X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao102.cox.net ([68.230.241.44] verified) by logan.com (CommuniGate Pro SMTP 5.1.12) with ESMTP id 2325762 for flyrotary@lancaironline.net; Tue, 11 Sep 2007 23:23:36 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.44; envelope-from=alventures@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao102.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20070912032259.PIOZ24419.fed1rmmtao102.cox.net@fed1rmimpo01.cox.net> for ; Tue, 11 Sep 2007 23:22:59 -0400 Received: from BigAl ([72.192.132.90]) by fed1rmimpo01.cox.net with bizsmtp id nFNy1X0011xAn3c0000000; Tue, 11 Sep 2007 23:22:58 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] How cool is too cool? Date: Tue, 11 Sep 2007 20:23:01 -0800 Message-ID: <000001c7f4f4$9b492c50$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C7F4B1.8D25EC50" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C7F4B1.8D25EC50 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable David; =20 Sounds like you could close off the scoop a bit and eliminate some drag. What weight oil are you using? I think operating oil temps of about 140 = and above are fine. The occasional 200F will help evaporate any moisture = that is in there, but even prolonged 140F will do it. Oil temps around 160 = is good, gives good engine power. =20 Lynn has more info on this than I. =20 Al =20 =20 -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of David Leonard Sent: Tuesday, September 11, 2007 5:13 PM To: Rotary motors in aircraft Subject: [FlyRotary] How cool is too cool? =20 I have have about 5 hours on the plane since the latest updates and I = find that even using moderate levels of boost in climb, Coolant temps peak at = 80C (176F) in a prolonged climb and cool to 60-70C (140-160F) in cruise even = at 180KTAS. Oil runs only slightly warmer in prolonged steep climb as high = as 94C(200F) but it also quickly cools to the 60-70C range in cruise.=20 Besides unnecessary drag, is there any problem with with continuous = temps that low? Someone wrote that oil temps in particular should not be that = low and will tend to cause sludge. My oil temps have always been that low, = and I wonder if that may have contributed to my stuck side seals x2. I use mobile-1.=20 --=20 David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net=20 ------=_NextPart_000_0001_01C7F4B1.8D25EC50 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

David;

Sounds like you could close off = the scoop a bit and eliminate some drag. What weight oil are you = using? I think operating oil temps of about 140 and above are fine. The = occasional 200F will help evaporate any moisture that is in there, but even = prolonged 140F will do it. Oil temps around 160 is good, gives good engine = power.

Lynn has more info on this than = I.

Al

-----Original = Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of David Leonard
Sent: Tuesday, September = 11, 2007 5:13 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] How = cool is too cool?

I have have about 5 hours on the plane since = the latest updates and I find that even using moderate levels of boost in = climb, Coolant temps peak at 80C (176F) in a prolonged climb and cool to 60-70C (140-160F) in cruise even at 180KTAS. Oil runs only slightly = warmer in prolonged steep climb as high as 94C(200F) but it also quickly cools to = the 60-70C range in cruise.

Besides unnecessary drag, is there any problem with with continuous = temps that low? Someone wrote that oil temps in particular should not be that = low and will tend to cause sludge. My oil temps have always been that = low, and I wonder if that may have contributed to my stuck side seals = x2. I use mobile-1.

--
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net http://RotaryRoster.net =

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