Return-Path: Received: from smtpauth03.mail.atl.earthlink.net ([209.86.89.63] verified) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP id 792301 for flyrotary@lancaironline.net; Mon, 14 Mar 2005 08:32:53 -0500 Received-SPF: neutral receiver=logan.com; client-ip=209.86.89.63; envelope-from=jerryhey@earthlink.net Received: from [65.176.160.152] (helo=earthlink.net) by smtpauth03.mail.atl.earthlink.net with asmtp (Exim 4.34) id 1DApfu-0004RZ-6I for flyrotary@lancaironline.net; Mon, 14 Mar 2005 08:32:03 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=simple; s=test1; d=earthlink.net; h=Date:Subject:Content-Type:Mime-Version:From:To:In-Reply-To:Message-Id:X-Mailer; b=bQoRhYk2UwZgja2MUzvSSHPywToTk48UTbiKE96is95G/MRNieT87oZhNaRyV5TO; Date: Mon, 14 Mar 2005 08:33:16 -0500 Subject: Re: [FlyRotary] Re: peripheral ports Content-Type: multipart/alternative; boundary=Apple-Mail-6--643989854 Mime-Version: 1.0 (Apple Message framework v552) From: Jerry Hey To: "Rotary motors in aircraft" In-Reply-To: Message-Id: <9EF954D4-948D-11D9-A291-0003931B0C7A@earthlink.net> X-Mailer: Apple Mail (2.552) X-ELNK-Trace: 8104856d7830ec6b1aa676d7e74259b7b3291a7d08dfec793dcc621d59d9fdb9b427c8ce5e5f3f5f350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 65.176.160.152 --Apple-Mail-6--643989854 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=ISO-8859-1; format=flowed On Monday, March 14, 2005, at 08:02 AM, Paul wrote: > =A0 > > ----- Original Message ----- > From: WRJJRS@aol.com > To: Rotary motors in aircraft > Sent: Sunday, March 13, 2005 11:41 PM > Subject: [FlyRotary] Re: peripheral ports > > In a message dated 3/13/2005 6:29:35 PM Pacific Standard Time,=20 > jesse@jessfarr.com writes: > > Years ago, I was buying something from some feller and he was kind of=20= > high.=A0 When I asked for a little better deal and said I was used to=20= > buying 'em from this other fellow for a lot less but he was out; he=20 > told me real quick=A0like that he could even sell 'em cheaper=A0than = the=20 > other fellow when he didn't have 'em either.=A0 I guess price is not=20= > something to even gripe about if you can't get 'em.=A0 And, I will = admit=20 > that the price might not seem too bad when/if you need housings=20 > anyway. Oh well, I 'll just stay happy with my junker, as long as it=20= > lasts; then I can worry about some of that kind of stuff. But, let's=20= > face it, if the pp engines don't keep running at low rpms and/or idle=20= > well, even though their high rpms can be=A0right down our aircraft use=20= > alley with proper psru gearing, they will not be much good to us; it=20= > seems aircraft actually=A0do have to have an engine that keeps running=20= > on/in slow flight, too. > > =A0Group, > =A0I really would like to know where the idea that the PP rotary won't=20= > idle came from?=A0 > This is total baloney. Lynn Hanover has commented several times that=20= > his=A0PP 12A idles just fine. Some carburated engines with unusual=20 > manifolds sometimes have problems. This is true for both=A0PP and side=20= > port engines. Many of the earlier=A0rotary engines used P ports. > =A0If and engine is radically ported in either port type, (just like a=20= > radically cammed piston engine), it can be difficult to make idle. If=20= > you keep the port timing reasonable the engine ?WILL IDLE FINE,=20 > especially a EFI engine. The throttle plates=A0being close to the=20 > housings makes things work better.=A0The MB C111 used various rotary=20= > configurations. Most of the engines were peripheral ported. There was=20= > no problem with idle, but the=A0sealing problems of that era prevented = a=20 > production version. If your engine is set up=A0carefully without = radical=20 > timing idle won't =A0be a problem. The real problems encountered by = many=20 > people are caused by large ports and extended port timings. > Bill Jepson > =A0 > Hi, Bill....I got the idea that p-ported engines would not idle well=20= > from Mazda Racing, Mazdatrix, and 5 or 6 other shops that will p-port=20= > an engine. One example of other articles referring to the poor idle=20 > can be seen at www.monito.com/wankel/porting.html=A0.