Return-Path: <13brv3@bellsouth.net> Received: from imf16aec.mail.bellsouth.net ([205.152.59.64] verified) by logan.com (CommuniGate Pro SMTP 4.2.3) with ESMTP id 433297 for flyrotary@lancaironline.net; Sun, 26 Sep 2004 19:39:25 -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 <20040926233856.HQCW1718.imf16aec.mail.bellsouth.net@rd> for ; Sun, 26 Sep 2004 19:38:56 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Oil viscosity Date: Sun, 26 Sep 2004 18:39:16 -0500 Message-ID: <022101c4a422$091bb2b0$04000100@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0222_01C4A3F8.2045AAB0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 In-Reply-To: Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0222_01C4A3F8.2045AAB0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable 5W30 seems a bit low. > > I was thinking the same thing. Leon, will an extremely light oil be able to keep the seperation between the bearings and shaft? On the other hand, will it 'wet' the walls of the cooler better and thereby transfer heat more efficiently? =20 Since when it 30 weight oil is "extremely light"? You might call it extremely standard, or extremely normal :-) As I understand it, the = first number is the cold rating, which is just for cold starting, so it = doesn't have any effect on normal operation. =20 =20 BTW, I made about 3 trips around the airport (on the ground of course), = and just made it to 140 degrees. I'm convinced it's cooling much better = with the lighter (though not extremely light ) oil. Can't wait to fly it, = but next Sunday is the earliest possible opportunity, and probably more like = the next weekend. =20 =20 Rusty (Airbike project for sale cheap on eBay now, gotta make room in = the garage) =20 ------=_NextPart_000_0222_01C4A3F8.2045AAB0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

5W30 seems a bit low.
>
>
I was = thinking the same=20 thing.  Leon, will an
extremely light oil be able to keep the=20 seperation
between the bearings and shaft?  On the other = hand,
will=20 it 'wet' the walls of the cooler better and
thereby transfer heat = more=20 efficiently?

 
Since = when it 30 weight=20 oil is "extremely light"?  You might call it extremely = standard, or=20 extremely normal :-)  As I understand it, the first number is the = cold=20 rating, which is just for cold starting, so it doesn't have any effect = on normal=20 operation. 
 
BTW, I = made about 3=20 trips around the airport (on the ground of course), and just made it to = 140=20 degrees.  I'm convinced it's cooling much better with the lighter = (though=20 not extremely light <g>) oil.  Can't wait to fly it, but next = Sunday=20 is the earliest possible opportunity, and probably more like the next=20 weekend. 
 
Rusty = (Airbike project=20 for sale cheap on eBay now, gotta make room in the = garage)
 



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