X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-gx0-f180.google.com ([209.85.161.180] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTPS id 5057268 for flyrotary@lancaironline.net; Tue, 19 Jul 2011 19:10:42 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.161.180; envelope-from=rwstracy@gmail.com Received: by gxk10 with SMTP id 10so2109168gxk.25 for ; Tue, 19 Jul 2011 16:10:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=subject:references:from:content-type:x-mailer:in-reply-to :message-id:date:to:content-transfer-encoding:mime-version; bh=b229Q6+olU7FMjM9K6hvXe14kmV830tyq6cbS++JEG0=; b=TvXK+wUVpfbE2SUwAFs7d7flnyKoUYFtbxaa3FutwU6f8qxAst+9f+BbgSjHoLUno2 Do7P7SJRu/D7fJgHgAVlYiJBbs32AMcz0yf27E6JMSnt4ogqVJEb0jsb8MTb8C90mvgj Nl10pjyhySB5+1ZrMuxrXsxMynWFxy2M8165s= Received: by 10.236.177.1 with SMTP id c1mr9997623yhm.212.1311117005532; Tue, 19 Jul 2011 16:10:05 -0700 (PDT) Return-Path: Received: from [10.0.1.3] (99-197-145-127.cust.wildblue.net [99.197.145.127]) by mx.google.com with ESMTPS id j65sm356933yhm.26.2011.07.19.16.09.50 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 19 Jul 2011 16:10:04 -0700 (PDT) Subject: Re: [FlyRotary] Re: Ok Here are the important flywheel measurements References: From: Tracy Content-Type: multipart/alternative; boundary=Apple-Mail-29--50176117 X-Mailer: iPad Mail (8F191) In-Reply-To: Message-Id: <48C4ABE1-2D1E-48F7-A527-37637CF3CF32@gmail.com> Date: Tue, 19 Jul 2011 19:09:35 -0400 To: Rotary motors in aircraft Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (iPad Mail 8F191) --Apple-Mail-29--50176117 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Are you guys sure you can't put a spacer between counterweight and flywheel?= Remember you can delete the large washer on the flywheel side of the RD-1x= damper to help move it back. Also be aware that the nose of the damper sp= line can be machined off to decrease the needed room between flywheel and ad= apter plate. Don't overcomplicate this thing! Tracy Sent from my iPad On Jul 19, 2011, at 5:52 PM, David Leonard wrote: > Yea, that is a bummer, but I was not very hopeful. So we can weld an addi= tional ring gear onto the face of the other, or machine our existing starter= s and/or flex plates. I will probably do the latter. Won't be that big of a= deal I hope. Thanks for being the parts consultant. At least now you have= a spare start to use should you ever need one. >=20 > David >=20 > On Tue, Jul 19, 2011 at 2:06 PM, Kelly Troyer wrote: > Dave, > =20 > Turbo starter is here..........Priliminary quick and dirty measurements= are 1.875 starter flange > to far end of unactivated starter (bendix) gear) which is 0.121 more than y= our 1.754 number > and the same for all practical purposes considering probable slight errors= .............I do not have > 1988 manual trans starter at the moment but will be at my hangar tomorrow a= nd will pick it up > to bring back with me for an in depth exam for any differences between the= m............If there is > a difference I would think it would be in the starter gear as 1986-91 NA m= anual trans starter =20 > was used on a slightly smaller flywheel although it has worked well on the= larger auto trans > flexplate..........."Sigh".........Such is experimental aviation and so mu= ch for "AS"umptions....