=A0 I am not = making=20 > this up....just passing on what I have read from what I thought to be=20= > reputable dealers.=A0 Paul Conner=A0 Paul, all the companies you list sell housings with BIG p - ports and=20 massive overlap. They are designed to develop tremendous hp at high=20 rpm for racing. Of course they don't idle smoothly. These engines=20= have nothing to do with the smaller, conservatively timed p ports that=20= we wish to use as aircraft engines. Jerry > > > > > > > > No virus found in this incoming message. > Checked by AVG Anti-Virus. > Version: 7.0.308 / Virus Database: 266.7.2 - Release Date: 3/11/2005 > --Apple-Mail-6--643989854 Content-Transfer-Encoding: quoted-printable Content-Type: text/enriched; charset=ISO-8859-1 On Monday, March 14, 2005, at 08:02 AM, Paul wrote: =A0 ----- Original Message ----- From: = 1999,1999,FFFFWRJJRS@aol.com To: 1999,1999,FFFFRotary motors in aircraft Sent: Sunday, March 13, 2005 11:41 PM Subject: [FlyRotary] Re: peripheral ports In a message dated 3/13/2005 6:29:35 PM Pacific Standard Time, = 1999,1999,FFFFjesse@jessfarr.com<= /underline> writes: ArialYears ago, I was buying something from some feller and he was kind of high.=A0 When I asked for a little better deal and said I was used to buying 'em from this other fellow for a lot less but he was out; he told me real quick=A0like that he could even sell 'em cheaper=A0than the other fellow when he didn't have 'em either.=A0 I guess price is not something to even gripe about if you can't get 'em.=A0 And, I will admit that the price might not seem too bad when/if you need housings anyway. Oh well, I 'll just stay happy with my junker, as long as it lasts; then I can worry about some of that kind of stuff. But, let's face it, if the pp engines don't keep running at low rpms and/or idle well, even though their high rpms can be=A0right down our aircraft use alley with proper psru gearing, they will not be much good to us; it seems aircraft actually=A0do have to have an engine that keeps running on/in slow flight, = too. =A0Group, =A0I really would like to know where the idea that the PP rotary won't idle came from?=A0 This is total baloney. Lynn Hanover has commented several times that his=A0PP 12A idles just fine. Some carburated engines with unusual manifolds sometimes have problems. This is true for both=A0PP and side port engines. Many of the earlier=A0rotary engines used P ports. =A0If and engine is radically ported in either port type, (just like a radically cammed piston engine), it can be difficult to make idle. If you keep the port timing reasonable the engine ?WILL IDLE FINE, especially a EFI engine. The throttle plates=A0being close to the housings makes things work better.=A0The MB C111 used various rotary configurations. Most of the engines were peripheral ported. There was no problem with idle, but the=A0sealing problems of that era prevented a production version. If your engine is set up=A0carefully without radical timing idle won't =A0be a problem. The real problems encountered by many people are caused by large ports and extended port timings. Bill Jepson =A0 Hi, Bill....I got the idea that p-ported engines would not idle well from Mazda Racing, Mazdatrix, and 5 or 6 other shops that will p-port an engine. One example of other articles referring to the poor idle can be seen at = 1999,1999,FFFFwww.monito.com/wankel/porti= ng.html=A0.=A0 I am not making this up....just passing on what I have read from what I thought to be reputable dealers.=A0 Paul Conner=A0 Paul, all the companies you list sell housings with BIG p - ports and massive overlap. They are designed to develop tremendous hp at high rpm for racing. Of course they don't idle smoothly. These engines have nothing to do with the smaller, conservatively timed p ports that we wish to use as aircraft engines. Jerry < No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.7.2 - Release Date: 3/11/2005 = --Apple-Mail-6--643989854--