X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from qw-out-2122.google.com ([74.125.92.25] verified) by logan.com (CommuniGate Pro SMTP 5.3.4) with ESMTP id 4173580 for flyrotary@lancaironline.net; Sun, 21 Mar 2010 10:05:47 -0400 Received-SPF: pass receiver=logan.com; client-ip=74.125.92.25; envelope-from=rwstracy@gmail.com Received: by qw-out-2122.google.com with SMTP id 3so707233qwe.25 for ; Sun, 21 Mar 2010 07:05:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:received:in-reply-to :references:date:x-google-sender-auth:message-id:subject:from:to :content-type; bh=Jihnfv8VBM+VYyLki3M+VXc+MQVJVuYcHkff8isBi3k=; b=EKRsVYQbC6AznOp5sOOnB1ql3yXf5Ha7Ev7SNQK+L2DwKLdbR6/z668SJbK9K7Mzkg AodfyY+8dl7fGAa1T+2osMtVeC4AVeGsA4xvl0avE0QkKHw7Oudf4ziXmAZ3qODQfyER vGLU/1nw8sCOlNNNlwm4zMocHhHp8RBgDeOG8= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; b=Nq48to5UNZVZ0Nl4FpF8s3eMvfmfwkSywR50/iZJBvlXjtPGpebDKBGVkJ5fhWMeGi nvaZi/P8VnpK4cmNIqOjgS625utVZkQMwtObgZJMMzUeKRdS9R/WybJckGNQUkuDNV7L Mt7M4Fduh4QnvblPnSt1q6d9oTkZ+r2R9fu5E= MIME-Version: 1.0 Sender: rwstracy@gmail.com Received: by 10.224.127.1 with SMTP id e1mr1937444qas.89.1269180310678; Sun, 21 Mar 2010 07:05:10 -0700 (PDT) In-Reply-To: References: Date: Sun, 21 Mar 2010 10:05:10 -0400 X-Google-Sender-Auth: 91be145ea04683bc Message-ID: <1b4b137c1003210705n2153583ck180ca04b769962ea@mail.gmail.com> Subject: Re: [FlyRotary] Question on RD2-C From: Tracy Crook To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0016e640820e92eeae048250114d --0016e640820e92eeae048250114d Content-Type: text/plain; charset=ISO-8859-1 The rivets are aluminum. Tracy On Sun, Mar 21, 2010 at 9:58 AM, Kelly Troyer wrote: > Mark or Tracy, > Question comes to my mind............Are the original damper rivets > aluminum > or steel ?.............I am 60 miles away from the hangar and my damper or > I would > check for myself (Not Just Lazy)................ > > Thanks, > -- > Kelly Troyer > "Dyke Delta"_13B ROTARY Engine > "RWS"_RD1C/EC2/EM2 > "Mistral"_Backplate/Oil Manifold > > > > > > -------------- Original message from Mark Steitle : > -------------- > > > > > Update... > > I checked the rivets on my RD2-C damper assembly and was able to confirm > that they were in fact beginning to loosen as evidenced by the radial > streaks on the damper plate. I picked four rivets at random, approx. 90 > degrees apart, and grabbed the shop heads with vice grips and tried to spin > them. All four would spin with little effort, thus confirming that they > were beginning to loosen. After a phone call to Tracy, we decided to > replace the ring of rivets with AN3 bolts, which I've now done. I'll be > watching to see if these show any sign of loosening over time. I would > suggest that checking for smoking rivets on the damper be a regular > inspection item during oil changes. > > Mark S. > > > On Thu, Jan 21, 2010 at 8:47 AM, Mark Steitle wrote: > >> Tracy, >> >> I didn't see any cracks, just streaks radiating out from each rivet. >> Unfortunately, I didn't take a picture, and I cleaned the streaks off and >> reassembled everything. I'll keep a close eye on it and if/when they >> reappear, I'll take a picture and send it to you for evaluation. >> >> I will also check to see how tight the bolts are in the bushings. My >> concern was that there was evidence of deterioration around the outer >> perimeter of the bushings. I think I would feel better if I went ahead and >> replaced them. I'll call you and place an order this week for those. This >> may be caused by the lower rpm (5100-5200) that I typically run in "economy >> cruise" mode. It isn't quite as smooth as running the engine at higher >> rpms, but the fuel burn is much less. Everything is a tradeoff. >> >> Thanks, >> Mark >> >> On Wed, Jan 20, 2010 at 10:35 PM, Tracy Crook > > wrote: >> >>> Hi Mark, >>> I'd need to know more about the 'streaks' to make a guess. If they are >>> just oil streaks, that's no big deal. But if you are talking about cracks, >>> that's a different matter. I do have the damper rubber parts available. I >>> have noticed a little 'creap' in the rubber dampers after several hundred >>> hours on my -4 but as long as the hole is not enlarged (still a snug fit on >>> the drive lugs) they will work fine. >>> >>> I only have about 24 hours on my RV-8 so far but everything looks good. >>> >>> Tracy >>> >>> >>> >>> On Wed, Jan 20, 2010 at 3:28 PM, Mark Steitle wrote: >>> >>>> Hi Tracy, >>>> >>>> I had my RD2-C gearbox off the a/c over the holidays and noticed some >>>> things that I would like your feedback on. FYI - This gearbox is mounted to >>>> a n/a 20B. It has a total of 153 hours on the gearbox. >>>> >>>> First, on the flywheel adapter assembly, there is a pattern of streaks >>>> leading out radially (like spokes on a wagon wheel) from the circle of >>>> rivets. These are the ones arranged in a large circle holding the center >>>> hub to the square aluminum plate (the one with the four rubber snubbers). >>>> Is this normal? Should I replace the rivets or the adapter? If I need to >>>> replace the rivets, which type/size do you recommend. Have you seen any of >>>> these symptoms on your RV-8? >>>> >>>> Also, I noticed some deterioration of the rubber snubbers. I feel these >>>> should be replaced. Do you sell replacement parts, or can you provide a >>>> source for these. >>>> >>>> I have not disassembled and inspected the actual gearbox (yet). >>>> However, I do have a chip detector on the drain line and have only noticed >>>> very fine metal on the magnet (no large chips). I check this regularly. I >>>> run Castrol 100% Synthetic oil in the engine/gearbox & premix 2-stroke oil >>>> in the gas. >>>> >>>> Hope you are doing well and the RV-8 is trouble-free (if that is >>>> possible). >>>> >>>> Thanks, >>>> Mark Steitle >>>> 512/497-3046 >>>> >>> >>> >> > > --0016e640820e92eeae048250114d Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable The rivets are aluminum.=A0