<:) > =20 > Kelly Troyer > "DYKE DELTA JD2" (Eventually) > "13B ROTARY"_ Engine > "RWS"_RD1C/EC2/EM2 > "MISTRAL"_Backplate/Oil Manifold > "TURBONETICS"_TO4E50 Turbo >=20 > From: David Leonard > To: Rotary motors in aircraft > Sent: Monday, July 18, 2011 11:28 PM >=20 > Subject: [FlyRotary] Re: Ok Here are the important flywheel measurements >=20 > Hi Kelly, > I already took Tracys plate into account. (I measured it at .520 in). So i= t was 1.234 plus the .520 for the plate. For ease, I measured when the sole= noid was NOT activated. Crossing fingers, but ready to mill the plate and s= tarter.... eh, I mean, hire someone to do it :-) >=20 > David >=20 > On Mon, Jul 18, 2011 at 9:14 PM, Kelly Troyer wrote: > Dave, > =20 > So adding the RD1X mount plate thickness 0.500 (1/2 inch) we have a mea= surement of approx 2.254 inch...........Tracy > calls for a 1986 NA (86 to 91 are the same) manual transmission starter...= ..........I do not know exactly what difference the > turbo starter has except the turbo flywheel and automatic flex-plate are s= lightly larger in diameter and have more ring gear > teeth than the 86-91 NA manual flywheel................There was no turbo e= ngine offered until 1987.............I should have the > turbo starter in a few days so we can decide if it will be about 0.375 in l= onger from mounting flange to end of the starter > gear teeth when activated by the solenoid..............Cross your fingers != !............<:)=20 > =20 > =20 > Kelly Troyer > "DYKE DELTA JD2" (Eventually) > "13B ROTARY"_ Engine > "RWS"_RD1C/EC2/EM2 > "MISTRAL"_Backplate/Oil Manifold > "TURBONETICS"_TO4E50 Turbo >=20 > From: David Leonard > To: Rotary motors in aircraft > Sent: Monday, July 18, 2011 9:34 PM > Subject: [FlyRotary] Re: Ok Here are the important flywheel measurements >=20 > Kelly, here is the starter measurement. This is the starter that Tracy rec= ommends, I forget which one that is. =46rom the engine side of the mounting= flange, to the far end of the tear tooth, I measure 1.754 - give or take. >=20 > --=20 > David Leonard >=20 > Turbo Rotary RV-6 N4VY > http://N4VY.RotaryRoster.net > http://RotaryRoster.net >=20 > On Mon, Jul 18, 2011 at 6:16 PM, Kelly Troyer wrote: > Dave, > While they are at it have them turn the pressure plate surface down to t= he pressure plate mounting > level so all of the rubber osolator is on a flat surface without a 0.018 s= tep at the outer edge.......Or > you could put a washer under the drive plate (like the top washer)........= ....But this would put the drive > plate further forward on the input shaft splines the thickness of the wash= er..........I do not khow if this > would pose a problem or not........... > =20 > Kelly Troyer > "DYKE DELTA JD2" (Eventually) > "13B ROTARY"_ Engine > "RWS"_RD1C/EC2/EM2 > "MISTRAL"_Backplate/Oil Manifold > "TURBONETICS"_TO4E50 Turbo >=20 > From: David Leonard > To: Rotary motors in aircraft > Sent: Monday, July 18, 2011 7:55 PM > Subject: [FlyRotary] Re: Ok Here are the important flywheel measurements >=20 > Well, NOW you tell me... :-) Yea, that was going to be an issues regua= rdless of which solution we chose. I think I will bring mine to a machine s= hop and let them figure it out :-) > =20 > --=20 > David Leonard >=20 > Turbo Rotary RV-6 N4VY > http://N4VY.RotaryRoster.net > http://RotaryRoster.net >=20 >=20 > On Mon, Jul 18, 2011 at 4:49 PM, Kelly Troyer wrote: > Dave, > =20 > Forgot to add that there are 3 clutch pressure plate locating dowels in= the flywheel.........You > will have to knock these out with a punch as their position will not let y= ou properly center the > RD1X drive plate and will not let the drive plate "Float" properly........= ......I have not come up > with a method yet to center the drive plate with the absolute accuracy nee= ded for drilling the > flywheel for the drive plate attach bolts...........Maybe some of the grou= p with more machinists > skills than I can make a recommendation !!..................Also the rear o= f the attach bolt holes > will need to be spotfaced to provide a flat surface for the bolt head or n= ut and washer from > what I have observed on the backside of my flywheel.......................