Return-Path: Received: from mail15.syd.optusnet.com.au ([211.29.132.196] verified) by logan.com (CommuniGate Pro SMTP 4.3c3) with ESMTP-TLS id 824710 for flyrotary@lancaironline.net; Sun, 27 Mar 2005 00:11:08 -0500 Received-SPF: none receiver=logan.com; client-ip=211.29.132.196; envelope-from=lendich@optusnet.com.au Received: from george (d211-31-189-94.dsl.nsw.optusnet.com.au [211.31.189.94]) by mail15.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id j2R5AI2x003307 for ; Sun, 27 Mar 2005 15:10:19 +1000 Message-ID: <001b01c5328b$b8387d80$5ebd1fd3@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] [FlyRotary]RX8 rotor weight Date: Sun, 27 Mar 2005 15:13:31 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0018_01C532DF.899CD620" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_0018_01C532DF.899CD620 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Ken, That's good news as I was hoping for around 8lbs. I'm aiming for 125hp = for the single, so that's good news as well. Although I like the side exhausts for reasons of eliminating the = overlap, I don't like the possibility of having problems clearing a = flooded engine and by all indicators it is a problem. Can't have = everything I suppose! George ( down under) I just found this article in Ward's Auto World (Mar 1, 2002) stating = that the Renesis rotor is 14% lighter - that would make the Renesis = rotor 8.2 lbs, not the 8.7 that I stated earlier. "Design innovations made it possible to eliminate the twin = turbochargers employed by the current 13B rotary engine. By moving the = exhaust ports from the trochoidal housing to the side housing of the = rotor chamber, the overlap between the exhaust and intake port openings = was eliminated - a crucial emissions and power-generating factor. = Meanwhile, reducing rotor weight contributes to higher output of about = 250 hp and torque of 159 lb.-ft. (216 Nm) - figures that are roughly = equivalent to the 280 hp and 152 lb.-ft. (206 Nm) of the twin-turbo 13B = in the existing RX-7 still sold in Japan. Rotor weight was trimmed by = 14%." Ken Powell=20 Bryant, Arkansas=20 501-847-4721 ------=_NextPart_000_0018_01C532DF.899CD620 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Ken,

That's good news as I was hoping = for around=20 8lbs. I'm aiming for 125hp for the single, so that's good news as=20 well.

Although I like the side exhausts for = reasons of=20 eliminating the overlap, I don't like the possibility of having = problems=20 clearing a flooded engine and by all indicators it is a problem. Can't = have=20 everything I suppose!

George ( down under)

I just found this article in Ward's Auto World (Mar 1, 2002) = stating=20 that the Renesis rotor is 14% lighter - that would make the Renesis = rotor 8.2=20 lbs, not the 8.7 that I stated earlier.

"Design innovations made it possible to eliminate the twin = turbochargers=20 employed by the current 13B rotary engine. By moving the exhaust ports = from=20 the trochoidal housing to the side housing of the rotor chamber, the = overlap=20 between the exhaust and intake port openings was eliminated =97 a = crucial=20 emissions and power-generating factor. Meanwhile, reducing rotor = weight=20 contributes to higher output of about 250 hp and torque of 159 lb.-ft. = (216=20 Nm) =97 figures that are roughly equivalent to the 280 hp and 152 = lb.-ft. (206=20 Nm) of the twin-turbo 13B in the existing RX-7 still sold in Japan. = Rotor=20 weight was trimmed by 14%."

Ken Powell
Bryant, Arkansas=20
501-847-4721

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