X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imr-ma02.mx.aol.com ([64.12.206.40] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3839197 for flyrotary@lancaironline.net; Sun, 06 Sep 2009 15:07:36 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.206.40; envelope-from=WRJJRS@aol.com Received: from imo-ma04.mx.aol.com (imo-ma04.mx.aol.com [64.12.78.139]) by imr-ma02.mx.aol.com (8.14.1/8.14.1) with ESMTP id n86J6tU5014887 for ; Sun, 6 Sep 2009 15:06:56 -0400 Received: from WRJJRS@aol.com by imo-ma04.mx.aol.com (mail_out_v42.5.) id q.bf3.6085042e (41812) for ; Sun, 6 Sep 2009 15:06:54 -0400 (EDT) From: WRJJRS@aol.com Message-ID: Date: Sun, 6 Sep 2009 15:06:54 EDT Subject: Re: [FlyRotary] Re: Three or two? To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1252264014" X-Mailer: 9.0 Security Edition for Windows sub 5378 X-Spam-Flag:NO X-AOL-SENDER: WRJJRS@aol.com -------------------------------1252264014 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Gonzalo, Sorry to be contrary, but in my opinion the ONLY way to go for a flying rotary is P-port. All of the original Power Sport engines (the Everette Hatch P.S.) ran P-ports. The manifolding for a P-port engine is vastly easier. In fact Hatch and Steve Beckham built several engines with P-ports that even ran reverse rotation so they could get proper propeller rotation with some gearboxes. You can even P-port an Renesis and it still works. The reason that Mazda isn't P-porting their race cars has nothing to do with if P-porting is better, it is racing organizations requirements. The reason for the side port Renesis is for emissions and low RPM fuel economy. Those are areas that are only important in a CAR. The typical aircraft runs 50% to 90% ALL THE TIME and P-ports are much better at mid to high RPMS. The Mazda Le Mans winning engine used P-ports and they were running with a fuel economy formula. (the fuel was limited) For high output P-ports just work better. Bill Jepson Gonzalo, A lot of people talk about peripheral porting rotaries but nobody is doing it with a rotary that they plan to fly behind. If it was such a good thing, Mazda would be P-Porting their cars. Instead they are going away even from the peripheral port for the exhaust with the Renesis. If 200 HP will do it for you the Renesis is the way to go. This process of putting an alternative engine in a plane is hard enough without violating the KISS principle. Put in a Renesis, no turbo, no P-Port. Bill B ____________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of George Lendich Sent: Sunday, August 23, 2009 5:57 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Three or two? Gonzalo, I don't know if the Renesis has a turbo version, I didn't think it did. All turbo 13B's require low compression rotors. -------------------------------1252264014 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
Gonzalo,
Sorry to be contrary, but in my opinion the ONLY way to go for a flyi= ng=20 rotary is P-port. All of the original Power Sport engines (the Everette Ha= tch=20 P.S.) ran P-ports. The manifolding for a P-port engine is vastly easier.= In fact=20 Hatch and Steve Beckham built several engines with P-ports that even ran= reverse=20 rotation so they could get proper propeller rotation with some gearboxes.= You=20 can even P-port an Renesis and it still works. The reason that Mazda isn't= =20 P-porting their race cars has nothing to do with if P-porting is better,= it is=20 racing organizations requirements. The reason for the side port Renesis is= for=20 emissions and low RPM fuel economy. Those are areas that are only importan= t in a=20 CAR. The typical aircraft runs 50% to 90% ALL THE TIME and P-ports are muc= h=20 better at mid to high RPMS. The Mazda Le Mans winning engine used P-ports= and=20 they were running with a fuel economy formula. (the fuel was limited) For= high=20 output P-ports just work better.
Bill Jepson

Gonzalo,=

A lot of peop= le talk=20 about peripheral porting rotaries but nobody is doing it with a rotary= that=20 they plan to fly behind.  If it was such a good thing, Mazda would= be=20 P-Porting their cars.  Instead they are going away even from the=20 peripheral port for the exhaust with the Renesis. =20

If 200 HP wil= l do it=20 for you the Renesis is the way to go.  This process of putting an= =20 alternative engine in a plane is hard enough without violating the KISS= =20 principle.

Put in a Rene= sis, no=20 turbo, no P-Port.

Bill=20 B

 

From:<= /SPAN>=20 Rotary motors in aircraft= =20 [mailto:flyrotary@lancaironline.net] Sent: Sunday, August 23, 2009 5:5= 7=20 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Three or= =20 two?

 

Gonzalo,

I don't know if the Renesi= s has a=20 turbo version, I didn't think it did. All turbo 13B's require low= =20 compression rotors.

 

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