X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-fx0-f52.google.com ([209.85.161.52] verified) by logan.com (CommuniGate Pro SMTP 5.4.1) with ESMTPS id 5093383 for flyrotary@lancaironline.net; Tue, 16 Aug 2011 01:01:14 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.161.52; envelope-from=wdleonard@gmail.com Received: by fxd18 with SMTP id 18so3931394fxd.25 for ; Mon, 15 Aug 2011 22:00:38 -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=uLKU4mZ+GX9V2AtYJhFwbGQLnTbPfHSZzsf8NmgDSDw=; b=RsAjcv6WX7wiWFrktsU/IEZ3qbsZwgEsHb9Nx1h6mMN+Xs8Bcudj2QpSn4K20ilhmX cHqaWpsGXzBYS2SKILXaKxzOim4LokJcGialxYdbz2a2nWdlRmvsWuNPpcy4ILdkS8wJ RvhrFwyQacECdnzKl9nspzHBQFEmPMV44RwLo= MIME-Version: 1.0 Received: by 10.223.29.143 with SMTP id q15mr6529506fac.43.1313470838203; Mon, 15 Aug 2011 22:00:38 -0700 (PDT) Received: by 10.223.2.207 with HTTP; Mon, 15 Aug 2011 22:00:37 -0700 (PDT) In-Reply-To: References: Date: Mon, 15 Aug 2011 22:00:37 -0700 Message-ID: Subject: Re: [FlyRotary] Re: First flight with new Flywheel From: David Leonard To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=00151747c02abbe5ac04aa98427e --00151747c02abbe5ac04aa98427e Content-Type: text/plain; charset=ISO-8859-1 Bolt-on would be a stretch, but not too much work either. Measurements were putting the distance between the damper spline and adapter plate at about zero (after the clutch wear surface was taken down). So just to be on the safe side I had the shop take a small bit off the spline while it was in the machine shop. Now there is a small gap. I think I only took off 0.01 or so... Less that half of the end flange (which I wanted to keep mostly intact to resist radial expansion of the spline. I did not use the washers between the damper plate and flywheel. Currently, they won't fit as they are thicker than the gap between the spline and adapter plate. I could have easily taken a little more off the flywheel and/or spline and they would fit. But I don't really see their purpose anymore. The flywheel makes a nice surface for the dampers to lie against. I see little or no overhang past the flywheel mounting surface. Removing them also reduced the twisting moment on the bolts. Lastly, those washers were really wearing into the damper plate right at the rivets holding the damper support blocks. The scars on the damper plate from the washers show that I was getting a good 3-4 mm of relative movement between the damper plate and the washers/flex plate. I think that much was not necessary. My silicone dampers are stiffer and there is now direct contact between the flywheel and damper plate so it is possible that I am not getting enough dampening and risk damaging the gears. Opinions? -- David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net On Mon, Aug 15, 2011 at 10:11 AM, Kelly Troyer wrote: > Dave, > Also were you able to use the large washers between the damper/drive > plate > and flywheel (as the silicone dampers overhang the outer edge of the > flywheel > mounting area slightly) without triming the nose of the damper spline > ??............ > > Kelly Troyer > *"DYKE DELTA JD2" (Eventually)* > "13B ROTARY"_ Engine > "RWS"_RD1C/EC2/EM2 > "MISTRAL"_Backplate/Oil Manifold > "TURBONETICS"_TO4E50 Turbo > > *From:* Tracy > > *To:* Rotary motors in aircraft > *Sent:* Monday, August 15, 2011 9:38 AM > *Subject:* [FlyRotary] Re: First flight with new Flywheel > > David, > Was it a bolt on change or was it necessary to shorten the nose of the > damper spline to use this flywheel? > > Still looking at options. > > Tracy > > Sent from my iPad > > On Aug 14, 2011, at 7:20 PM, David Leonard wrote: > > I finally took the new flywheel and silicone dampers out for a flight > today. I was hoping for a slight improvement in idle and/or smoothness with > the little bit of extra weight in the flywheel, but I guess 4 lbs is just > not enough to make much of a difference. I flew around for about an hour > and got the RPM up to 7000 and MAP up to 40 in., and loading the plane to 4G > (thinking about gyroscopic forces) without any noticeable change in the way > the engine sounded or ran. Everything look ship-shape on a post-flight > examination. > > This is the ACT flywheel that Kelly found for us. Looks bulletproof > compared to a flex plate. > > Next project, finish installing the ADI system. > > -- > David Leonard > > Turbo Rotary RV-6 N4VY > http://N4VY.RotaryRoster.net > http://RotaryRoster.net > > > > --00151747c02abbe5ac04aa98427e Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Bolt-on would be a stretch, but not too much work either.=A0 Measureme= nts were putting the distance between the damper spline and adapter plate a= t about zero (after the clutch wear surface was taken down).=A0 So just to = be on the safe side I had the shop take a small bit off the spline while it= was in the machine shop.=A0 Now there is a small gap.=A0 I think I only to= ok off 0.01 or so...=A0 Less that half of the=A0end flange (which I wanted = to keep mostly intact to resist radial expansion of the spline.
=A0
I did not use the washers between the damper plate and flywheel.=A0 Cu= rrently, they won't fit as they are=A0thicker than the gap between the = spline and adapter plate.=A0 I could have easily taken a little more off th= e flywheel and/or spline and they would fit.=A0 But I don't really see = their purpose anymore.=A0 The flywheel makes a nice surface for the dampers= to lie against.=A0 I see little or no overhang past the flywheel mounting = surface.=A0 Removing them also reduced the twisting moment on the bolts.=A0= Lastly, those washers were really wearing into the damper plate right at t= he rivets holding the damper support blocks.
=A0
The scars on the damper plate from the washers show that I was getting= a good 3-4 mm of=A0relative movement between the damper plate and the wash= ers/flex plate.=A0 I think that much was not necessary.=A0 My silicone damp= ers are stiffer and there is now direct contact between the flywheel and da= mper plate so it is possible that I am not getting enough dampening and ris= k damaging the gears.=A0 Opinions?

--
David Leonard

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


On Mon, Aug 15, 2011 at 10:11 AM, Kelly Troyer <= span dir=3D"ltr"><keltro@att.net&g= t; wrote:
Dave,
=A0=A0 =A0Also were you able to use the large washers between th= e damper/drive plate
and flywheel (as the silicone dampers overhang the outer edge of= the flywheel
mounting area slightly) without triming = the nose of the damper spline ??............
=A0
Kelly Troyer
"DYKE DELTA JD2" = (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
&quo= t;MISTRAL"_Backplate/Oil Manifold
"TURBONETICS"_TO4E50 Turbo

From: Tracy <rwstracy@gmail.com&g= t;=20

To: R= otary motors in aircraft <flyrotary@lancaironline.net>
Sent: Monday, August 15, 2011 9:38 AM<= br> Subject: [FlyRotary] Re: Fi= rst flight with new Flywheel

David,
=A0=A0 Was it a bolt on change or was it necessary to shorten the nose= of the damper spline to use this flywheel?

Still looking at options.

Tracy

Sent from my iPad

On Aug 14, 2011, at 7:20 PM, David Leonard <wdleonard@gmail.com<= /a>> wrote:



<= /div>


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