= .<:) =20 > =20 > Kelly Troyer > "DYKE DELTA JD2" (Eventually) > "13B ROTARY"_ Engine > "RWS"_RD1C/EC2/EM2 > "MISTRAL"_Backplate/Oil Manifold > "TURBONETICS"_TO4E50 Turbo >=20 > From: Kelly Troyer > To: Rotary motors in aircraft > Sent: Monday, July 18, 2011 6:29 PM > Subject: [FlyRotary] Ok Here are the important flywheel measurements >=20 > Dave, > The link attached shows the prolite version (9.8 lbs) on the left in th= e photo.............Do you have your starter flange > to gear measurement handy as my RD1X starter (not the turbo model) is 55 m= iles away at the moment...........=20 > =20 > http://www2.advancedclutch.com/products/xact_flywheels.aspx > =20 > Kelly Troyer > "DYKE DELTA JD2" (Eventually) > "13B ROTARY"_ Engine > "RWS"_RD1C/EC2/EM2 > "MISTRAL"_Backplate/Oil Manifold > "TURBONETICS"_TO4E50 Turbo >=20 > From: David Leonard > To: Rotary motors in aircraft > Sent: Monday, July 18, 2011 6:18 PM > Subject: [FlyRotary] Re: Ok Here are the important flywheel measurements >=20 > OK Kelly, > =20 > Thanks to all your hard work and research, I have ordered up the Prolite 9= .8 lb version of this. Decided that I was done with the flex plates. Thank= s for locating a great price. I am a little nervous that the picture does n= ot look right, but I guess I can always return it. > Like you, I figure we will solve the starter issue one way or another. > =20 > --=20 > David Leonard >=20 > Turbo Rotary RV-6 N4VY > http://N4VY.RotaryRoster.net > http://RotaryRoster.net >=20 >=20 > On Sat, Jul 16, 2011 at 2:21 PM, Kelly Troyer wrote: > Dave and All, > =20 > Ok Dave the "ACT" "Streetlite" 13.8 lb flywheel was just deliver= ed and I am in process of taking > your measurements to see where we stand................This flywheel is a t= hing of beauty (to a RotorHead) > and my RD1C drive plate will bolt to it with no problem (through drill and= spotface the rear of the flywheel > because it has a slight taper in that area).............I just have to ver= ify just where the RD1C drive splines > will be positioned (fore and aft) on the input shaft compared to the RX7 f= lexplate.............The clutch plate > friction area is slightly raised (about 0.065) above the clutch mount area= and I would probably take it > down tto the clutch level (probably not necessary but would reduce weight s= lightly.............I have a 93-95 > Turbo starter on the way (should take care of starter mesh problem).......= .......If you are interested I can > guide you to another 93-95 starter (used $49.00 with/shipping) if it is st= ill for sale............. > One other thing at this time..............The lighter 9.8 lb versi= on may be usable but it is listed as 116 > ring gear teeth and I have not found out what its diameter is and what sta= rter would be used with it...... > I suspect it may be the diameter of the NA 13B flywheels and may u= se the 86-91 NA manual trans > starter............You need to talk to the manufacturer..........They are i= n Lancaster, Calif............The 9.8 lb > version is a little more expensive due to more extensive machine work to r= educe weight.............See the > link below............The link to THMotorsports has the best price I have f= ound on the 9.8 lb flywheel......The > photo on their page is not the Rotary 9.8 lb version...........