X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao104.cox.net ([68.230.241.42] verified) by logan.com (CommuniGate Pro SMTP 5.2.7) with ESMTP id 3120920 for flyrotary@lancaironline.net; Tue, 09 Sep 2008 08:55:13 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.42; envelope-from=dale.r@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao104.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20080909125436.OEAN6526.fed1rmmtao104.cox.net@fed1rmimpo01.cox.net> for ; Tue, 9 Sep 2008 08:54:36 -0400 Received: from [192.168.1.100] ([72.223.44.12]) by fed1rmimpo01.cox.net with bizsmtp id Ccub1a0050Flgvc03cub8F; Tue, 09 Sep 2008 08:54:35 -0400 Message-ID: <48C6720A.3030408@cox.net> Date: Tue, 09 Sep 2008 05:54:34 -0700 From: Dale Rogers User-Agent: Thunderbird 2.0.0.16 (Windows/20080708) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: New rotary engine-mazda points on design References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit George Lendich wrote: >>> Dale, >>> What is it, what does it consist of? >>> George ( down under) >> >> >> Aluminized Titanium Nitride >> >> Titanium Nitride is the gold-tone stuff you see on a lot of the >> "better" drill bits, of late. >> >> Dale R. > Dale, > Very good but the substrate aluminum has to have high density, which > is insufficient in most castings. Hence the steel liner. > George (down under) That may be; but there is no particular reason, as yet, to believe that they are doing it that way. They could make the end-walls twice as thick, and they would still be less than two-thirds the weight of the steel end housings. The technology for applying a hard, anti-scuff coating such as AlTiN/TiAlN is actually less problematic than trying to make a steel liner stay attached. Dale R.