Return-Path: Received: from envelope.rose-hulman.edu ([137.112.8.21] verified) by logan.com (CommuniGate Pro SMTP 4.2b3) with ESMTP-TLS id 86621 for flyrotary@lancaironline.net; Mon, 24 May 2004 02:28:37 -0400 Received: from madsena (dhcp024-160-213-196.ma.rr.com [24.160.213.196]) (authenticated (0 bits)) by envelope.rose-hulman.edu (8.11.6/8.11.6) with ESMTP id i4O6SLt10518 (using TLSv1/SSLv3 with cipher RC4-MD5 (128 bits) verified NO) for ; Mon, 24 May 2004 01:28:33 -0500 (EST) From: "Alex Madsen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Two problems solved, 2 more pop up... Date: Mon, 24 May 2004 01:27:31 -0500 Message-ID: <000001c44158$39d9a970$f166fea9@madsena> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2627 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 I am skeptical of this. Where the light colored aircraft composite? This would make a difference. The higher thermal conductivity of the AL would make it seem much hotter than composites. Both aircraft must be constructed of the same material. Were they? Anyway off to look at my heat transfer book to see what it has to say on this topic. Alex Madsen -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of David Carter Sent: Sunday, May 23, 2004 11:49 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Two problems solved, 2 more pop up... I've noticed that shiney polished aluminum airplanes are quite hot in the sun, whereas white and light cream colored painted exteriors are quite cool. I used to think and "aluminum" finish would be best for reflecting heat, but I no longer think that. I think the same situation would prevail inside the cowl. David ----- Original Message ----- From: "Chad Robinson" To: "Rotary motors in aircraft" Sent: Sunday, May 23, 2004 9:25 PM Subject: [FlyRotary] Re: Two problems solved, 2 more pop up... Given that the primary goal is reflecting radiated heat (rather than "real" > thermal insulation) what's wrong with a coat or two of shiny silver paint? > It's not as good as polished aluminum but it's decent, and high on the > reflective scale. Sherwin Williams (and others) sells a product called > "Silver-Brite" that is marketed as "heat reflective" and "dry heat resistant > to 700degF". I haven't tested its adherence to epoxy so it might need a primer > coat to help it stick better (it's designed for metal) but that's not a > painful step. In any event, it would sure be a lot easier to apply than either > foil OR fiberfrax, especially to an oddly-shaped cowl. > > Unless real thermal insulation properties are necesary? > > Regards, > Chad >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html