X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: <13brv3@bellsouth.net> Received: from imf16aec.mail.bellsouth.net ([205.152.59.64] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 930624 for flyrotary@lancaironline.net; Mon, 02 May 2005 21:36:59 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.64; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf16aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050503013615.PMQA1994.imf16aec.mail.bellsouth.net@rd> for ; Mon, 2 May 2005 21:36:15 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Renesis Build Options Date: Mon, 2 May 2005 20:36:24 -0500 Message-ID: <029e01c54f80$842d0bc0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_029F_01C54F56.9B5703C0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_029F_01C54F56.9B5703C0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Bill, not quite certain how it do that. I can understand that the rotor being coated would tend to lessen the amount of heat the rotor would = absorb and therefore keep the temp of the oil ,which cools the rotor, down. = But, it then seems that heat has to go/do something. I agree there should be some increase in overall efficiency by keeping the temperature of the combustion chamber elevated. However, I believe that heat has to go somewhere and I think you would see a rise in coolant temps. =20 =20 Interesting thought. Two things have happened with the recent engine, = one of which I've only mentioned to Tracy. First, the low oil temp, but = that's only partially due to the ceramic coating. The other is a rise in = EGT's. I've had a problem keeping EGT's below 1750 in climb since the rebuild. = It never dawned on me that some of this might be due to heat that didn't go into the oil. Hmmmmm =20 As for the balancing, I already chimed in on that over the backwards = plastic plane site. I've heard tale that the Renesis rotors aren't nearly as consistent as the 13B rotors were in weight. I know that Bruce was not really suggesting balancing in the past, but maybe the Renesis can make better use of a balancing job. Mind you this is pure speculation. For $350, and no inconvenience, there's no doubt I'd get any engine = balanced. =20 =20 Cheers, Rusty =20 ------=_NextPart_000_029F_01C54F56.9B5703C0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Bill, not quite certain how it do that.  I can understand that = the=20 rotor being coated would tend to lessen the amount of heat the rotor = would=20 absorb and therefore keep the temp of the oil ,which cools the rotor,=20 down.  But, it then seems that heat has to go/do something.  I = agree=20 there should be some increase in overall efficiency by keeping the = temperature=20 of the combustion chamber elevated.  However, I believe that heat = has to go=20 somewhere and I think you would see a rise in coolant = temps.   
 
Interesting=20 thought.  Two things have happened with the recent = engine, one of=20 which I've only mentioned to Tracy.  First, the low oil temp, = but=20 that's only partially due to the ceramic coating.  The other is a = rise in=20 EGT's.  I've had a problem keeping EGT's below  1750 in climb = since=20 the rebuild.  It never dawned on me that some of this might be due = to heat=20 that didn't go into the oil.  Hmmmmm
 
As = for the=20 balancing, I already chimed in on that over the backwards plastic = plane=20 site.  I've heard tale that the Renesis rotors aren't nearly as = consistent=20 as the 13B rotors were in weight.  I know that Bruce was not = really=20 suggesting balancing in the past, but maybe the Renesis = can make=20 better use of a balancing job.  Mind you this is pure=20 speculation.   For $350, and no inconvenience, there's no = doubt=20 I'd get any engine balanced.  
 
Cheers,
Rusty
  
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