Return-Path: Received: from mail07.syd.optusnet.com.au ([211.29.132.188] verified) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP-TLS id 656013 for flyrotary@lancaironline.net; Wed, 02 Feb 2005 16:19:53 -0500 Received-SPF: none receiver=logan.com; client-ip=211.29.132.188; envelope-from=lendich@optusnet.com.au Received: from george (d211-31-127-226.dsl.nsw.optusnet.com.au [211.31.127.226]) by mail07.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id j12LJJcG008858 for ; Thu, 3 Feb 2005 08:19:20 +1100 Message-ID: <004c01c5096d$23aca750$e27f1fd3@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: current tension bolt recommendations? Date: Thu, 3 Feb 2005 07:21:20 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0049_01C509C0.F52F8470" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_0049_01C509C0.F52F8470 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message Rusty, The RTV doesn't have to stick to the housing to dampen the resonant = frequency - I might try placing some RTV on the centre of the bolt = (letting it dry) before assembly. Much less messy! George ( down under) Chris and I did BOTH... RTV as well as shrink wrap. We used two layers = of shrink wrap, as well as the bead of RTV.=20 =20 The bolts WITH shrink wrap were very snug.. snug enough that once you = put them in, they didnt want to come out easily (as in... dont try, you = might spill some seals... unless you are gonna disassemble the whole = thing..). We had to use a rubber mallet to get them all the way in to = where the threads would grab. =20 Dave Wow, that should be good to at least 20,000 rpm :-)=20 I've done a bit of searching, which led me right back to the Racing = Beat catalog. I'm thinking they may have been the first published = recommendation of this bead of RTV thing. I'm guessing that any of the = above methods will work, and I'll probably just do a combo of a small = spiral bead, and enough in the center of the bolt to try to anchor it to = the intermediate housing. =20 Thanks, Rusty ------=_NextPart_000_0049_01C509C0.F52F8470 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
 
Rusty,
The RTV doesn't have to stick to the = housing to=20 dampen the resonant frequency - I might try placing some RTV on the = centre of=20 the bolt (letting it dry) before assembly.
Much less messy!
George ( down under)
 
Chris and I did BOTH... RTV as well as = shrink wrap.=20 We used two layers of shrink wrap,  as well as the bead of RTV.=20
 
The bolts WITH shrink wrap were very snug.. snug enough = that=20 once you put them in, they didnt want to come out  easily (as = in... dont=20 try, you might spill some seals... unless you are gonna disassemble = the whole=20 thing..). We had to use a rubber mallet to get them all the way in to = where=20 the threads would grab.
 
Dave
Wow, that=20 should be good to at least 20,000 rpm = :-) 
 
I've done a=20 bit of searching, which led me right back to the Racing Beat = catalog. =20 I'm thinking they may have been the first published recommendation of = this=20 bead of RTV thing.  I'm guessing that any of the above methods = will work,=20 and I'll probably just do a combo of a small spiral bead, and enough = in the=20 center of the bolt to try to anchor it to the intermediate = housing. =20
 
Thanks,
Rusty=20
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