X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from rtp-iport-2.cisco.com ([64.102.122.149] verified) by logan.com (CommuniGate Pro SMTP 5.2.1) with ESMTPS id 2821056 for flyrotary@lancaironline.net; Thu, 27 Mar 2008 14:46:04 -0400 Received-SPF: softfail receiver=logan.com; client-ip=64.102.122.149; envelope-from=echristley@nc.rr.com X-IronPort-AV: E=Sophos;i="4.25,564,1199682000"; d="scan'208";a="3258003" Received: from rtp-dkim-2.cisco.com ([64.102.121.159]) by rtp-iport-2.cisco.com with ESMTP; 27 Mar 2008 14:45:26 -0400 Received: from rtp-core-1.cisco.com (rtp-core-1.cisco.com [64.102.124.12]) by rtp-dkim-2.cisco.com (8.12.11/8.12.11) with ESMTP id m2RIjQsB004972 for ; Thu, 27 Mar 2008 14:45:26 -0400 Received: from xbh-rtp-211.amer.cisco.com (xbh-rtp-211.cisco.com [64.102.31.102]) by rtp-core-1.cisco.com (8.13.8/8.13.8) with ESMTP id m2RIjQBU012120 for ; Thu, 27 Mar 2008 18:45:26 GMT Received: from xfe-rtp-202.amer.cisco.com ([64.102.31.21]) by xbh-rtp-211.amer.cisco.com with Microsoft SMTPSVC(6.0.3790.1830); Thu, 27 Mar 2008 14:45:25 -0400 Received: from [64.102.38.143] ([64.102.38.143]) by xfe-rtp-202.amer.cisco.com with Microsoft SMTPSVC(6.0.3790.1830); Thu, 27 Mar 2008 14:45:25 -0400 Message-ID: <47EBEB56.6000509@nc.rr.com> Date: Thu, 27 Mar 2008 14:45:42 -0400 From: Ernest Christley Reply-To: echristley@nc.rr.com User-Agent: Thunderbird 2.0.0.12 (X11/20080227) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Metric Bolts References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 27 Mar 2008 18:45:25.0857 (UTC) FILETIME=[B8895510:01C8903A] Authentication-Results: rtp-dkim-2; header.From=echristley@nc.rr.com; dkim=neutral wrjjrs@aol.com wrote: > There is absolutely no reason to have a hardware failure. None of us should be using non-AN nuts and bolts for any sagnifigant part. Come on guys this is not an area to scrimp. > This is the Flyrotary list. Every one will have to use a great many non-AN nuts and bolts for a very significant part...the rotary engine. There are no AN metric parts. It's not just about saving a few cents. Aircraft Spruce and Wicks prices are not out of line with other quality bolt distributors, but their online catalogs don't even list any metric bolts that I could find; though, I seem to remember some of the same zinc plated stuff that Lowe's has listed in ACS's printed catalog. You can run a test on the bolts you get. A spring type torque wrench and a block of aluminum. Mount the head of the bolt in a vice, pass it through the aluminum, and apply the torque wrench until the threads strip. A couple from various batches will let you know real quick what is usable. I used lots of the hardware store Class 5 1/4" bolts to hold parts together when welding. The Class 3 were not strong enough to be worth keeping around, and I didn't want to weld around the cadmium plating of the Class 8 or AN bolts (burning cadmium is a carcinogen). The AN were no stronger than the Class 5, by measure of my semi-calibrate wrench hand. The Class 5 hardware stuff is worth crap for corrosion resistance, though. I had the oil pan stuck on the bottom of my engine for a few years, while it sat at the back of my workshop. Used some of the Class 5 hardware store bolts, because the original oil pan bolts weren't long enough. About half came out with powdery white rings of corrosion. The trick is going to be finding a good selection of cadmium plated, Class 5, drilled-head, metric bolts. Then put together an order list that will cover most everyone's needs.