Return-Path: Received: from smtp805.mail.sc5.yahoo.com ([66.163.168.184] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with SMTP id 555496 for flyrotary@lancaironline.net; Fri, 03 Dec 2004 20:59:10 -0500 Received-SPF: none receiver=logan.com; client-ip=66.163.168.184; envelope-from=dcarter@datarecall.net Received: from unknown (HELO Davidscmptr) (dcarter11@sbcglobal.net@69.148.208.164 with login) by smtp805.mail.sc5.yahoo.com with SMTP; 4 Dec 2004 01:58:38 -0000 Message-ID: <075901c4d9a4$c3a8cca0$6501a8c0@Davidscmptr> Reply-To: "David Carter" From: "David Carter" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Stock Engine Mount Drawings??? Date: Fri, 3 Dec 2004 19:58:34 -0600 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1437 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1441 Bill, I used Van's drawings to enter engine mount dimensions into Intellicad (open source Autocad clone). Was somewhat successful - biggest problem is that front and side views of gear legs (and sockets) are never shown in "full size". I used CAD to get "auxiliary views" of the gear legs and check various things. Was really hard for me to learn, and very painstaking. (I had custom RV-4 "long gear legs" bent with RV-6 axle angle, and bought partial engine mount for -6 with -4 gear leg sockets. Used CAD to give me the increase in wing incidence in 3 point attitude.) - Just call Van's and get them to tell you which full size dwgs you need to buy from them - about $5 each IIRC. - Maybe they'll give/sell you the RV-7 CAD dwg(s) - I doubt it, as they sometimes invoked "proprietary info" on some of my requests. The dwgs for -6 were manual. I think most dwgs for -7 are on CAD. David ----- Original Message ----- From: "Bill Dube" To: "Rotary motors in aircraft" Sent: Thursday, December 02, 2004 6:58 PM Subject: [FlyRotary] Stock Engine Mount Drawings??? > Does anyone have an accurate drawing of the stock engine mount for the > RV-7? A CAD drawing would be even better. > > The reason I ask is that I am planning to design and build my own engine > mount, and I would like to "reverse engineer" the stock engine mount. > > In addition to simply copying the location of the gear sockets, etc, my > plan is to do the structural analysis (FEA) on the stock mount to see how > strong it is and what loads it was designed to take with the stock engine. > > While it would probably be possible for me to borrow a stock mount from > someone at my local EAA club, mechanical drawings would be much easier than > painstakingly measuring each dimension and drawing it all from scratch.