X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-ew0-f52.google.com ([209.85.215.52] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTPS id 5048936 for flyrotary@lancaironline.net; Tue, 12 Jul 2011 01:16:11 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.215.52; envelope-from=wdleonard@gmail.com Received: by ewy28 with SMTP id 28so1505493ewy.25 for ; Mon, 11 Jul 2011 22:15:35 -0700 (PDT) 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=nFKAmVK64I0UsHSNUmTrr0p/uTeOCtG2nlsUYEWusW4=; b=hymGgCMEYStkoDsWz9D8MpN3PLqiRjbMR9G8V+NsxyNruUlhhnOFIbrkvU5w+cesgM wPQFwhRhIkHjpI1ndjuoMBYFfRiceCb5SlfQ9L4i/dMJ/cBfCNizj15ApGq6HsD/80OE xMECslxypsmGdRcmqh4bJo5xExImm+Lc75EUQ= MIME-Version: 1.0 Received: by 10.213.7.20 with SMTP id b20mr1272056ebb.70.1310447734747; Mon, 11 Jul 2011 22:15:34 -0700 (PDT) Received: by 10.213.27.208 with HTTP; Mon, 11 Jul 2011 22:15:34 -0700 (PDT) In-Reply-To: References: Date: Mon, 11 Jul 2011 22:15:34 -0700 Message-ID: Subject: Re: [FlyRotary] Re: Fwd: RD-1B failure From: David Leonard To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0015174c1a24b9f0d004a7d863cd --0015174c1a24b9f0d004a7d863cd Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable I tried to get into the gear box today, but ran into an impasse trying to get the bell housing off the adapter plate... I think I am done using RTV there. Will probably use a non-adhesive sealant - as long as Tracy says we don't need the adhesion from the RTV. I did find another issue. In addition to a likely fin failure inside the gear box, the flex plate is coming apart. I found a piece of it in my cowl and it is tearing in several places. Still seems to be tracking OK. You know, I wouldn't mind the weight penalty of using the manual flywheel. Would have to drill some holes to attach Tracy's torque plate, but it shoul= d otherwise be an improvement for idle and pulse dampening. But maybe gyroscopic loads would be unacceptably high? Maybe have to move and/or replace the starter. Will try to get some pictures tomorrow. --=20 David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net On Mon, Jul 11, 2011 at 11:51 AM, Mark Steitle wrote: > Al, > > My gearbox failure was approx. 1-1/2 years ago. I attributed the > failure to a very rough running engine which was cured with a mod to the > EC-2 and CAS. I was lucky that it happened on the ground. (Ed can keep = his > "King of Dead Stick Landings" plaque, thank you!) > > If I am correct, Tracy installed a 3/8" pin in my input shaft. No failur= es > since. I now have approx. 200 hours on the engine/gearbox. > > Mark > > On Mon, Jul 11, 2011 at 10:23 AM, David Leonard wrot= e: > >> From: Al Gietzen >> Date: Mon, Jul 11, 2011 at 8:17 AM >> Subject: RD-1B failure >> To: Dave Leonard >> >> >> Hi; Dave, >> >> >> >> I=92m very thankful to hear that this occurred after landing. >> >> >> >> I=92ve been unable to post on the rotary engine list for months due to >> blocking by Cox. Perhaps you=92d post this message on my behalf: >> >> >> >> ---The shear pin on the sun gear is the most likely candidate since it w= as >> sized for a normally aspirated 13B. After the failure on Marks 20B, I = have >> changed the pin diameter >> >> >> >> Tracy; >> >> >> >> Doesn=92t this suggest that all 20B and 13B turbo should be upgraded to = the >> larger pin? When was the failure on Mark=92s 20B? >> >> >> >> Al >> >> --- >> >> > --0015174c1a24b9f0d004a7d863cd Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable I tried to get into the gear box today, but ran into an impasse trying to g= et the bell housing off the adapter plate...=A0 I think I am done using RTV= there.=A0 Will probably use a non-adhesive sealant - as long as Tracy says= we don't need the adhesion from the RTV.

I did find another issue.=A0 In addition to a likely fin failure inside= the gear box, the flex plate is coming apart.=A0 I found a piece of it in = my cowl and it is tearing in several places. Still seems to be tracking OK.=

You know, I wouldn't mind the weight penalty of using the manual fl= ywheel.=A0 Would have to drill some holes to attach Tracy's torque plat= e, but it should otherwise be an improvement for idle and pulse dampening.= =A0 But maybe gyroscopic loads would be unacceptably high?=A0 Maybe have to= move and/or replace the starter.

Will try to get some pictures tomorrow.

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

On Mon, Jul 11, 2011 at 11:51 AM, Mark Steit= le <msteitle@gma= il.com> wrote:
Al,
=A0
My gearbox failure was approx. 1-1/2 years ago.=A0 I attributed=A0the = failure=A0to a very rough running engine which=A0was cured=A0with a mod to = the EC-2 and CAS.=A0 I was lucky that it happened on the ground. =A0(Ed can= keep his "King of Dead Stick Landings" plaque, thank you!)=A0
=A0
If I am correct, Tracy installed a 3/8" pin in my input shaft.=A0= =A0No failures since.=A0 I now have approx. 200 hours on the engine/gearbox= .
=A0
Mark

On Mon, Jul 11, 2011 at 10:23 AM, David Leonard = <wdleonard@gmail.com> wrote:
From: Al Gietzen <ALVentures@cox.net>
Date: Mon, Jul 11, 2011 at 8:17 = AM
Subject: RD-1B failure
To: Dave Leonard <wdleonard@gmail.com>


Hi; Dave,

=A0

I=92m very thankful to hear that this = occurred after landing.

=A0

I=92ve been unable to post on the rota= ry engine list for months due to blocking by Cox.=A0 Perhaps you=92d post t= his message on my behalf:

=A0

---The shear pin on the sun gear is the most likely = candidate since it was sized for a normally aspirated 13B. =A0 After the fa= ilure on Marks 20B, I have changed the pin diameter

=A0=

Tracy;

=A0=

Doesn=92t = this suggest that all 20B and 13B turbo should be upgraded to the larger pi= n? When was the failure on Mark=92s 20B?

=A0=

Al<= /font>

---=A0





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