X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-vx0-f180.google.com ([209.85.220.180] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTPS id 5051243 for flyrotary@lancaironline.net; Thu, 14 Jul 2011 02:35:35 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.220.180; envelope-from=wdleonard@gmail.com Received: by vxd7 with SMTP id 7so5129223vxd.25 for ; Wed, 13 Jul 2011 23:34:59 -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=OwHSctiv20kkMsooOC52zTB1OQacBb9xjWByb+l93lU=; b=qGyCfgNPkNkJ6w+VnuEfrWbdEQb4WCO6vckn8FKVOuWsZFMw+i6Kmv85r28GtI90wg d+48rtDCPMjIp4vm0M1Cp3QeZDatIk11QhnsBCQPc7ImmYgkeFPdgVHJRz8M5klVJEo9 0EFtIDvSFNHvX+KVdx82H3A5g5gIcEHtJ7PcI= MIME-Version: 1.0 Received: by 10.52.176.164 with SMTP id cj4mr2188616vdc.56.1310625299061; Wed, 13 Jul 2011 23:34:59 -0700 (PDT) Received: by 10.52.101.225 with HTTP; Wed, 13 Jul 2011 23:34:59 -0700 (PDT) In-Reply-To: References: Date: Wed, 13 Jul 2011 23:34:59 -0700 Message-ID: Subject: Re: [FlyRotary] Re: Flywheel sizes From: David Leonard To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=bcaec5015d03625c7504a801bb50 --bcaec5015d03625c7504a801bb50 Content-Type: text/plain; charset=ISO-8859-1 So to clarify: There are 2 different fly wheels (use with manual transmissions) and 2 different flex plates (used with automatic transmissions). Divided thus: "non-turbo" flywheel - used with all manual n.a. RX-7s This is smaller diameter than: "turbo" flywheel - used with all turbo RX-7s and all RX-8's RX7 flex plate - used with all auto RX7's RX-8 flex plate - used with all auto RX-8s (and there is a cosmo flex plate as well) -- the flex plates require the appropriate counter weight and that supplies the 6-bolt holes -- The fly wheels have the counter weight built in so there is no 6-bolt pattern and the large nut goes on the flywheel instead of the counter weight .. unless you are using an aftermarket flywheel, in which case most will bolt up to the counter weight. The aftermarket flywheels come in many different weights and materials. Tracy used the RX-7 flex plate and his damper plate will not directly fit on the RX8 flex plate or either of the flywheels. The flywheels put the ring gear in different locations from each other, with the n/a RX7 being smaller than the Turbo RX7/RX8. But I have not been able to figure where the RX7 auto flex plate puts the ring gear in relation to the flywheels or the RX8 flexplate (though it seems to have the same number of teeth as the turbo RX7/RX8 flywheel) Tomorrow afternoon I will be able to get to the hangar and let you know the size of the -7 flex plate relative turbo flywheel. Since the flywheels are already really beefy, I was hoping there might be an easy adaptation of one that would put the ring gear and damper plate in the right spot... but that is seeming more and more unlikely. -- David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net On Wed, Jul 13, 2011 at 10:39 PM, Dave wrote: > ** > On 7/14/2011 12:32 AM, Dave wrote: > > On 7/14/2011 12:21 AM, Dave wrote: > > I believe the manual flywheel has an integral counterweight that precludes > mounting the PSRU. The auto flex plate has 4 evenly spaced holes that the > PSRU mates with. > > > Here is a picture of the RD-1 damper nested into the auto flex-plate with > the bushing holes offset slightly from the dimple and mounting hole. > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html > > > Actually, my bad, this was the IMPROPER auto flex plate, as evidenced by > the radial mismatch between the bushing holes and the dimples.... I've got > hundreds of pictures from the teardown and build... I probably should make a > CD of them or something. > > --bcaec5015d03625c7504a801bb50 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
So to clarify:=A0

There are 2 different fly w= heels (use with manual transmissions) and 2 different flex plates (used wit= h automatic transmissions). =A0Divided thus:

"= ;non-turbo" flywheel - used with all manual n.a. RX-7s =A0This is smal= ler diameter than:
"turbo" flywheel - used with all turbo RX-7s and all RX-8= 9;s
RX7 flex plate - used with all auto RX7's
RX-8 = flex plate - used with all auto RX-8s (and there is a cosmo flex plate as w= ell)
=A0 -- the flex plates require the appropriate counter weight and that= supplies the 6-bolt holes
=A0 -- The fly wheels have the counter= weight built in so there is no 6-bolt pattern and the large nut goes on th= e flywheel instead of the counter weight .. unless you are using an afterma= rket flywheel, in which case most will bolt up to the counter weight. =A0Th= e aftermarket flywheels come in many different weights and materials.

Tracy used the RX-7 flex plate and his damper plate wil= l not directly fit on the RX8 flex plate or either of the flywheels. =A0The= flywheels put the ring gear in different locations from each other, with t= he n/a RX7 being smaller than the Turbo RX7/RX8. =A0

But I have not been able to figure where the RX7 auto f= lex plate puts the ring gear in relation to the flywheels or the RX8 flexpl= ate (though it seems to have the same number of teeth as the turbo RX7/RX8 = flywheel)

Tomorrow afternoon I will be able to get to the hangar = and let you know the size of the -7 flex plate relative turbo flywheel. =A0= Since the flywheels are already really beefy, I was hoping there might be a= n easy=A0adaptation=A0of one that would put the ring gear and damper plate = in the right spot... =A0but that is seeming more and more unlikely. =A0

--=A0
David Leonard

Turbo Rotary RV-6 N4VYhttp://N4VY.RotaryRoster.net<= br>http://RotaryRoster.net
On Wed, Jul 13, 2011 at 10:39 PM, Dave <david.staten@gmail.com> wrote:
=20 =20 =20 =20
On 7/14/2011 12:32 AM, Dave wrote:
=20 On 7/14/2011 12:21 AM, Dave wrote:
=20 =20 I believe the manual flywheel has an integral counterweight that precludes mounting the PSRU. The auto flex plate has 4 evenly spaced holes that the PSRU mates with.

Here is a picture of the RD-1 damper nested into the auto flex-plate with the bushing holes offset slightly from the dimple and mounting hole. 


--
Homepage:  http://w=
ww.flyrotary.com/
Archive and UnSub:   http://mail.lancaironline.net:81/lists/f=
lyrotary/List.html

Actually, my bad, this was the IMPROPER auto flex plate, as evidenced by the radial mismatch between the bushing holes and the dimples.... I've got hundreds of pictures from the teardown and build... I probably should make a CD of them or something.


--bcaec5015d03625c7504a801bb50--