X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 65 [XX] (49%) URL: contains host with port number (27%) SPAM TRICK: contains gapped text (24%) BODY: contains text similar to "no experience" Return-Path: Received: from [66.219.56.248] (HELO qnsi-xch.qnsi.net) by logan.com (CommuniGate Pro SMTP 5.1.8) with ESMTP id 1981269 for flyrotary@lancaironline.net; Thu, 12 Apr 2007 08:27:07 -0400 Received-SPF: none receiver=logan.com; client-ip=66.219.56.248; envelope-from=bhughes@qnsi.net X-MimeOLE: Produced By Microsoft Exchange V6.5.6944.0 Content-class: urn:content-classes:message Return-Receipt-To: "Bobby J. Hughes" MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Disposition-Notification-To: "Bobby J. Hughes" Subject: RE: [FlyRotary] Re: Mount offset Date: Thu, 12 Apr 2007 07:27:01 -0600 Message-ID: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Re: Mount offset Thread-Index: Acd8r3hUVq/BzFlUTjuq85RpiswboQAVpnXw From: "Bobby J. Hughes" To: "Rotary motors in aircraft" I did say simple and no I am done with geometry :)=20 -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ernest Christley Sent: Wednesday, April 11, 2007 8:03 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Mount offset Lehanover@aol.com wrote: > =20 > With no experience at all in this area, I had imagined that the engine > would be turned about a vertical line through the prop flange. This,=20 > to induce the required side thrust while keeping the spinner back=20 > plate centered over the hole in the cowling. > =20 > Lynn E. Hanover > This will have very little to do with RVs, but John Dyke specifies 2/3rd of one degree right thrust on the Dyke Delta. That is hinged at the prop flange. He also specifies 1.5 degree upthrust, but that is hinged at the firewall. Bobby, a better way to measure the offset is to break out the old geometry book and calculate the offset. The sin(1.25)x47" is 1.02". =20 The end of the engine will move off center by a long inch. You won't be able to read 1/4 degree on most protractors, but an inch is easy to make out. --=20 ,|"|"|, Ernest Christley | ----=3D=3D=3D<{{(oQo)}}>=3D=3D=3D---- Dyke Delta Builder | o| d |o http://ernest.isa-geek.org | -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html