=20 > =20 > http://www2.advancedclutch.com/products/xact_flywheels.aspx > =20 > =20 > http://thmotorsports.com/act/act_flywheel_prolite/600140/i-47718.aspx > =20 > Kelly Troyer > "DYKE DELTA JD2" (Eventually) > "13B ROTARY"_ Engine > "RWS"_RD1C/EC2/EM2 > "MISTRAL"_Backplate/Oil Manifold > "TURBONETICS"_TO4E50 Turbo >=20 > From: Kelly Troyer > To: Rotary motors in aircraft > Sent: Friday, July 15, 2011 12:34 PM > Subject: [FlyRotary] Re: Ok Here are the important flywheel measurements >=20 > Dave and All, > =20 > Sounds encourageing...............Replacing the starter with turb= o model would seem to be > least expensive and safer than adding additional ring gear + welding......= ........I also echo what > Bill and Bobby have said concerning the Al Wick fix and getting Tracy's th= oughts about cause > of problem and perhaps need for periodic inspection and/or rubber isolator= replacement........=20 > =20 > Kelly Troyer > "DYKE DELTA JD2" (Eventually) > "13B ROTARY"_ Engine > "RWS"_RD1C/EC2/EM2 > "MISTRAL"_Backplate/Oil Manifold > "TURBONETICS"_TO4E50 Turbo >=20 > From: David Leonard > To: Rotary motors in aircraft > Sent: Thursday, July 14, 2011 11:41 PM > Subject: [FlyRotary] Ok Here are the important flywheel measurements >=20 > I finally got to the hangar and measured out my S5 turbo flywheel and the r= emains of my S5 flexplate. The results are very encouraging, even as good a= s the possibly could be to make the swap, but I only had ten min at the hang= ar before I had to leave to pick up my daughter from daycare, so they are on= e try and slightly sloppy... I make no guarantees. The height measurements o= f the flex plate were particularly suspect because, well, mine is all warped= and broken. >=20 > Ring Gear Diameter - Perfect fit. As we suspected, same size, same tooth s= pacing. >=20 > Ring Gear Fore-Aft Placement - As measured from the underside of the big n= ut. (for all further reference, aft means aft in the CAR). The flex plate p= uts the aft side of the ring gear 1.290 inches from the front of the big nut= . The flywheel puts it 0.913. So the flex plate puts the ring gear (appx) 0= .377 in. further aft. This is actually fortuitous because it just so happen= s that the ring gear thickness is .365 ... So all we have to do to fix th= e discrepancy is weld and extra ring gears onto to the flywheel ring gear an= d there will be teeth that the starter can reach:(bottom of the page.. the c= ost $80) > http://mazdatrix.com/flywheel.htm > It may also be possible to fix the discrepancy by changing the starter... w= ill look into that. >=20 > Damper Plate Placement - On the flywheel, the mounting surface is proud (o= r aft) of the ring gear. On the flex plate, the mounting surface is recesse= d (or forward) from the ring gear. A > nd it all pretty much works out. That position on the flywheel will vary s= omewhat depending on which flywheel you have and how much wear you have on t= he clutch slip surface. But on my (I assume well-worn) flywheel the placemen= t was 0.965 while the flex plate was 0.950. Pretty damn close and given mea= surement error it might me meant to be right on. Or, any difference could b= e made up by trimming down the spline on the damper plate or removing or add= ing spacers between the two. >=20 > So in my mind, a flywheel is the way to go. Stout, easy to get, pick your= weight, only mods seem to be drilling the mounting holes and welding on a s= econd gear ring. >=20 > --=20 > David Leonard >=20 >=20 >=20 >=20 >=20 >=20 > --=20 > David Leonard >=20 > Turbo Rotary RV-6 N4VY > http://N4VY.RotaryRoster.net > http://RotaryRoster.net --Apple-Mail-29--50176117 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8
Are you guys sure you can't put a space= r between counterweight and flywheel?  Remember you can delete the larg= e washer on the flywheel side of the RD-1x damper to help move it back. &nbs= p; Also be aware that the nose of the damper spline can be machined off to d= ecrease the needed room between flywheel and adapter plate.

