X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 2 [X] Return-Path: Received: from ms-smtp-05.southeast.rr.com ([24.25.9.104] verified) by logan.com (CommuniGate Pro SMTP 5.1.8) with ESMTP id 1978653 for flyrotary@lancaironline.net; Tue, 10 Apr 2007 22:03:03 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.104; envelope-from=echristley@nc.rr.com Received: from [192.168.0.75] (cpe-066-057-038-121.nc.res.rr.com [66.57.38.121]) by ms-smtp-05.southeast.rr.com (8.13.6/8.13.6) with ESMTP id l3B22GpN002824 for ; Tue, 10 Apr 2007 22:02:16 -0400 (EDT) Message-ID: <461C4231.2030505@nc.rr.com> Date: Tue, 10 Apr 2007 22:04:33 -0400 From: Ernest Christley User-Agent: Thunderbird 1.5.0.8 (X11/20061115) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Mount offset References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: Symantec AntiVirus Scan Engine Bobby J. Hughes wrote: > Does anyone have a recommendation how far the mount should be offset for > a Renesis \ C-drive combo? 1.25 degs, 2 degs? > > > > Bobby J Hughes > > > That would completely depend on what airframe you're putting it on. The offset is incorporated for a variety of reasons, some simple and some very complicated, with the goal of having the airplane fly straight at cruise speed, or maybe not need so much rudder on climbout, or to have the airplane respond correctly when the engine is firewalled on a go-around, or ... or... It all depends on what the designer was trying to accomplish and how the thrust line and torques vectors fit in with the rest of the airplane.