Return-Path: <13brv3@bellsouth.net> Received: from imf23aec.mail.bellsouth.net ([205.152.59.71] verified) by logan.com (CommuniGate Pro SMTP 4.1.3) with ESMTP id 2565471 for flyrotary@lancaironline.net; Tue, 02 Sep 2003 23:43:53 -0400 Received: from rad ([68.212.14.21]) by imf23aec.mail.bellsouth.net (InterMail vM.5.01.05.27 201-253-122-126-127-20021220) with ESMTP id <20030903034352.NHIF1849.imf23aec.mail.bellsouth.net@rad> for ; Tue, 2 Sep 2003 23:43:52 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Fwd: [FlyRotary] Re: flight #2 and #3 Date: Tue, 2 Sep 2003 22:43:55 -0500 Message-ID: <006201c371cd$99edf8d0$0201a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0063_01C371A3.B117F0D0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0063_01C371A3.B117F0D0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable The oil temp measured as close to the rear main oil gallery as possible should be 210 or below. That is because the bearing overlay material is loosing strength with higher temps. This is a rule developed based on racing, (Racing Beat) where RPMs will be around 9,000 for 13Bs. Or 9,500 = for 12As. Bearing stress is lower around 6,500 RPM. Still, it's not a bad = idea to Keep the oil well under 200 degrees. The engine builder reports power = lost Above 160 degrees on the oil temp. Water under 200 is OK. Power loss = above 180, But no damage. =20 Always a pleasure to hear your comments Lynn. Thanks. =20 Rusty =20 ------=_NextPart_000_0063_01C371A3.B117F0D0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

The oil temp measured as close to the rear main oil = gallery as=20 possible
should be 210 or below. That is because the bearing overlay = material=20 is
loosing strength with higher temps. This is a rule developed based = on
racing, (Racing Beat) where RPMs will be around 9,000 for 13Bs. Or = 9,500=20 for
12As. Bearing stress is lower around 6,500 RPM. Still, it's not a = bad=20 idea to
Keep the oil well under 200 degrees. The engine builder = reports power=20 lost
Above 160 degrees on the oil temp. Water under 200 is OK. Power = loss=20 above 180,
But no damage.

 
Always a = pleasure to=20 hear your comments Lynn.   Thanks.
 
Rusty
 



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