Tracy

On Sun, Mar 21, 2010 at 9:58 AM, Kelly Troyer <keltro@att.net> wrote:
Mark or Tracy,
=A0=A0=A0=A0 Question comes to my mind............Are the original dam= per rivets aluminum
or steel ?.............I am 60 miles away from the hangar and my dampe= r or I would
check for=A0myself (Not Just Lazy)................
=A0
Thanks,
--
Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
&q= uot;RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold <= br>


=A0
-------------- Original message from Mark Steitle = <msteitle@gmail.= com>: --------------




Update... =A0

I checked the rivets on my RD2-C damper assembly and was able to confi= rm that they were in fact beginning to loosen as evidenced by the radial st= reaks on the damper plate. =A0I picked four rivets at random, approx. 90 de= grees apart, and grabbed the shop heads with vice grips and tried to spin t= hem. =A0All four would spin with little effort, thus confirming that they w= ere beginning to loosen. =A0After a phone call to Tracy, we decided to repl= ace the ring of rivets with AN3 bolts, which I've now done. =A0I'll= be watching to see if these show any sign of loosening over time. =A0I wou= ld suggest that checking for smoking rivets on the damper be a regular insp= ection item during oil changes. =A0

Mark S.


On Thu, Jan 21, 2010 at 8:47 AM, Mark Steitle <msteitle@gmail.com> wrote:
Tracy,
=A0
I didn't see any cracks, just streaks radiating out from each rive= t.=A0 Unfortunately, I didn't take a picture, and I cleaned the streaks= off and reassembled everything.=A0 I'll keep a close eye on it and if/= when they reappear, I'll take a picture and send it to you for evaluati= on.=A0
=A0
I will also check to see how tight the bolts are in the bushings.=A0 M= y concern was that there was evidence of deterioration around the outer per= imeter of the bushings.=A0 I think I would feel better if I went ahead and = replaced them.=A0 I'll call you and=A0place an=A0order this week for th= ose.=A0 This may be caused by the lower rpm (5100-5200) that I typically ru= n in "economy cruise" mode.=A0 It isn't quite as smooth as ru= nning the engine at higher rpms, but the fuel burn is much less.=A0 Everyth= ing is a tradeoff.=A0
=A0
Thanks,
Mark=A0

On Wed, Jan 20, 2010 at 10:35 PM, Tracy Crook <tracy@rotaryaviation.com> wrote:
Hi Mark,
=A0 I= 'd need to know more about the 'streaks' to make a guess.=A0 If= they are just oil streaks, that's no big deal.=A0 But if you are talki= ng about cracks, that's a different matter.=A0=A0 I do have the damper = rubber parts available.=A0 I have noticed a little 'creap' in the r= ubber dampers after several hundred hours on my -4 but as long as the hole = is not enlarged (still a snug fit on the drive lugs)=A0 they will work fine= .=A0

I only have about 24 hours on my RV-8 so far but everything looks good.=

Tracy=20

=A0

On Wed, Jan 20, 2010 at 3:28 PM, Mark Steitle <msteitle@gmail.com> wrote:
Hi Tracy,
=A0
I had my RD2-C gearbox off the a/c over the holidays and noticed some = things that I would like your feedback on.=A0 FYI - This gearbox is mounted= to a n/a 20B.=A0 It has a total of 153 hours on the gearbox.
=A0
First, on the=A0flywheel adapter assembly,=A0there is a pattern of str= eaks leading out radially (like spokes on a wagon wheel) from=A0the circle = of rivets.=A0 These are the ones arranged in a large circle holding the cen= ter hub to the square aluminum plate (the one with the four rubber snubbers= ).=A0 Is this normal?=A0 Should I replace the rivets or the adapter?=A0 If = I need to replace the rivets, which type/size do you recommend.=A0 Have you= seen any of these symptoms on your RV-8?=A0
=A0
Also, I noticed some deterioration of the rubber snubbers.=A0 I feel t= hese should be replaced.=A0 Do you sell replacement parts, or can you provi= de a source for these.=A0=A0
=A0
I have not disassembled and inspected the actual gearbox (yet).=A0 How= ever, I do have a chip detector on the drain line=A0and have only noticed v= ery fine metal on the magnet (no large chips).=A0 I check this regularly.= =A0 I run Castrol 100% Synthetic oil in the engine/gearbox & premix=A02= -stroke oil in the gas.
=A0
Hope you are doing well and the RV-8 is trouble-free (if that is possi= ble).
=A0
Thanks,
Mark Steitle
512/497-3046




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