X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-iw0-f180.google.com ([209.85.214.180] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTPS id 5048174 for flyrotary@lancaironline.net; Mon, 11 Jul 2011 08:27:20 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.214.180; envelope-from=rwstracy@gmail.com Received: by iwn9 with SMTP id 9so6034431iwn.25 for ; Mon, 11 Jul 2011 05:26:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=subject:references:from:content-type:x-mailer:in-reply-to :message-id:date:to:content-transfer-encoding:mime-version; bh=lbFaGT8Vj7fn5KyQJtEDp3el7ccy9MvGODSfR1ZHAMw=; b=MYlKAn2J/dp+xbq9Fv5I4AXQm/PK6LKlDIo0gT4jNIW2tjyV2ZLZiHe2MJUw6jBQ1f Y4ypEWZcmdpulFgI8Agxg2/IG6nwYYIMXt0n+qvLOOoDKYYIBoTeegYCWIVu0vsGuip/ eoFnVh0MZjG/9I88ajqHb1UGFt0DZCybQabVM= Received: by 10.42.164.129 with SMTP id g1mr5531089icy.175.1310387203976; Mon, 11 Jul 2011 05:26:43 -0700 (PDT) Return-Path: Received: from [10.0.1.3] (99-197-145-127.cust.wildblue.net [99.197.145.127]) by mx.google.com with ESMTPS id hp8sm13897666icc.11.2011.07.11.05.26.28 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 11 Jul 2011 05:26:42 -0700 (PDT) Subject: Re: [FlyRotary] RD1B Failure References: From: Tracy Content-Type: multipart/alternative; boundary=Apple-Mail-6--779974432 X-Mailer: iPad Mail (8F191) In-Reply-To: Message-Id: Date: Mon, 11 Jul 2011 08:26:16 -0400 To: Rotary motors in aircraft Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (iPad Mail 8F191) --Apple-Mail-6--779974432 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Will be watching for the teardown results David. The shear pin on the sun g= ear is the most likely candidate since it was sized for a normally aspirated= 13B. After the failure on Marks 20B, I have changed the pin diameter and i= f there has not been any damage due to the shaft spinning in the sun gear, i= t can be retrofitted with the larger pin size. Tracy Sent from my iPad On Jul 10, 2011, at 11:58 PM, David Leonard wrote: > Today had a failure of my RD-1B gear drive. It couldn't have happened at a= better time, I was just taxiing off the runway at my home airport. I just f= inished flying 200 mi. to Santa Paula to help Paul with the getting of Mike W= ills airplane back into the air. Flight home was otherwise unevenful and be= autiful. I didn't bother taking it apart, but will do so tomorrow. Feels l= ike I may have broken the sun gear pin again but will have to wait until tom= orrow to be sure. The strange thing is that nothing particularly stressed i= t.=20 >=20 > Sorry there is not cause I can report... a little suspense until tomorrow.= >=20 > --=20 > David Leonard >=20 > Turbo Rotary RV-6 N4VY > http://N4VY.RotaryRoster.net > http://RotaryRoster.net --Apple-Mail-6--779974432 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8

Will be watching for the teardown resul= ts David. The shear pin on the sun gear is the most likely candidate s= ince it was sized for a normally aspirated 13B. After the failure on M= arks 20B, I have changed the pin diameter and if there has not been any dama= ge due to the shaft spinning in the sun gear, it can be retrofitted with the= larger pin size.

Tracy

Sent from my iPad

On Jul 10, 2011, at 11:58 PM, David Leonard <wdleonard@gmail.com> wrote:

Today had a failure of my RD-1B gear dr= ive. It couldn't have happened at a better time, I was just taxiing of= f the runway at my home airport. I just finished flying 200 mi. to San= ta Paula to help Paul with the getting of Mike Wills airplane back into the a= ir. Flight home was otherwise unevenful and beautiful. I didn't b= other taking it apart, but will do so tomorrow. Feels like I may have b= roken the sun gear pin again but will have to wait until tomorrow to be sure= . The strange thing is that nothing particularly stressed it.

Sorry there is not cause I can report... a little suspense until tomorro= w.

--
David Leonard

Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net
http= ://RotaryRoster.net

= --Apple-Mail-6--779974432--