X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mtiwmhc12.worldnet.att.net ([204.127.131.116] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 1010149 for flyrotary@lancaironline.net; Wed, 22 Jun 2005 14:09:44 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.131.116; envelope-from=keltro@att.net Received: from 204.127.135.58 ([204.127.135.58]) by worldnet.att.net (mtiwmhc12) with SMTP id <2005062218084911200a8dv7e>; Wed, 22 Jun 2005 18:08:59 +0000 Received: from [209.247.222.95] by 204.127.135.58; Wed, 22 Jun 2005 18:08:47 +0000 From: keltro@att.net (Kelly Troyer) To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] PSRU adapter plate Date: Wed, 22 Jun 2005 18:08:47 +0000 Message-Id: <062220051808.996.42B9A92F000578D0000003E42160281060019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Feb 14 2005) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_996_1119463727_0" --NextPart_Webmail_9m3u9jl4l_996_1119463727_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Ernest, Without any engineering expertise I would not even consider using 1/4" aluminum plate no matter what alloy !!FWIW -- Kelly Troyer Dyke Delta/13B/RD1C/EC2 -------------- Original message from Ernest Christley : -------------- > My bellhousing is to heavy. Dave McC is considering buying it for his > Europa, so I've been researching what it would take to replace it. I > think Tracy' s adapter plate is a very elegant solution for the > homebuilder (ie, those of use without a foundry). > > His adapter plate uses 1/2" 6061. I've been considering at 7075 > aluminum. It has about twice the cost but also twice the yield > strength. If I could use 1/4" plate instead of the 1/2", the cost would > be comparable, but I would have the very large benefit of saving > something on the order of 4lbs in a very weight sensitive area. I don't > have the expertise to run the numbers with confidence. All I can do is > a static analysis following the directions outlined on PL's website, > just like I did for the engine mount. > > Any advise of stuff to look for that might no be so obvious and not show > up in a static analysis? (the three axis and torsional forces are obvious) --NextPart_Webmail_9m3u9jl4l_996_1119463727_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

Ernest,

Without any engineering expertise I would not even consider using

1/4" aluminum plate no matter what alloy !!FWIW

--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2

-------------- Original message from Ernest Christley <echristley@nc.rr.com>: --------------

> My bellhousing is to heavy. Dave McC is considering buying it for his
> Europa, so I've been researching what it would take to replace it. I
> think Tracy' s adapter plate is a very elegant solution for the
> homebuilder (ie, those of use without a foundry).
>
> His adapter plate uses 1/2" 6061. I've been considering at 7075
> aluminum. It has about twice the cost but also twice the yield
> strength. If I could use 1/4" plate instead of the 1/2", the cost would
> be comparable, but I would have the very large benefit of saving
> something on the order of 4lbs in a very weight sensitive area. I don't
> have the expertise to run the numbers with confidence. All I can do is
> a static analysis following the directions outlined on PL's website,
> just like I did for the engine mount.
>
> Any advise of stuff to look for that might no be so obvious and not show
> up in a static analysis? (the three axis and torsional forces are obvious)

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