X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imr-da05.mx.aol.com ([205.188.105.147] verified) by logan.com (CommuniGate Pro SMTP 5.3.5) with ESMTP id 4230865 for flyrotary@lancaironline.net; Thu, 22 Apr 2010 13:35:14 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.105.147; envelope-from=Bktrub@aol.com Received: from imo-da02.mx.aol.com (imo-da02.mx.aol.com [205.188.169.200]) by imr-da05.mx.aol.com (8.14.1/8.14.1) with ESMTP id o3MHYKAw011713 for ; Thu, 22 Apr 2010 13:34:20 -0400 Received: from Bktrub@aol.com by imo-da02.mx.aol.com (mail_out_v42.9.) id q.d9d.412ab97 (37058) for ; Thu, 22 Apr 2010 13:34:15 -0400 (EDT) Received: from magic-d16.mail.aol.com (magic-d16.mail.aol.com [172.19.155.132]) by cia-db04.mx.aol.com (v128.3) with ESMTP id MAILCIADB044-90c24bd08897167; Thu, 22 Apr 2010 13:34:15 -0400 From: Bktrub@aol.com Message-ID: <67081.1745dadf.3901e297@aol.com> Date: Thu, 22 Apr 2010 13:34:15 EDT Subject: Re: [FlyRotary] Re: Lightweight rotary parts and engine mounts (was Cooling f... To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_67081.1745dadf.3901e297_boundary" X-Mailer: 9.0 Security Edition for Windows sub 5377 X-AOL-ORIG-IP: 71.112.30.207 X-AOL-IP: 172.19.155.132 X-Spam-Flag:NO X-AOL-SENDER: Bktrub@aol.com --part1_67081.1745dadf.3901e297_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Maybe having provisions for mounting on the front cover of the engine would avoid conflicts with the exhaust system, and would lessen the amount of mounting tubes/weight needed. I hate to sound like I'm pontificating here, but with all this talk of aluminum side and middle housings with a nitrided wear surface, has anyone thought about the minimum thickness of a steel wear plate to avoid warping due to heating? The reason I ask is that I was thinking that in order to have aluminum side housings, a sandwich of wear plates with the rest of the side plate made from aluminum might work without brazing the steel to the aluminum, if brazing is even possible. Instead of brazing, O-rings like the water jacket o-rings might be incorporated. Just a thought. My RV-4 is 1090 lbs, heavier than I'd like. That's about 230 lbs heavier than the Hatch/Beckham Powersport RV-4 at around 865 lbs, if I recall correctly. Brian trubee --part1_67081.1745dadf.3901e297_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Maybe having provisions for mounting on the front cover of the engine= would=20 avoid conflicts with the exhaust system, and would lessen the amount of mo= unting=20 tubes/weight needed.

I hate to sound like I'm pontificating here, but with all this talk= of=20 aluminum side and middle housings with a nitrided wear surface, has= anyone=20 thought about the minimum thickness of a steel wear plate to avoid warping= due=20 to heating? The reason I ask is that I was thinking that in order to have= =20 aluminum side housings, a sandwich of wear plates with the rest of the sid= e=20 plate made from aluminum might work without brazing the steel to the alumi= num,=20 if brazing is even possible. Instead of brazing, O-rings like the water ja= cket=20 o-rings might be incorporated. Just a thought.

My RV-4 is 1090 lbs, heavier than I'd like. That's about 230 lbs heav= ier=20 than the Hatch/Beckham Powersport RV-4 at around 865 lbs, if I recall corr= ectly.=20

Brian trubee

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