Don't overcomplicate this thing!

Tracy
=
Sent from my iPad

On Jul 19, 2011, at 5:52 PM, David Leona= rd <wdleonard@gmail.com> wr= ote:

Yea, that is a b= ummer, but I was not very hopeful.  So we can weld an additional ring g= ear onto the face of the other, or machine our existing starters a= nd/or flex plates.  I will probably do the latter.  Won't be that b= ig of a deal I hope.  Thanks for being the parts consultant.  At l= east now you have a spare start to use should you ever need one.

David

On Tue, Jul 19, 2011 a= t 2:06 PM, Kelly Troyer <keltro@att.net> wrot= e:
Dave,
 
   Turbo starter is here..........Priliminary quick and= dirty measurements are 1.875 starter flange
to far end of unactivated starter (bendix) gear) which is 0.121 m= ore than your 1.754 number
and the same for all practical purposes considering probable= slight errors.............I do not have
1988 manual trans starter at the moment but will be at my hangar t= omorrow and will pick it up
to bring back with me for an in depth exam for any differences be= tween them............If there is
a difference I would think it would be in the starter gear as 198= 6-91 NA manual trans starter  
was used on a slightly smaller flywheel= although it has worked well on the larger auto trans
flexplate..........."Sigh".........Such is experimen= tal aviation and so much for "AS"umptions....<:)
 
Kelly Troyer
"DYKE DELTA JD2" (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil M= anifold
"TURBONETICS"_TO4E50 Turbo

From: David Leonard <= ;wdleonard@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Monday, July 18, 2= 011 11:28 PM

Subject: [FlyRotary] Re: Ok Here are the important flyw= heel measurements

Hi Kelly,
I already took Tracys plate into account. (I measured it at .520 in). &= nbsp;So it was 1.234 plus the .520 for the plate.  For ease, I measured= when the solenoid was NOT activated.  Crossing fingers, but ready to m= ill the plate and starter.... eh, I mean, hire someone to do it :-)

David

On Mon, Jul 18, 2011 at 9:14 PM, Kelly Troyer <keltro@att.net> wrote:
Dave,
 
   So adding the RD1X mount plate thickness 0.500 (1/2 i= nch) we have a measurement of approx 2.254 inch...........Tracy<= /div>
calls for a 1986 NA (86 to 91 are the same) manual transmiss= ion starter.............I do not know exactly what difference = ;the
turbo starter has except the turbo flywheel and automatic <= span>flex-plate are slightly larger in diameter and= have more ring gear
teeth than the 86-91 NA manual flywheel................There= was no turbo engine offered until 1987...........= ..I should have the
turbo starter in a few days so we can decide if it will be about 0= .375 in longer from mounting flange to end of the starter <= /div>
gear teeth when activated by the solenoid...........= ...Cross your fingers !!............<:) 
 
 
Kelly Troyer
"DYKE DELTA JD2" (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold
"TURBONETICS"_TO4E50 Turbo

From: David Leonard <= ;<= a href=3D"mailto:wdleonard@gmail.com">wdleonard@gmail.com>
= To: Rotary motors in aircraft &l= t;flyrotary@lancaironli= ne.net>
Sent: Monday, July 18, 2011 9= :34 PM
Subject: [FlyRotary= ] Re: Ok Here are the important flywheel measurements

Kelly, here is the starter measurement. This is the starter that Tracy r= ecommends, I forget which one that is.  =46rom the engine side of the m= ounting flange, to the far end of the tear tooth, I measure 1.754 - give or t= ake.=20

-- 
David Leonard

Turbo Rotary RV-6 N4VYhttp://N4VY.RotaryRoster.net<= /a>
http://RotaryRoster.net

On Mon, Jul 18, 2011 at 6:16 PM, Kelly Troyer <keltro@att.net> wrote:
Dave,
   While they are at it have them turn the pressure pla= te surface down to the pressure plate mounting
level so all of the rubber osolator is on a flat sur= face without a 0.018 step at the outer edge.......Or
you could put a washer under the drive plate (like the top washer= )............But this would put the drive
plate further forward on the input shaft splines the thickness of= the washer..........I do not khow if this
would pose a problem or not...........
 
