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Return-Path: Received: from [24.25.9.100] (HELO ms-smtp-01-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 3103162 for flyrotary@lancaironline.net; Fri, 19 Mar 2004 23:06:31 -0500 Received: from edward (clt78-020.carolina.rr.com [24.93.78.20]) by ms-smtp-01-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id i2K46SSn018306 for ; Fri, 19 Mar 2004 23:06:30 -0500 (EST) Message-ID: <000a01c40e30$bb9798b0$2402a8c0@edward> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Cooling Ducts Date: Fri, 19 Mar 2004 23:06:33 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0007_01C40E06.D27C7160" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0007_01C40E06.D27C7160 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message -----=20 From: Russell Duffy=20 To: Rotary motors in aircraft=20 Sent: Friday, March 19, 2004 9:49 PM Subject: [FlyRotary] Re: Cooling Ducts 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 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 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 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 :-) Rusty =20 You gotta do what you gotta do, Rusty However, my ducts are inlets are 7" from the core at their longest, so = sounds pretty much the same constraints. I know - you just don't want = to do all that 'figguring and calclating" - well, always time for that = the second time around (if you need it of course {:>)). Yes, it will be very interesting to see how your NA stands up to your = turbo installation at 5 psi. =20 And, Yes, you have mentioned hating fiberglass. Despite the fact I've = now done plenty of it and am considered the "fiberglass man" around our = pea patch - which means I'm the expert because I've actually put resin = to glass - I still hate it. However, there is no question it is the way = to go for some things as far as time is concerned. Good luck and let her roll Ed Anderson ------=_NextPart_000_0007_01C40E06.D27C7160 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message

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From:=20 Russell=20 Duffy
To: Rotary motors in = aircraft

Sent: Friday, March 19, 2004 = 9:49=20 PM

Subject: [FlyRotary] Re: = Cooling=20 Ducts

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

Hi = Ed. =20 Well, I'm expecting good power, and am more interested than anyone to = see what=20 the climb rpm is on the first flight. I haven't changed the = pitch of the=20 prop, so this will be a direct comparison between the turbo = installation at 5=20 psi, and the new NA version.  I'm actually willing to run = 7500 rpm=20 for speed 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=20 you suggested. When I actually started looking at it today, I = realized=20 that the sides of the inlets are almost a straight shot back to the = evap core=20 since the core is mounted at an angle. The closest side to the = inlet is=20 only about 4 inches, and the longest is only about 9 inches. Not = going=20 to do much shaping in that small of a space. I'm afraid = I'll have=20 to hope 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=20 hate fiberglass :-)

Rusty    =

You gotta do what you = gotta do,=20 Rusty

However, my ducts are = inlets are 7"=20 from the core at their longest, so sounds pretty much the same=20 constraints. I know - you just don't want to do all that = 'figguring and=20 calclating" - well, always time for that the second time around (if = you need=20 it of course {:>)).

Yes, it will be very = interesting to=20 see how your NA stands up to your turbo installation at 5 psi. =20

And, Yes, you have = mentioned hating=20 fiberglass. Despite the fact I've now done plenty of it and am=20 considered the "fiberglass man" around our pea patch - which means I'm = the=20 expert because I've actually put resin to glass - I still hate = it. =20 However, there is no question it is the way to go for some things as = far as=20 time is concerned.

Good luck and let her=20 roll

Ed=20 Anderson

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