Return-Path: <13brv3@bellsouth.net> Received: from imf24aec.mail.bellsouth.net ([205.152.59.72] verified) by logan.com (CommuniGate Pro SMTP 4.2.3) with ESMTP id 435207 for flyrotary@lancaironline.net; Tue, 28 Sep 2004 08:44:04 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.72; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf24aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20040928124334.FHA1757.imf24aec.mail.bellsouth.net@rd> for ; Tue, 28 Sep 2004 08:43:34 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Oil viscosity Date: Tue, 28 Sep 2004 07:43:35 -0500 Message-ID: <001701c4a558$c570b6e0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0018_01C4A52E.DC9AAEE0" 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 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0018_01C4A52E.DC9AAEE0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Very interesting findings Rusty, I'll be very interested in the flight = test results. Another possibility of where the temp increase (with higher viscosity) is coming from is the gear drive. The good thing about = planetary drives is the very high strength from all those gear teeth in mesh. The = bad thing is the higher losses from shearing the oil in all those gear = teeth. I didn't think the difference would be that much but I never tested. = I've always used 15-50 Mobile 1 but will try a batch of 5-30 on the next oil change. Synthetic is my choice because of the much higher shear = strength. =20 Tracy (running the generator)=20 =20 =20 This just gets more interesting by the day, particularly with the temp comments that are coming out from Steve Brooks and others. Also thanks = to Dale (the closet chemist ) for that synthetic oil lesson. I guess I never knew why synthetic was supposed to be so good. I really can't = wait to test this in flight, and I still hope that will happen this weekend. Man, if I could just get a 10-15 degree decrease in climb oil temp, I'd = be in good shape. If this gets me close, I noticed Mobile 1 makes a 0w20 = :-) =20 =20 Cheers, Rusty (already working on rudder and aileron repairs) =20 ------=_NextPart_000_0018_01C4A52E.DC9AAEE0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Very interesting findings Rusty, I'll be very = interested in=20 the flight test results.  Another possibility of where the temp = increase=20 (with higher viscosity) is coming from is the gear drive.  The good = thing=20 about planetary drives is the very high strength from all those gear = teeth in=20 mesh.  The bad thing is the higher losses from shearing the oil in = all=20 those gear teeth.   I didn't think the difference would be = that much=20 but I never tested.  I've always used 15-50 Mobile 1 but will try a = batch=20 of 5-30 on the next oil change.  Synthetic is my choice because of = the much=20 higher shear strength.
 
Tracy  (running the generator) 
 
 
This=20 just gets more interesting by the day, particularly with the temp = comments that=20 are coming out from Steve Brooks and others.  Also thanks to Dale = (the=20 closet chemist <G>) for that synthetic oil lesson.  I = guess I=20 never knew why synthetic was supposed to be so good.   I = really=20 can't wait to test this in flight, and I still hope that will happen = this=20 weekend.  Man, if I could just get a 10-15 degree decrease in = climb=20 oil temp, I'd be in good shape.  If this gets me close, I = noticed=20 Mobile 1 makes a 0w20 :-)  
 
Cheers,
Rusty=20 (already working on rudder and aileron repairs)
   
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