X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-vx0-f180.google.com ([209.85.220.180] verified) by logan.com (CommuniGate Pro SMTP 5.4.2) with ESMTPS id 5292783 for flyrotary@lancaironline.net; Mon, 05 Dec 2011 13:59:07 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.220.180; envelope-from=wdleonard@gmail.com Received: by vcbfo14 with SMTP id fo14so4081006vcb.25 for ; Mon, 05 Dec 2011 10:58:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; bh=0qvJfTSKYgFXvYiKUsALOpK91njIy58gQ/NZAy9znWg=; b=V12YKd0a/grA/h3NWrLpBo3GMvXw6H7a2pNgGoTc16mtnj5CTCZNevH+iAzLeGr3mu 1Du5natZiA1o8xfoF4Oq7ojQk/1lDVhspxKsFGet+8Oe5Vn8qq3s5Ly7qd5IoRh/dSCS fX8mSdr1sxU2axKy+iidxhdd25cgaizGFfWbI= MIME-Version: 1.0 Received: by 10.220.107.82 with SMTP id a18mr1144170vcp.79.1323111510337; Mon, 05 Dec 2011 10:58:30 -0800 (PST) Received: by 10.220.191.140 with HTTP; Mon, 5 Dec 2011 10:58:29 -0800 (PST) Date: Mon, 5 Dec 2011 10:58:29 -0800 Message-ID: Subject: Re: [FlyRotary] Lube for RD1B - Full Inspection Report From: David Leonard To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=f46d043891179269d404b35ce7b6 --f46d043891179269d404b35ce7b6 Content-Type: text/plain; charset=ISO-8859-1 Hi Kelly, I finally got around to taking apart my gear box the rest of the way (removing the prop shaft. It was not easy because it had frozen in there pretty well. There is bearing around where the oil comes into the box. It is a split bearing. The old that flows aft (away from the prop) lubes the aft part of that bearing then flow into the main gallery and bathes the planet gears and the rest of the gear drive. The part that was seized was the aft part of that bearing. When it seized the prevented oil from flowing aft into the main gallery. So as far as fixing the lube for the upper planet gears, I don't think that we have any evidence that there is a issue. The damage to my planet gears was probably more from oil starvation causing overheating.. As to the reason for the bearing failure, your guess is as good as mine. Very high duty use with continuous gyroscopic loads and possibly less than ideal oil flow are the likely culprits. It is very likely that we will never know. I continue to have no second thoughts about flying with the RD-1B, though I likely will not race my plane again. Partly because of the gear box issue but mostly because I don't feel comfortable going that much faster than Vne without making some serious mods to my airframe. Wouldn't mind having a nice rotary powered lancair to race though :-) -- David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net On Wed, Nov 30, 2011 at 4:58 PM, Kelly Troyer wrote: > Dave, > Any further thoughts about the cause and fix for the lube problem you > encountered with your RD1B > at Reno beyond having a dedicated oil supply to the Redrive not shared by > the Turbo ?............Any > input from Tracy about the problem ?................ > > > Kelly Troyer > *"DYKE DELTA JD2" (Eventually)* > "13B ROTARY"_ Engine > "RWS"_RD1C/EC2/EM2 > "MISTRAL"_Backplate/Oil Manifold > "TURBONETICS"_TO4E50 Turbo > > *From:* David Leonard > *To:* Rotary motors in aircraft > *Sent:* Saturday, November 26, 2011 12:41 PM > *Subject:* [FlyRotary] Plugs not for Airplanes.. > > Funny thing, > I was just installing a new set of spark plugs and noticed that there is a > set of installation pictures on the stock NGT spark plug.. the last > picture is a big red X through a picture of an airplane. Specifically, we > should apparently not use these spark plugs with motor gliders or > ultralights. So I think regular experimental airplanes should be OK. :-) > > -- > David Leonard > > Turbo Rotary RV-6 N4VY > http://N4VY.RotaryRoster.net > http://RotaryRoster.net > > > > > --f46d043891179269d404b35ce7b6 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi Kelly,

I finally got around to taking apart my gear b= ox the rest of the way (removing the prop shaft. =A0It was not easy because= it had frozen in there pretty well. =A0There is bearing around where the o= il comes into the box. =A0It is a split bearing. =A0The old that flows aft = (away from the prop) lubes the aft part of that bearing then flow into the = main gallery and =A0bathes the planet gears and the rest of the gear drive.= =A0

The part that was=A0seized=A0was the aft part of that b= earing. =A0When it seized the prevented oil from flowing aft into the main = gallery. =A0

So as far as fixing the lube for the = upper planet gears, I don't think that we have any evidence that there = is a issue. =A0The damage to my planet gears was probably more from oil=A0s= tarvation=A0causing overheating..

As to the reason for the bearing failure, your guess is= as good as mine. =A0Very high duty use with continuous gyroscopic loads an= d possibly less than ideal oil flow are the likely culprits. =A0

It is very likely that we will never know. =A0I continue to = have no second thoughts about flying with the RD-1B, though I likely will n= ot race my plane again. =A0Partly because of the gear box issue but mostly = because I don't feel=A0comfortable=A0going that much faster than Vne wi= thout making some serious mods to my airframe. =A0Wouldn't mind having = a nice rotary powered lancair to race though =A0:-)
--=A0
David Leonard

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

On Wed, Nov 30, 2011 at 4:58 PM, Kelly Troyer <keltro@att.net> wrote:
Dave,
=A0Any further thoughts=A0about the cause and fix for=A0the lube= problem you encountered with your RD1B
at Reno beyond having a dedicated oil supply to the Redrive not = shared by the Turbo ?............Any
input from Tracy about the problem ?...............= .
=A0
=A0
Kelly Troyer
"DYKE DELTA JD2" = (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
&quo= t;MISTRAL"_Backplate/Oil Manifold
"TURBONETICS"_TO4E50 Turbo

From: David Leonard &l= t;wdleonard@gmail.= com>
To: Rotary mo= tors in aircraft <flyrotary@lancaironline.net>
Sent: Saturday, November 26,= 2011 12:41 PM
Subject: [= FlyRotary] Plugs not for Airplanes..

Funny thing,
I was just installing a new set of spark plugs and noticed that there = is a set of installation pictures on the stock NGT spark plug.. =A0the last= picture is a big red X through a picture of an airplane. =A0Specifically, = we should apparently not use these spark plugs with motor gliders or ultral= ights. =A0So I think regular experimental airplanes should be OK. =A0:-)

--
David Leonard

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






--f46d043891179269d404b35ce7b6--