <msteitle@gmail.com> wrote:
Well Ed,
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?
 
Mark S.

 
On 6/17/07, Ed Anderson <eanderson@carolina.rr.com > wrote:
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.
 
Ed
----- Original Message -----
Sent: Sunday, June 17, 2007 10:15 PM
Subject: Different Rotary Port configurations

 
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.
 
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.
 
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?
 
Anyhow, thought some of you might find it interesting.   
 
 

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