X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ug-out-1314.google.com ([66.249.92.168] verified) by logan.com (CommuniGate Pro SMTP 5.1c.3) with ESMTP id 1349818 for flyrotary@lancaironline.net; Sat, 26 Aug 2006 11:36:01 -0400 Received-SPF: pass receiver=logan.com; client-ip=66.249.92.168; envelope-from=blake.lewis@gmail.com Received: by ug-out-1314.google.com with SMTP id j40so1290251ugd for ; Sat, 26 Aug 2006 08:35:20 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=gMK/ByquhTTsJNlORiSttJnVfHK1kfxfqPEZjagi0j0DtLfC3uJL2ZqE/u3AShv59YFsoKdfyuUS43OUGE1vabiddx8pdVVpKllEFlJjg3ofGy5RUNzwWZdXQbP0nnmMv3cQFrnep89KHNmGxHdkOsyLU9N57SnuQIUEmLYQ38U= Received: by 10.66.252.4 with SMTP id z4mr2588253ugh; Sat, 26 Aug 2006 08:35:20 -0700 (PDT) Received: by 10.66.248.6 with HTTP; Sat, 26 Aug 2006 08:35:20 -0700 (PDT) Message-ID: Date: Sat, 26 Aug 2006 10:35:20 -0500 From: "Blake Lewis" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: Exhaust heat (radiant energy) In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: > I love those cool (?) pics of engines running full bore. > > Any thoughts on why the 1st 6-8" of the headers *aren't* glowing? Is the > head sapping off that much heat from the headers? And if so, would some > form of ceramic insulator between engine & header help keep exhaust heat > out of the engine block? > > Charlie Look at where the light is in the photo. It looks like the light source is masked off of the exhuast end of the engine, but not on the area you are speaking of. It is enough light to overcome the red glow. -- Blake C. Lewis