X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mx2.netapp.com ([216.240.18.37] verified) by logan.com (CommuniGate Pro SMTP 5.4c2k) with ESMTPS id 4862043 for flyrotary@lancaironline.net; Fri, 11 Feb 2011 10:27:07 -0500 Received-SPF: none receiver=logan.com; client-ip=216.240.18.37; envelope-from=echristley@att.net X-IronPort-AV: E=Sophos;i="4.60,455,1291622400"; d="scan'208";a="517202904" Received: from smtp1.corp.netapp.com ([10.57.156.124]) by mx2-out.netapp.com with ESMTP; 11 Feb 2011 07:24:45 -0800 Received: from [10.62.16.200] (ernestc-laptop.hq.netapp.com [10.62.16.200]) by smtp1.corp.netapp.com (8.13.1/8.13.1/NTAP-1.6) with ESMTP id p1BFOic7020813 for ; Fri, 11 Feb 2011 07:24:44 -0800 (PST) Message-ID: <4D5554BB.1060402@att.net> Date: Fri, 11 Feb 2011 10:24:43 -0500 From: Ernest Christley Reply-To: echristley@att.net User-Agent: Thunderbird 2.0.0.24 (X11/20100623) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Custom blower experiment - 5 References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Tracy wrote: > Holy cow, even though the question understates the torque (the > geardrive multiplies the torque by the ratio) 12 5/16" bolts is > overkill. The RD-1x does it with 12 1/4" bolts. > 1/4" bolts is ridiculous overkill, too. I used 5/16" out of construction expediency. That was the size of the holes in the clutch plate after I removed the rivets. I considered building a set of custom bolts with a .045" high shoulder to center them in the clutch plates hole, and then be smaller to pass through the adapter plate. I considered it for about 30 seconds, then put an order into Aircraft Spruce for some -5 AN hardware 8*)