X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-bw0-f226.google.com ([209.85.218.226] verified) by logan.com (CommuniGate Pro SMTP 5.3.4) with ESMTP id 4170181 for flyrotary@lancaironline.net; Thu, 18 Mar 2010 08:09:10 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.218.226; envelope-from=msteitle@gmail.com Received: by bwz26 with SMTP id 26so1518906bwz.27 for ; Thu, 18 Mar 2010 05:08:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type; bh=YMyvlH0e5RgxQpDa9d7zGtTDys3Zf0PmceP0xu1u4yQ=; b=ZE96n5nTKKTQSUB+5BxB6f/WEKlDnSN++Yo07mVhmQvYib/jiZDwQZ7OOJFT6c7e5T ULv8e+hkEvE+x5CenEYPglUo8P/eWbTE8odY1LWY9yBWeaFDNiI5EdrtiZ5WiJa4yt73 Rp/2hI2mREuudv+t5CrvThV7gxYL+GdUxNaY4= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=Rv1th8KSHIwvhiLjnLigDdKitCu9sOhLDdUoImmrR+9uFVKOcskyDTfcOV6KNsxFVf k8Ju+DqplpQNXva0e+napjt3QyROaNyZnSqCsskpNi/QgHyCDLYuyWXxGO5OPLs42O/R Oq4ZgHtgqJ0H5zSsnb5rP7252Xy0DC9IGgP1c= MIME-Version: 1.0 Received: by 10.204.130.153 with SMTP id t25mr2498105bks.85.1268914113310; Thu, 18 Mar 2010 05:08:33 -0700 (PDT) In-Reply-To: References: Date: Thu, 18 Mar 2010 07:08:32 -0500 Message-ID: <5cf132c1003180508m31363dfxc6d8c92eb7e7074f@mail.gmail.com> Subject: Re: [FlyRotary] Re: RD2-C Flywheel Adapter Plate From: Mark Steitle To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0015173ff316f97974048212163d --0015173ff316f97974048212163d Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Al, I'll be going to the airport tomorrow and will take my microscope and will take a real good look at the rivets and the streaks. I'll check to see if the rivets are loose and post my findings on this list. Sounds like it may be a good idea for anyone with a 3-rotor, or even a turbo 2-rotor, to inspect their dampers. Mark S. On Thu, Mar 18, 2010 at 12:57 AM, Al Gietzen wrote: > At the airport today I decided to check whether my RD1B drive adapter > plate had streaks from the rivets as well. It does. I didn=92t disassem= ble > anything so could only look at those that could be seen with a light and = a > mirror through the holes in the flywheel that are not blocked by the coun= ter > weight =96 IOW, I guess it was 4 rivets that I checked. All had the dark > streak going radially outward, similar to what Mark showed in the photo. = On > the =91head side=92 only two of the rivets had a very faint sign of > discoloration toward the outside. > > > > There is no sign of any looseness or relative movement whatever of the > plates. > > > > Mark; have you had a chance to examine more closely? > > > > Al > > > > *Subject:* [FlyRotary] Re: RD2-C Flywheel Adapter Plate > > > > I've never encountered this before but I'd remove the damper, and examin= e > the streaks under a microscope or 10x loop. Obviously you want to check = for > looseness of the rivets. Try gripping the shop head with vice grips and = see > if you can turn the rivet in the hole. If yes, return the damper to me a= nd > I'll evaluate & rework it as needed. > > Tracy > > On Tue, Mar 16, 2010 at 10:08 PM, Mark Steitle wrote= : > > Tracy, > > > > The first time I noticed the streaks I just cleaned them off. They may > have be caused by corrosion X used previously, but I have no way to tell. > Approx. 2-3 hours of running have occurred since I first wiped it clean = and > reinstalled the psru and I have not used any corrosion X or anything else > that could cause the streaks to reappear. I've attached a picture of the > other side which shows similar streaking. So, my guess is they are alumi= num > streaks. Assuming they are smoking rivets, what's the recommended fix? > > > > Mark > > On Tue, Mar 16, 2010 at 9:00 PM, Tracy Crook > wrote: > > I get similar looking streaks caused by the corrosion X that I spray > around in that area to prevent rust & corrosion. But if that is aluminum > dust instead of oil, it requires immediate attention. Are you able to te= ll? > > Tracy > > On Tue, Mar 16, 2010 at 9:16 PM, Mark Steitle wrote: > > This post is directed toward those of you that have a few hundred hours > or more on your RD2-x gearbox. I'm getting "smoke" streaks leading out > radially from the circle of rivets on the flywheel adapter plate on my 20= B. > Do others find these streaks on their adapter plates? I'm wondering if = the > rivets are working loose and need to be replaced or upgraded. Maybe I ne= ed > a beefier adapter plate. Am I worrying over nothing, or is this somethin= g > that is headed for an in-flight failure? > > > > Mark S. > > Austin > > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > > > > > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > > > --0015173ff316f97974048212163d Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Al,
=A0
I'll be going to the airport tomorrow and will take my microscope = and will take a real good look at the rivets and the streaks.=A0 I'll c= heck to see if the rivets are loose and post my findings on this list.=A0 S= ounds like it=A0may be a good idea for anyone with a 3-rotor, or even a tur= bo 2-rotor, to=A0inspect their dampers.
=A0
Mark S.

