X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-iy0-f180.google.com ([209.85.210.180] verified) by logan.com (CommuniGate Pro SMTP 5.4.3) with ESMTPS id 5344358 for flyrotary@lancaironline.net; Tue, 10 Jan 2012 09:33:15 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.210.180; envelope-from=wdleonard@gmail.com Received: by iadk27 with SMTP id k27so971243iad.25 for ; Tue, 10 Jan 2012 06:32:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=k2E5S8lcWgXNLm8KDwk6UN/pHTCOQ/HvBlOpaUsw1vg=; b=VMuJkZpbZqdJ+BfY7WQ0WMjRWPbnmpn376ibBAOZ2HctoaW4d5CmDCg3zMUAnvZaO5 Lqm6TTG7W0futq0d7QcTqBglKRWvwQVxKQhxebUFW+SswA/fPng78xeiOiT+IJ3vgsLV DHccuSimPA3swi6jXaTiR7c0Dvmk2X9Q8/ubg= MIME-Version: 1.0 Received: by 10.50.214.38 with SMTP id nx6mr2179306igc.19.1326205959294; Tue, 10 Jan 2012 06:32:39 -0800 (PST) Received: by 10.231.48.13 with HTTP; Tue, 10 Jan 2012 06:32:38 -0800 (PST) In-Reply-To: References: Date: Tue, 10 Jan 2012 06:32:38 -0800 Message-ID: Subject: Re: [FlyRotary] Re: RD1B Failure From: David Leonard To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=14dae93404ed1a50e704b62d6371 --14dae93404ed1a50e704b62d6371 Content-Type: text/plain; charset=ISO-8859-1 Hi Ed, Yes you have missed quite a saga and several failures. The underlying cause of that one seems to be that the auto flex plate fatigued and broke, leading to the pin failure (oversized pin). I replaced the flex plate with a modified 4130 flywheel that seems much better suited to the purpose than the flex-plate. I then had another failure of the RD-1B when the oiling system did not seem up to the task during my qualifying run at Reno (clocked at 229 mph while pulling 2Gs around the course). Of course, I was probably making over 300 h.p. and pushing the RD-1B beyond its design limits. Not to mention that my oil temps were not being measured well and have probably always been higher than I thought. I am guessing oil temps were in excess of 250F when the main plain bearing in the RD-1B seized (after landing). I have since had another failure. This time the sun gear pin seems to have simply fallen out! Well, it fell out as much as it could until the housing would not let it completely go, until the last little piece of the pin sheared off. This was amazingly, again, discovered on the ground after a long over-mountainous-terrain flight to Las Vegas. So despite 4 RD-1B failures in 3 different places all in 2011 (the pin twice, the flex plate, and the main bearing - probably all related to racing in Reno that year) I have not made any ground toward threatening your rotary glider time record. :-) -- David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net On Mon, Jul 11, 2011 at 6:57 AM, Ed Anderson wrote: > ** > Hey, Dave > > Glad you didn't further challenge my Glider record {:>). > > I was thinking that perhaps the stress of the Reno Races might be a > contributing factor to the gear box problem. Particularly if the shear pin > was designed for a N/A 13B. Anyhow, hopefully, it is that simple a cause > and you find no further damage. > > Send from Lake of The Ozarks resort - looking out over the waves and > reclining in a lounge chair in the cool morning breeze > > Ed > > Edward L. Anderson > Anderson Electronic Enterprises LLC > 305 Reefton Road > Weddington, NC 28104 > http://www.andersonee.com > http://www.eicommander.com > > *From:* David Leonard > *Sent:* Sunday, July 10, 2011 11:58 PM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] RD1B Failure > > 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 finished flying 200 mi. to Santa Paula to help Paul with the getting > of Mike Wills airplane back into the air. Flight home was otherwise > unevenful and beautiful. I didn't bother taking it apart, but will do so > tomorrow. Feels like I may have broken 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 tomorrow. > > -- > David Leonard > > Turbo Rotary RV-6 N4VY > http://N4VY.RotaryRoster.net > http://RotaryRoster.net > --14dae93404ed1a50e704b62d6371 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi Ed,
Yes you have missed quite a saga and several failures. =A0The un= derlying cause of that one seems to be that the auto flex plate fatigued an= d broke, leading to the pin failure (oversized pin). =A0I replaced the flex= plate with a modified 4130 flywheel that seems much better suited to the p= urpose than the flex-plate. =A0

I then had another failure of the RD-1B when the oiling= system did not seem up to the task during my qualifying run at Reno (clock= ed at 229 mph while pulling 2Gs around the course). =A0Of course, I was pro= bably making over 300 h.p. and pushing the RD-1B beyond its design limits. = =A0Not to mention that my oil temps were not being measured well and have p= robably always been higher than I thought. =A0I am guessing oil temps were = in excess of 250F when the main plain bearing in the RD-1B=A0seized (after = landing).

I have since had another failure. =A0This time the sun = gear pin seems to have simply fallen out! =A0Well, it fell out as much as i= t could until the housing would not let it=A0completely=A0go, until the las= t=A0little=A0piece of the pin sheared off. =A0This was amazingly, again, di= scovered on the ground after a long over-mountainous-terrain flight to Las = Vegas. =A0

So despite 4 RD-1B failures in 3 different places all i= n 2011 (the pin twice, the flex plate, and the main bearing - probably all = related to racing in Reno that year) I have not made any ground toward thre= atening your rotary glider time record. =A0:-)

--=A0
David Leonard

Turbo Rotary RV-6 N4VYhttp://N4VY.RotaryRoster.net<= br>http://RotaryRoster.net=A0
On Mon, Jul 11, 2011 at 6:57 AM, Ed Anderson <eanderson@carolina.rr.com> wrote:
Hey, Dave
=A0
Glad you didn't further challenge my Glider r= ecord=20 {:>).=A0
=A0
=A0I was thinking that perhaps the stress of the = Reno=20 Races might be a contributing factor to the gear box problem.=A0 Particular= ly=20 if the shear pin was designed for a N/A 13B.=A0 Anyhow, hopefully, it is th= at=20 simple a cause and you find no further damage.
=A0
Send from Lake of The Ozarks resort - looking out= over the=20 waves and reclining in a lounge chair in the cool morning breeze
=A0
Ed
=A0
Edward L. Anderson
Anderson Electronic Enterpr= ises=20 LLC
305 Reefton Road
Weddington, NC 28104
http://www.andersonee.com
http://www.eicommander.com

Sent: Sunday, July 10, 2011 11:58 PM
To: Rotary motors in aircraft <= /div>
Subject: [FlyRotary] RD1B Failure

Today had a failure of my RD-1B gear drive.=A0 It couldn'= ;t=20 have happened at a better time, I was just taxiing off the runway at my hom= e=20 airport.=A0 I just finished flying 200 mi. to Santa Paula to help Paul with= =20 the getting of Mike Wills airplane back into the air.=A0 Flight home was=20 otherwise unevenful and beautiful.=A0 I didn't bother taking it apart, = but=20 will do so tomorrow.=A0 Feels like I may have broken the sun gear pin again= =20 but will have to wait until tomorrow to be sure.=A0 The strange thing is th= at=20 nothing particularly stressed it.

Sorry there is not cause I can=20 report... a little suspense until tomorrow.

--
Dav= id=20 Leonard

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




--14dae93404ed1a50e704b62d6371--