Return-Path: <13brv3@bellsouth.net> Received: from imf25aec.mail.bellsouth.net ([205.152.59.73] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 484884 for flyrotary@lancaironline.net; Sun, 24 Oct 2004 12:53:24 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.73; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf25aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20041024165254.KZTY18843.imf25aec.mail.bellsouth.net@rd> for ; Sun, 24 Oct 2004 12:52:54 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: oil cooler duct suggestion Date: Sun, 24 Oct 2004 11:53:13 -0500 Message-ID: <013b01c4b9e9$f3a8eff0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_013C_01C4B9C0.0AD2E7F0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_013C_01C4B9C0.0AD2E7F0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable The inside of the inlet lip looks like it's rather sharp. Does it need rounding like the regular cooling inlets on RV's? You're correct, and that's a good point. It's something else I could = try to salvage the existing oil cooler mounting arrangement. Did you do anything inside the cowl to keep radiant heat from the oil pan off the cooler? A sheet of .020 AL suspended 1/2" below the pan might keep quite a bit of heat out of the cooler. No, I didn't figure there would be a lot of radiant heat from the oil = pan. There should be quite a lot of air flowing from the exit of the oil = cooler directly at the oil pan, so I can't imagine the pan heating the cooler = core up. =20 Tracy Saylor, of extremely fast RV-6 fame, says he has curved turning vanes on the *outlet* side of his cylinders to direct the air toward the exit, rather than letting it hit the bottom of the cowl. Could that idea be used to both direct the exit air & provide a radiant shield? My thinking is that there's so little room between the cooler and pan, = that I wouldn't want to cut it any closer by installing anything in between. = The pan itself is curved, so I'm hopeful that it allows the air to flow = around the pan better than it would if there was a flat shield of some type = there. Could certainly be wrong though. Any guidance I could give the exit air toward the cowl exit would be a good thing, but I just don't see any way = to do it. Thanks, Rusty =20 ------=_NextPart_000_013C_01C4B9C0.0AD2E7F0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message

The inside of the inlet lip looks like it's rather = sharp. Does=20 it need
rounding like the regular cooling inlets on RV's?

You're = correct, and=20 that's a good point.  It's something else I could try to salvage = the=20 existing oil cooler mounting arrangement.

Did you do anything inside the cowl to keep radiant heat from the = oil
pan=20 off the cooler? A sheet of .020 AL suspended 1/2" below the pan
might = keep=20 quite a bit of heat out of the cooler.

No, I didn't = figure there would be=20 a lot of radiant heat from the oil pan.  There should be quite a = lot of air=20 flowing from the exit of the oil cooler directly at the oil pan, so I = can't=20 imagine the pan heating the cooler core up. 

Tracy = Saylor,=20 of  extremely fast RV-6 fame, says he has curved turning
vanes = on the=20 *outlet* side of his cylinders to direct the air toward the
exit, = rather than=20 letting it hit the bottom of the cowl. Could that idea
be used to = both direct=20 the exit air & provide a radiant shield?

My thinking is that = there's so little=20 room between the cooler and pan, that I wouldn't want to cut it any = closer by=20 installing anything in between.  The pan itself is curved, so I'm = hopeful=20 that it allows the air to flow around the pan better than it would if = there was=20 a flat shield of some type there.  Could certainly be wrong = though. =20 Any guidance I could give the exit air toward the cowl exit would be a = good=20 thing, but I just don't see any way to do it.

Thanks,
Rusty =20

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