X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-m26.mx.aol.com ([64.12.137.7] verified) by logan.com (CommuniGate Pro SMTP 5.0.6) with ESMTP id 910074 for flyrotary@lancaironline.net; Mon, 02 Jan 2006 01:21:41 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.7; envelope-from=WRJJRS@aol.com Received: from WRJJRS@aol.com by imo-m26.mx.aol.com (mail_out_v38_r6.3.) id q.88.34cbc0d2 (58435) for ; Mon, 2 Jan 2006 01:20:53 -0500 (EST) From: WRJJRS@aol.com Message-ID: <88.34cbc0d2.30ea2045@aol.com> Date: Mon, 2 Jan 2006 01:20:53 EST Subject: Re: [FlyRotary] Single rotor running- Tracy questions To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1136182853" X-Mailer: 9.0 for Windows sub 5044 X-Spam-Flag: NO -------------------------------1136182853 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 1/1/2006 3:46:39 PM Pacific Standard Time, 13brv3@bellsouth.net writes: I need to finish eliminating the leaks, then run it enough to purge any air from the cooling system, and verify that all is well as far as cooling goes. At that point, I can give auto tune a try, and then see if I can make some sense out of the torque reversal induced vibrations. Very interesting Rusty, I suggest that you Google the BD-5 and vibration study. The article talks about the problems of harmonic vibration and is very interesting and understandable as there are no mathematics (vibration studies are very involved) rather there is a discussion of the results of making the system work. I would suggest that anyone thinking of longer shafts or belts read this article. Bill Jepson -------------------------------1136182853 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 1/1/2006 3:46:39 PM Pacific Standard Time, 13brv3@be= llsouth.net writes:

I ne= ed to finish eliminating the leaks, then run it enough to purge any air from= the cooling system, and verify that all is well as far as cooling goes. At that point, I can give auto t= une a try, and then see if I can make some sense out of the torque reversal=20= induced vibrations.

Very interesting Rusty,

I suggest that you Google the BD-5 and vibration study. The artic= le talks about the problems of harmonic vibration and is very interesting an= d understandable as there are no mathematics (vibration studies are very inv= olved) rather there is a discussion of the results of making the system work= . I would suggest that anyone thinking of longer shafts or belts read this a= rticle.

Bill Jepson

-------------------------------1136182853--