X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-02.southeast.rr.com ([24.25.9.101] verified) by logan.com (CommuniGate Pro SMTP 5.1.11) with ESMTP id 2210502 for flyrotary@lancaironline.net; Sat, 28 Jul 2007 19:02:01 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.101; 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-02.southeast.rr.com (8.13.6/8.13.6) with ESMTP id l6SN1FTf028449 for ; Sat, 28 Jul 2007 19:01:16 -0400 (EDT) Message-ID: <46ABCAC7.2000206@nc.rr.com> Date: Sat, 28 Jul 2007 23:01:27 +0000 From: Ernest Christley User-Agent: Thunderbird 1.5.0.10 (X11/20070403) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Gear mesh area? Was [FlyRotary] Re: Gear redrives.com 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 Ed Anderson wrote: > I have not done this but it would be interesting to calculate the teeth mesh area of one of the spur gear PSRU and then compare it to the area of the six pinion sun and planetary gear area engaged to transfer a similar amount of power. I could be wrong, but my gut feel is that the sun and planetary probably have more metal to metal contact area for transferring power than the Sun gear. > > But, like I said - just a hunch, would be interesting to know. Anybody have a quick answer?? > > > > Ed > > > http://www.epi-eng.com/GBX_TOC.htm Maybe?