Kelly Troyer
"DYKE DELTA JD2" (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold
"TURBONETICS"_TO4E50 Turbo

From: David Leonard <= ;<= a href=3D"mailto:wdleonard@gmail.com">wdleonard@gmail.com>
= To: Rotary motors in aircraft &l= t;flyrotary@lancaironli= ne.net>
Sent: Monday, July 18, 2011 7= :55 PM
Subject: [FlyRotary= ] Re: Ok Here are the important flywheel measurements

Well,  NOW you tell me...  :-)   Yea, that was goin= g to be an issues reguardless of which solution we chose. = I think I will bring mine to a machine shop and let them figure it out = ; :-)
 
--
David Leonard

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


On Mon, Jul 18, 2011 at 4:49 PM, Kelly Troyer <keltro@att.net> wrote:
Dave,
 
   Forgot to add that there are 3 clutch pressure plate= locating dowels in the flywheel.........You
will have to knock these out with a punch as their position will n= ot let you properly center the
RD1X drive plate and will not let the drive plate "Float" properl= y..............I have not come up
with a method yet to center the drive plate with the absolute acc= uracy needed for drilling the
flywheel for the drive plate attach bolts...........Maybe some of= the group with more machinists
skills than I can make a recommendation !!......= ............Also the rear of the attach bolt holes
will need to be spotfaced t= o provide a flat surface for the bolt head or nut and washer  from
what I have observed on the backside of my flywheel..= ......................<:)  
 
Kelly Troyer
"DYKE DELTA JD2" (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD= 1C/EC2/EM2
"MISTRAL"_Backplate/Oil= Manifold
"TURBONETICS"_TO4E50 Turbo
=

From: Kelly Troyer <= keltro@att.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>=
Sent: Monday, July 18, 2011 6= :29 PM
Subject: [FlyRotary= ] Ok Here are the important flywheel m= easurements

Dave,
   The link attached shows the prolit= e version (9.8 lbs) on the left in the photo...........= ..Do you have your starter flange
to gear measurement handy as my RD1X starter (not the t= urbo model) is 55 miles away at the moment........... <= /span>
 
 
Kelly Troyer
"DYKE DELTA JD2" (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD= 1C/EC2/EM2
"MISTRAL"_Backplate/Oil= Manifold
"TURBONETICS"_TO4E50 Turbo
=

From: David Leonard <= ;<= a href=3D"mailto:wdleonard@gmail.com">wdleonard@gmail.com>
= To: Rotary motors in aircraft &l= t;flyrotary@lancaironli= ne.net>
Sent: Monday, July 18, 2011 6= :18 PM
Subject: [FlyRotary= ] Re: Ok Here are the important flywh= eel measurements

OK Kelly,
 
Thanks to all your hard work and research, I have ordered up the = Prolite 9.8 lb version of this.  Decid= ed that I was done with the flex plates.  Thanks for locating a great p= rice.  I am a little nervous that the picture does not look right, but I= guess I can always return it.
Like you, I figure we will solve the starter issue one way or another.<= /div>
 
--
David Leonard

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


On Sat, Jul 16, 2011 at 2:21 PM, Kelly Troyer <keltro@att.net> wrote:
Dave and All,
 
          Ok Dave the "ACT" "Streetlite= " 13.8 lb flywheel was just delivered and I am in proce= ss of taking
your measurements to see where we stand................This flywh= eel is a thing of beauty (to a RotorHead)
and my RD1C drive plate will bolt to it with no problem (through d= rill and spotface the rear of the fly= wheel
because it has a slight taper in that area).............I just ha= ve to verify just where the RD1C drive splines
will be positioned (fore and aft) on the input shaft compared to t= he RX7 flexplate.............The clut= ch plate
friction area is slightly raised (about 0.065) above the clutch m= ount area and I would probably take it
down tto the clutch level (= probably not necessary but would reduce weight slightly.............I have a= 93-95
Turbo starter on the way (should take care of starter mesh proble= m)..............If you are interested I can
guide you to another 93-95 starter (used $49.00 with/shipping) if= it is still for sale.............
        One other thing at thi= s time..............The lighter 9.8 lb version may be usable but it is liste= d as 116
ring gear teeth and I have not found out what its diameter is and= what starter would be used with it......
        I suspect it may be th= e diameter of the NA 13B flywheels and may use the 86-91 NA manual tran= s
starter............You need to talk to the manufacturer..........= They are in Lancaster, Calif............The 9.8 lb
version is a little more expensive due to more extensive machine w= ork to reduce weight.............See the
link below............The link to THMotorsports= has the best price I have found on the 9.8 lb flywheel= ......The
photo on their page is not the Rotary 9.8 lb version...........&n= bsp;
 
