X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-iy0-f180.google.com ([209.85.210.180] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTPS id 5052398 for flyrotary@lancaironline.net; Fri, 15 Jul 2011 01:56:39 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.210.180; envelope-from=fluffysheap@gmail.com Received: by iyh42 with SMTP id 42so785345iyh.25 for ; Thu, 14 Jul 2011 22:56:03 -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=SO1oGfvHX4BKD6VCnzOLkHNo6Tl1UT1eNXNHuQcdH8g=; b=NKOVwWWz9HrDZgFXxbDPeePDmMvJnp3eAweTJ61gtAItFc/+mmxPIiJFhAegdsN4c1 MoOBKLRLtpEQN24OrNFzrImeYXD/rmXcpKwKlD0jdBbEaMPNy/5bag37dFuru9bsLKL/ eem5IXkMSN0H/cENHqpb6bbFFFbEBN7WoQFDc= MIME-Version: 1.0 Received: by 10.231.83.67 with SMTP id e3mr2706762ibl.78.1310709363353; Thu, 14 Jul 2011 22:56:03 -0700 (PDT) Received: by 10.231.156.82 with HTTP; Thu, 14 Jul 2011 22:56:03 -0700 (PDT) In-Reply-To: References: Date: Thu, 14 Jul 2011 23:56:03 -0600 Message-ID: Subject: Re: [FlyRotary] Ok Here are the important flywheel measurements From: William Wilson To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=000e0cd4b37401a7d804a8154ea4 --000e0cd4b37401a7d804a8154ea4 Content-Type: text/plain; charset=ISO-8859-1 I'd recommend getting a turbo starter to go with the turbo flywheel. It should bolt right on. The flywheel assembly spins pretty fast and needs to be balanced, I wouldn't trust welding there, or at least not MY welding :) I think starters are physically interchangeable for all turbo cars from 86 on plus RX-8s, but to be absolutely sure you could also match the series of car. (You can probably find an RX-8 in a local junkyard). On Thu, Jul 14, 2011 at 10:41 PM, David Leonard wrote: > I finally got to the hangar and measured out my S5 turbo flywheel and the > remains of my S5 flexplate. The results are very encouraging, even as good > as the possibly could be to make the swap, but I only had ten min at the > hangar before I had to leave to pick 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 particularly suspect because, well, mine > is all warped and broken. > > *Ring Gear Diameter* - Perfect fit. As we suspected, same size, same > tooth spacing. > > *Ring Gear Fore-Aft Placement* - As measured 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. So the flex plate puts the ring gear > (appx) 0.377 in. further aft. This is actually fortuitous because it just > so happens that the ring gear thickness is .365 ... So all we have to do > to fix the discrepancy is weld and extra ring gears onto to the flywheel > ring gear and there will be teeth that the starter can reach:(bottom of the > page.. the cost $80) > http://mazdatrix.com/flywheel.htm > It may also be possible to fix the discrepancy by changing the starter... > will look into that. > > *Damper Plate Placement* - On the flywheel, the mounting surface is proud > (or aft) of the ring gear. On the flex plate, the mounting surface is > recessed (or forward) from the ring gear. And it all pretty much works out. > That position on the flywheel will vary somewhat depending on which flywheel > you have and how much 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. Pretty damn close and given measurement error it might me meant to > be right on. 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, pick your > weight, only mods seem to be drilling the mounting holes and welding on a > second gear ring. > > -- > David Leonard > > Turbo Rotary RV-6 N4VY > http://N4VY.RotaryRoster.net > http://RotaryRoster.net > --000e0cd4b37401a7d804a8154ea4 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable I'd recommend getting a turbo starter to go with the turbo flywheel.=A0= It should bolt right on.=A0 The flywheel assembly spins pretty fast and ne= eds to be balanced, I wouldn't trust welding there, or at least not MY = welding :)=A0 I think starters are physically interchangeable for all turbo= cars from 86 on plus RX-8s, but to be absolutely sure you could also match= the series of car.=A0 (You can probably find an RX-8 in a local junkyard).=

On Thu, Jul 14, 2011 at 10:41 PM, David Leon= ard <wdleonard@= gmail.com> wrote:
I finally got to the hangar and measured out my S5 turbo flywheel and the r= emains of my S5 flexplate.=A0 The results are very encouraging, even as goo= d as the possibly could be to make the swap, but I only had ten min at the = hangar before I had to leave to pick up my daughter from daycare, so they a= re one try and slightly sloppy... I make no guarantees.=A0 The height measu= rements of the flex plate were particularly suspect because, well, mine is = all warped and broken.

Ring Gear Diameter - Perfect fit.=A0 As we suspected, same size,= same tooth spacing.

Ring Gear Fore-Aft Placement - As measur= ed from the underside of the big nut. (for all further reference, aft means= aft in the CAR).=A0 The flex plate puts the aft side of the ring gear 1.29= 0 inches from the front of the big nut. The flywheel puts it 0.913.=A0 So t= he flex plate puts the ring gear (appx) 0.377 in. further aft.=A0 This is a= ctually fortuitous because it just so happens that the ring gear thickness = is .365 ...=A0=A0=A0 So all we have to do to fix the discrepancy is weld an= d extra ring gears onto to the flywheel ring gear and there will be teeth t= hat the starter can reach:(bottom of the page.. the cost $80)
http://mazd= atrix.com/flywheel.htm
It may also be possible to fix the discrepanc= y by changing the starter... will look into that.

Damper Plate Pl= acement - On the flywheel, the mounting surface is proud (or aft) of th= e ring gear.=A0 On the flex plate, the mounting surface is recessed (or for= ward) from the ring gear. And it all pretty much works out.=A0 That positio= n on the flywheel will vary somewhat depending on which flywheel you have a= nd how much wear you have on the clutch slip surface. But on my (I assume w= ell-worn) flywheel the placement was 0.965 while the flex plate was 0.950.= =A0 Pretty damn close and given measurement error it might me meant to be r= ight on.=A0 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.=A0 Stout, easy to get, pick= your weight, only mods seem to be drilling the mounting holes and welding = on a second gear ring.

--
David Leonard<= br>
Turbo Rotary RV-6 N4VY
http://N4VY.Rota= ryRoster.net
h= ttp://RotaryRoster.net

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