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Return-Path: <13brv3@bellsouth.net> Received: from imf17aec.mail.bellsouth.net ([205.152.59.65] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 3103096 for flyrotary@lancaironline.net; Fri, 19 Mar 2004 21:47:44 -0500 Received: from rad ([68.221.170.60]) by imf17aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040320024744.KFPY1746.imf17aec.mail.bellsouth.net@rad> for ; Fri, 19 Mar 2004 21:47:44 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Cooling Ducts Date: Fri, 19 Mar 2004 20:49:40 -0600 Message-ID: <001001c40e25$fe100ca0$6001a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0011_01C40DF3.B3759CA0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0011_01C40DF3.B3759CA0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable The 1.75" dia tubes should enable it to breath fairly well even with = the long lenghts of runner. It will be interesting to see what you max rpm turns out to be.=20 =20 =20 Hi Ed. Well, I'm expecting good power, and am more interested than = anyone to see what the climb rpm is on the first flight. I haven't changed the pitch of the prop, so this will be a direct comparison between the turbo installation at 5 psi, and the new NA version. I'm actually willing to = run 7500 rpm for speed runs if necessary. We'll see how that works out. =20 =20 As for cooling ducts, there's NFW my ducts are going to come close to resembling what you suggested. When I actually started looking at it = today, I realized that the sides of the inlets are almost a straight shot back = to the evap core since the core is mounted at an angle. The closest side = to the inlet is only about 4 inches, and the longest is only about 9 = inches. Not going to do much shaping in that small of a space. I'm afraid I'll = have to hope for brute force cooling, with minimal assist from proper = shaping. =20 =20 I only got the rough foam cores made today. They fit inside the cowl, = and I marked the inlet. Tomorrow, I have to actually shape it, and hopefully = have time to glass them also. Have I ever mentioned that I hate fiberglass = :-) =20 Rusty =20 ------=_NextPart_000_0011_01C40DF3.B3759CA0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

The 1.75" dia tubes should enable it to breath fairly = well even=20 with the long lenghts of runner. It will be interesting to see = what you=20 max rpm turns out to be.

Hi = Ed. Well,=20 I'm expecting good power, and am more interested than anyone to see what = the=20 climb rpm is on the first flight. I haven't changed the pitch of = the prop,=20 so this will be a direct comparison between the turbo installation at 5 = psi, and=20 the new NA version. I'm actually willing to run 7500 rpm for = speed=20 runs if necessary. We'll see how that works=20 out.

As = for cooling=20 ducts, there's NFW my ducts are going to come close to resembling = what you=20 suggested. When I actually started looking at it today, I realized = that=20 the sides of the inlets are almost a straight shot back to the evap core = since=20 the core is mounted at an angle. The closest side to the inlet is = only=20 about 4 inches, and the longest is only about 9 inches. Not going = to do=20 much shaping in that small of a space. I'm afraid I'll have = to hope=20 for brute force cooling, with minimal assist from proper=20 shaping.

I = only got=20 the rough foam cores made today. They fit inside the cowl, = and I=20 marked the inlet. Tomorrow, I have to actually shape it, and=20 hopefully have time to glass them also. Have I ever mentioned that = I hate=20 fiberglass :-)

Rusty=20

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