 
 
 
Kelly Troyer
"DYKE DELTA JD2" (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD= 1C/EC2/EM2
"MISTRAL"_Backplate/Oil= Manifold
"TURBONETICS"_TO4E50 Turbo
=

From: Kelly Troyer <= keltro@att.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>=
Sent: Friday, July 15, 2011 1= 2:34 PM
Subject: [FlyRotar= y] Re: Ok Here are the important flyw= heel measurements

Dave and All,
 
         Sounds encourageing...............Replacing the start= er with turbo model would seem to be
least expensive and safer than adding additional ring gear + weld= ing..............I also echo what
Bill and Bobby have said concerning the Al Wick fix and getting T= racy's thoughts about cause
of problem and perhaps need for periodic inspection and/or rubber=  isolator replacement........ 
 
Kelly Troyer
"DYKE DELTA JD2" (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD= 1C/EC2/EM2
"MISTRAL"_Backplate/Oil= Manifold
"TURBONETICS"_TO4E50 Turbo
=

From: David Leonard <= ;<= a href=3D"mailto:wdleonard@gmail.com">wdleonard@gmail.com>
= To: Rotary motors in aircraft &l= t;flyrotary@lancaironli= ne.net>
Sent: Thursday, July 14, 2011= 11:41 PM
Subject: [FlyRot= ary] Ok Here are the important flywhe= el measurements

I finally got to the hangar and measured out my S5 turbo flywheel and t= he remains of my S5 flexplate.  T= he results are very encouraging, even as good as the possibly could be to ma= ke the swap, but I only had ten min at the hangar before I had to leave to p= ick up my daughter from daycare, so they are one try and slightly sloppy... I= make no guarantees.  The height measurements of the flex plate were pa= rticularly suspect because, well, mine is all warped and broken.

Ring Gear Diameter - Perfect fit.  As we suspected, same siz= e, same tooth spacing.

Ring Gear Fore-Aft Placement - As measu= red from the underside of the big nut. (for all further reference, aft means= aft in the CAR).  The flex plate puts the aft side of the ring gear 1.= 290 inches from the front of the big nut. The flywheel puts it 0.913.  S= o the flex plate puts the ring gear (appx) 0.377 in. further aft.  T= his is actually fortuitous because it just so happens that the ring gear thi= ckness is .365 ...    So all we have to do to fix the discrep= ancy is weld and extra ring gears onto to the flywheel ring gear and there w= ill be teeth that the starter can reach:(bottom of the page.. the cost $80)<= br> http://mazdatrix.com/flyw= heel.htm
It may also be possible to fix the discrepancy by changi= ng the starter... will look into that.

Damper Plate Placement -= On the flywheel, the mounting surface is proud (or aft) of the ring gear.&n= bsp; On the flex plate, the mounting surface is recessed (or forward) from t= he ring gear. A
nd it all pretty much works out.  That position on th= e flywheel will vary somewhat depending on which flywheel you have and how m= uch wear you have on the clutch slip surface. But on my (I assume well-worn)= flywheel the placement was 0.965 while the flex plate was 0.950.  Pret= ty damn close and given measurement error it might me meant to be right on.&= nbsp; Or, any difference could be made up by trimming down the spline on the= damper plate or removing or adding spacers between the two.

So in my mind, a flywheel is the way to go.  Stout, easy to get, pi= ck your weight, only mods seem to be drilling the mounting holes and welding= on a second gear ring.

--
David Leonard

=





--
David Leonard

Turbo R= otary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net
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