X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 21 Jan 2013 01:24:04 -0500 Message-ID: X-Original-Return-Path: Received: from nm28.bullet.mail.bf1.yahoo.com ([98.139.212.187] verified) by logan.com (CommuniGate Pro SMTP 6.0.1) with ESMTPS id 6021013 for lml@lancaironline.net; Sun, 20 Jan 2013 18:36:59 -0500 Received-SPF: none receiver=logan.com; client-ip=98.139.212.187; envelope-from=loantracy@sbcglobal.net Received: from [98.139.212.151] by nm28.bullet.mail.bf1.yahoo.com with NNFMP; 20 Jan 2013 23:36:23 -0000 Received: from [98.139.173.185] by tm8.bullet.mail.bf1.yahoo.com with NNFMP; 20 Jan 2013 23:36:22 -0000 Received: from [127.0.0.1] by smtp112-mob.biz.mail.bf1.yahoo.com with NNFMP; 20 Jan 2013 23:36:22 -0000 X-Yahoo-Newman-Id: 965731.34212.bm@smtp112-mob.biz.mail.bf1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: o20rkhYVM1kjEd93i8sNpKEdjlaCmUs4X8L0CjZ_2uuMKKG EbpE_93sx.PzLqy8OcAxQ1_Fw0rvQZiEBxtntWIF066c4IjFp7zjTfDPWiOp dfylWDGhxElZ7oRc1xWxBmI5vYx2tW0gBcXXPphmbLW08_v1N0AQ1x2CA7wG MQUPV6DgtgFVicrQDdaFwewK_BOOTgCNfziSiu1htDV6wfGGOHbiQjh5PNP8 up60vyvi76IevhJt1eQBczLnjSSUzC46qwMXfsOvaxm92CQUozX5HjlJfTMo PxwTSQaAt_0Y8Xg_IT66WuX2WXff6KKHhZo8dPUFzOP3xVDX4m8nHdMzG7SA 6p2mtKjv_WZ1l5n_S9dLr4fkHN4i0YgaMyZyLKrHojqsXz4gw6mhcQv_HHY_ aJSrqABZWcxRm.Bsnzl5.W1maw8kYbO_gvHCSGxfcP274oUY6f6xf7Y3LyFE m5aqibN9hqFfRLQ7ywLGrhXk94kQ0aNxFhoq7vA-- X-Yahoo-SMTP: LN43WayswBDMCJzZGaCEPUD2CdoSRuZ0PBcoiPUOut_8JSgD Received: from [10.229.152.91] (loantracy@166.137.212.122 with xymcookie) by smtp112-mob.biz.mail.bf1.yahoo.com with SMTP; 20 Jan 2013 15:36:22 -0800 PST Subject: Re: [LML] Fw: [LML] 360 cowl References: From: Jeff Pelletier Content-Type: multipart/alternative; boundary=Apple-Mail-D6229337-AC5D-4DE0-9E0F-E1173DD37E33 X-Mailer: iPhone Mail (10A551) In-Reply-To: X-Original-Message-Id: X-Original-Date: Sun, 20 Jan 2013 15:36:18 -0800 X-Original-To: Lancair Mailing List Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (1.0) --Apple-Mail-D6229337-AC5D-4DE0-9E0F-E1173DD37E33 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Fiberfrax. 2300 degrees. =20 Sent from my iPhone On Jan 19, 2013, at 3:27 PM, Frederick Moreno w= rote: >=20 > =20 > Definitely worth doing, Angier. The the thermal radiation heat flux off t= he red hot exhaust pipes delivers a lot of energy to the inside of the cowl w= hich, even painted white, looks "black" to infra red and so absorbs nearly a= ll of it. Using shiny reflective aluminum to reflect it back to the engine= which can tolerate elevated temperatures is better than the soaking it up w= ith composite cowl and is a good idea. I did the same using reflective Zet= ex fabric (aluminized fiberglass furnace curtain material) after seeing dis= coloration of exterior paint on some aircraft. I think it is a much worse p= roblem on the turbo airplanes because of much greater exhaust surface area r= adiating heat to everything that is line-of-sight from the hot surfaces. > =20 > Very nice job. Looks good! > =20 > Fred Moreno > =20 > =20 > =20 > -------Original Message------- > =20 > I had some aluminum tape kicking around so I said to self, "what the heck,= lets add to > N4ZQ gross weight and move CG forward at the same time." :-) > Was this a useless exercise or will there be some benefit as a heat shield= ? > The sole objective was to help preserve the exterior paint surface. >=20 > Angier Ames > N4ZQ > =20 >=20 > IMG_0334 > =20 >=20 > > IMG_0335 > =20 >=20 > > IMG_0336 > =20 >=20 > =20 --Apple-Mail-D6229337-AC5D-4DE0-9E0F-E1173DD37E33 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 7bit

Fiberfrax. 2300 degrees.

Sent from my iPhone

On Jan 19, 2013, at 3:27 PM, Frederick Moreno <frederickmoreno@bigpond.com> wrote:

Definitely worth doing, Angier. The the thermal radiation heat flux off the red hot exhaust pipes delivers a lot of energy to the inside of the cowl which, even painted white, looks "black" to infra red and so absorbs nearly all of it. Using shiny reflective aluminum to reflect it back to the engine which can tolerate elevated temperatures is better than the soaking it up with composite cowl and is a good idea. I did the same using reflective Zetex fabric (aluminized fiberglass furnace curtain material) after seeing discoloration of exterior paint on some aircraft. I think it is a much worse problem on the turbo airplanes because of much greater exhaust surface area radiating heat to everything that is line-of-sight from the hot surfaces.

Very nice job. Looks good!

Fred Moreno

-------Original Message-------

I had some aluminum tape kicking around so I said to self, "what the heck, lets add to

N4ZQ gross weight and move CG forward at the same time." :-)

Was this a useless exercise or will there be some benefit as a heat shield?

The sole objective was to help preserve the exterior paint surface.

Angier Ames

N4ZQ

<IMG_03341.jpg>

IMG_0334

<IMG_03352.jpg>

IMG_0335

<IMG_03363.jpg>

IMG_0336

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