On Thu, Mar 18, 2010 at 12:57 AM, Al Gietzen <ALVentures@cox.net= > wrote:

At the airp= ort today I decided to check whether my RD1B drive adapter plate had streak= s from the rivets as well.=A0 It does.=A0 I didn=92t disassemble anything s= o could only look at those that could be seen with a light and a mirror thr= ough the holes in the flywheel that are not blocked by the counter weight = =96 IOW, I guess it was 4 rivets that I checked. All had the dark streak go= ing radially outward, similar to what Mark showed in the photo. On the =91h= ead side=92 only two of the rivets had a very faint sign of discoloration t= oward the outside. =A0

=A0<= /font>

There is no= sign of any looseness or relative movement whatever of the plates.<= /font>

=A0<= /font>

Mark; have = you had a chance to examine more closely?

=A0<= /font>

Al

=A0

Subject: [FlyRotary] Re: RD2-C Flywh= eel Adapter Plate

=A0

I've never encountered this before but I'd=A0 remov= e the damper, and examine the streaks under a microscope or 10x loop.=A0 Ob= viously you want to check for looseness of the rivets.=A0 Try gripping the = shop head with vice grips and see if you can turn the rivet in the hole.=A0= If yes, return the damper to me and I'll evaluate & rework it as n= eeded.

Tracy

On Tue, Ma= r 16, 2010 at 10:08 PM, Mark Steitle <msteitle@gmail.com> wrote:

Tracy,

=A0

The first time I noticed= the streaks I just cleaned them off. =A0They may have be caused by corrosi= on X used previously, but I have no way to tell. =A0Approx. 2-3 hours of ru= nning have occurred since I first wiped it clean and reinstalled the psru a= nd I have not used any corrosion X or anything else that could cause the st= reaks to reappear. =A0I've attached a picture of the other side which s= hows similar streaking. =A0So, my guess is they are aluminum streaks. =A0As= suming they are smoking rivets, what's the recommended fix? =A0<= /font>

=A0

Mark=A0

On Tue, Ma= r 16, 2010 at 9:00 PM, Tracy Crook <tracy@rotaryaviation.com> wrote:

I get similar looking streaks caused by the corrosion X tha= t I spray around in that area to prevent rust & corrosion.=A0 But if th= at is aluminum dust instead of oil, it requires immediate attention.=A0 Are= you able to tell?

Tracy

On Tue, Ma= r 16, 2010 at 9:16 PM, Mark Steitle <msteitle@gmail.com> wrote:

This post is directed to= ward those of you that have a few hundred hours or more on your RD2-x gearb= ox. =A0I'm getting "smoke" streaks leading out radially from = the circle of rivets on the flywheel adapter plate on my 20B. =A0Do others = find these streaks on their adapter plates? =A0I'm wondering if the riv= ets are working loose and need to be replaced or upgraded. =A0Maybe I need = a beefier adapter plate. =A0Am I worrying over nothing, or is this somethin= g that is headed for an in-flight failure? =A0

=A0

Mark S.

Austin

=

=A0

--
Homepage: =A0http://www.flyrotary.com/
Archive and UnSub: =A0 http://mail.lancaironline.net:81/lists= /flyrotary/List.html

=A0

=A0


--
Homepage: =A0http://www.flyrotary.com/
Archive and UnSub: =A0 http://mail.lancaironline.net:81/lists= /flyrotary/List.html

=A0


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