X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao107.cox.net ([68.230.241.39] verified) by logan.com (CommuniGate Pro SMTP 5.3.4) with ESMTP id 4174130 for flyrotary@lancaironline.net; Mon, 22 Mar 2010 01:52:14 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.39; envelope-from=alventures@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao107.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20100322055138.NOXR20722.fed1rmmtao107.cox.net@fed1rmimpo02.cox.net> for ; Mon, 22 Mar 2010 01:51:38 -0400 Received: from BigAl ([72.192.128.205]) by fed1rmimpo02.cox.net with bizsmtp id w5rT1d0044S1t5C045rf56; Mon, 22 Mar 2010 01:51:39 -0400 X-VR-Score: 0.00 X-Authority-Analysis: v=1.1 cv=KqzZVGv1/pIBe+XbL3gCBfL8vaFXECOST7Bs1vfp5Gs= c=1 sm=1 a=DvXKY4kB2HcA:10 a=Vegc0WxVmH5BHtpNDyThtA==:17 a=Io6MRAcmzZYRN9YOW-4A:9 a=nLCl3u3HPeS-25K2QPWuv16hkAMA:4 a=CjuIK1q_8ugA:10 a=lTXa3mO6dvzlA5FudjsA:9 a=gLToG2PNSgXpBJcoPKsA:7 a=dHcCAvjlmfR7z0SEG6NcfV9G0xkA:4 a=Vegc0WxVmH5BHtpNDyThtA==:117 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Fwd: Question on RD2-C Date: Sun, 21 Mar 2010 22:51:08 -0800 Message-ID: <569C4C709F524EACAD68C63D5501B317@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0004_01CAC949.05F37F80" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6856 Importance: Normal Thread-Index: AcrJegDLC0HM3nDtQle0iRxAOp9r3AADLpcg In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_0004_01CAC949.05F37F80 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Al, If I read Mark's previous e-mail correctly the bolts were tracy's = suggested fix. That is for Mark's 20B three rotor. Jet nuts (all steel self = locking would be fine) but I would avoid nylocks for this job. If your rivets = are'nt streakng I wouldn't suggest touching them at all. Checking these = fasteners, bolts, or rivets should be done at anual time at least. Bill Jepson =20 You are correct, Bill. That's Tracy's recommended fix for the one case; with no mention of matching bolts and holes, although that could be a = good idea. I'm wondering if it would be the recommended fix for 10, or 50, if = it came to that. The rivets on my 20B are streaking (maybe smoking IS a = better term:-)) and my annual is coming up in about a month. I'm thinking = perhaps that's when I'll address the issue. =20 It occurs to me that my SABER prop extension is bolted the re-drive = flange with 6 - 3/8"-24 high-tensile bolts torqued to 35 ft-lbs with steel lock nuts - no safety wire, all per Saber Manufacturing. There is enough clearance of these bolts in the holes for easy slip-in fit. These are on = a relatively small bolt circle. There is no issue with this setup. So I = would extrapolate that 20 AN3 bolts, properly torqued, on a larger bolt = circle, would be more than adequate. =20 Al ------=_NextPart_000_0004_01CAC949.05F37F80 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Al,

If I read Mark's previous = e-mail correctly the bolts were tracy's = suggested fix. That is for Mark's 20B three rotor. Jet nuts (all steel self locking = would be fine) but I would avoid nylocks for this job. If your rivets are'nt = streakng I wouldn't suggest touching them at all. Checking these fasteners, bolts, or  rivets should be done at anual time at least.

Bill = Jepson

 

You are correct, Bill.  = That’s Tracy’s recommended fix for the one case; with no mention of matching bolts and = holes, although that could be a good idea. I’m wondering if it would be = the recommended fix for 10, or 50, if it came to that.  The rivets on my 20B are = streaking (maybe smoking IS a better termJ) and my annual is coming up in about a month.  = I’m thinking perhaps that’s when I’ll address the = issue.

 

It occurs to me that my SABER = prop extension is bolted the re-drive flange with 6 - 3/8”-24 = high-tensile bolts torqued to 35 ft-lbs with steel lock nuts – no safety wire, = all per Saber Manufacturing.  There is enough clearance of these bolts in = the holes for easy slip-in fit. These are on a relatively small bolt circle. = There is no issue with this setup.  So I would extrapolate that 20 AN3 = bolts, properly torqued, on a larger bolt circle, would be more than = adequate.

 

Al

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