X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imf25aec.mail.bellsouth.net ([205.152.59.73] verified) by logan.com (CommuniGate Pro SMTP 5.0c2) with ESMTP id 716363 for flyrotary@lancaironline.net; Thu, 08 Sep 2005 23:32:59 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.73; envelope-from=sladerj@bellsouth.net Received: from ibm69aec.bellsouth.net ([65.2.92.70]) by imf25aec.mail.bellsouth.net with ESMTP id <20050909033214.LTUT3324.imf25aec.mail.bellsouth.net@ibm69aec.bellsouth.net> for ; Thu, 8 Sep 2005 23:32:14 -0400 Received: from JSLADE ([65.2.92.70]) by ibm69aec.bellsouth.net with ESMTP id <20050909033213.UOZL25279.ibm69aec.bellsouth.net@JSLADE> for ; Thu, 8 Sep 2005 23:32:13 -0400 From: "John Slade" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] High compression Rotors Date: Thu, 8 Sep 2005 23:32:04 -0400 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_01C5_01C5B4CD.85353800" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_01C5_01C5B4CD.85353800 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit I am considering installing high compression rotors in the engine that I am currently building up. Dave, My REW engine has high compression rotors on the recommendation of the rotary race guy who built it. Later I had a long discussion with Leon and a few other rotary experts about what max boost limit to set. As I understand it, the engine will perform significantly better with the high compression rotors (read more HP) and, as with the standard rotors, detonatation can be avoided with the right timing, mixture and intake temp. Based on the input I received I've been keeping my boost at around 46 MAP on take-off and climb. I once tried 44 MAP at 11,000', then throttled back as the GPS hit 235 kts ground speed :). Most of the time I cruise at around 34 - 38 MAP. I have 43 hours on it now and the engine seems to be holding together. I have 3mm apex seals which may help. That's my experience, for what it's worth. Regards, John ------=_NextPart_000_01C5_01C5B4CD.85353800 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I am considering = installing high=20 compression rotors in the engine that I am currently building=20 up.
Dave,
My REW=20 engine has high compression rotors on the recommendation of the rotary = race guy=20 who built it. Later I had a long discussion with Leon = and a few=20 other rotary experts about what max boost limit to set. As I = understand it,=20 the engine will perform significantly better with the high compression = rotors=20 (read more HP) and, as with the standard rotors, detonatation = can be=20 avoided with the right timing, mixture and intake temp. Based = on the=20 input I received I've been keeping my boost at around 46 MAP on = take-off=20 and climb. I once tried 44 MAP at 11,000', then throttled back = as the=20 GPS hit 235 kts ground speed :). Most of the time I cruise at around 34 = - 38=20 MAP. I have 43 hours on it now and the engine seems to be holding = together. I=20 have 3mm apex seals which may help.
That's=20 my experience, for what it's worth.
Regards,
John
 
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