X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-d04.mx.aol.com ([205.188.157.36] verified) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1099636 for flyrotary@lancaironline.net; Wed, 10 May 2006 17:08:40 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.157.36; envelope-from=ARGOLDMAN@aol.com Received: from ARGOLDMAN@aol.com by imo-d04.mx.aol.com (mail_out_v38_r7.5.) id q.43f.219350 (16335) for ; Wed, 10 May 2006 17:07:45 -0400 (EDT) From: ARGOLDMAN@aol.com Message-ID: <43f.219350.3193b020@aol.com> Date: Wed, 10 May 2006 17:07:44 EDT Subject: Re: [FlyRotary] Re: Airworthiness To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1147295264" X-Mailer: 9.0 Security Edition for Windows sub 2340 X-Spam-Flag: NO -------------------------------1147295264 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 5/10/2006 10:11:09 A.M. Central Standard Time, eanderson@carolina.rr.com writes: Great to hear the good news, Al, a major milestone for certain. Regarding your wing root cooler. I can only think of four options, 1. The water spray as used by Tracy - as you know very effective - but of course requires you to carry the water 2. Possibility of a permanent fan to pull air through - but I would be a bit concerned about it windmilling at cruise. 3. Possibly use of an external fan to push air through during static ground operations (such as tuning your engine) - but would require a considerable ability to move air. 4. Alternative position - I would assume that would probably be the least desirable solution. Al, I too am thinking about solving this problem. I have some Ideas, none of which I have tried. I have a cabin heater and fan, a multi pass device. If I use oil in it, instead of dumping the heat into the cabin, I can dump it overboard lowering the oil temp. If I do water heating, I can do the same thing to lower the water temp, however that will do little for the oil temp. The second thing that I thought about is a dedicated oil cooler fan which could hinge down, seal the output part of the oil cooler duct and pull the air through when on the ground. When in flight, the fan would be out of the way and not be in the airstream. It would thus not wild mill when flying. Adequate Ground cooling is obviously vital. Think of it in "worst case" terms. I remember being in a long line for takeoff at OSH in 2003, with my Midwest rotary, praying that things would speed up as my temperature gauge got closer and closer to redline. I had to pull out of line, let the engine cool and get back into line in order to keep from glowing. I wonder if extending the exhaust tube, from the oil cooler, to nearer to the prop would help. Other thoughts???? -------------------------------1147295264 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 5/10/2006 10:11:09 A.M. Central Standard Time,=20 eanderson@carolina.rr.com writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>

Great to hear the good news, Al, a major milestone= for=20 certain.

Regarding your wing root cooler. I can only t= hink=20 of four options, 1. The water spray as used by Tracy - as you=20= know=20 very effective - but of course requires you to carry the water 2. =20 Possibility of a permanent fan to pull air through - but I would be a= bit=20 concerned about it windmilling at cruise. 3. Possibly use=20 of an external fan to push air through during static ground operation= s=20 (such as tuning your engine) - but would require a considerable ability to= =20 move air. 4. Alternative position - I would assume that would probably be=20= the=20 least desirable solution.

Al,

I too am thinking about solving this problem. I have some Ideas, none o= f=20 which I have tried. I have a cabin heater and fan, a multi pass device. If I= use=20 oil in it, instead of dumping the heat into the cabin, I can dump it overboa= rd=20 lowering the oil temp. If I do water heating, I can do the same thing to low= er=20 the water temp, however that will do little for the oil temp. The second thi= ng=20 that I thought about is a dedicated oil cooler fan which could hinge down, s= eal=20 the output part of the oil cooler duct and pull the air through when on the=20 ground. When in flight, the fan would be out of the way and not be in the=20 airstream. It would thus not wild mill when flying.

Adequate Ground cooling is obviously vital. Think of it in "worst case"= =20 terms. I remember being in a long line for takeoff at OSH in 2003, with my=20 Midwest rotary, praying that things would speed up as my temperature gauge g= ot=20 closer and closer to redline. I had to pull out of line, let the engine cool= and=20 get back into line in order to keep from glowing. I wonder if extending the=20 exhaust tube, from the oil cooler, to nearer to the prop would help.

Other thoughts????

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