Return-Path: Received: from [24.25.9.102] (HELO ms-smtp-03-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 618288 for flyrotary@lancaironline.net; Sun, 23 Jan 2005 10:41:58 -0500 Received-SPF: none receiver=logan.com; client-ip=24.25.9.102; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-185-127.carolina.rr.com [24.74.185.127]) by ms-smtp-03-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id j0NFfPkd000399 for ; Sun, 23 Jan 2005 10:41:26 -0500 (EST) Message-ID: <003801c50162$4e4f74a0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: flex plate Date: Sun, 23 Jan 2005 10:43:37 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0035_01C50138.6542A530" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0035_01C50138.6542A530 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Paul, My understanding (Leon, Lynn, jump right in) is that so long as the = rotors and counterweights are matched you are OK. The flex plate has = much less mass than the manual transmission flywheel (like 1-2 lbs vs 30 = lbs). I have an 86 eccentric shaft in my 91 turbo block so it appears = that you are Ok there as well. The triangular shaped item in the Ross = drive contains the spline shaft that the shaft from the gear box is = driven by. The flex plate is bolted to the eccentric shaft by the = infamous large "Flywheel Nut". The triangular shape thing with the = springs is bolted to the flex plate. I think the springs were viewed by = Lou Ross as the "dampner" but of course springs do not dampen. Never had = any problem with that part of the Ross drive. The regular flex plate = measure 12 7/8" dia (as best I recall), the smaller on is right at 12" = dia. A Ross drive could have either one. Where it makes a difference = is how your starter would/would not align with the flywheel teeth. If = your Ross uses the smaller flex plate then a regular one may not work = for you - you may be stuck with the smaller one. However, some of the = Ross drives had considerable adjustment of the starter - so it may still = work. You'll just have to trial fit to see. Ed A ----- Original Message -----=20 From: Paul=20 To: Rotary motors in aircraft=20 Sent: Sunday, January 23, 2005 10:09 AM Subject: [FlyRotary] Re: flex plate Thanks, Ed. I have to admit that I am still not certain that I = understand everything I need to know about the flex plates, etc. Here = is my scenario....I have a street ported 4 port turbo block that I am = building up with NA rotors and housings. The rotors and housings are = coming from an engine I just acquired that is from a car that had a = standard transmission. I'm assuming I can use the rotors, eccentric = shaft, and counterweights...but can I use this flywheel? Or do I need a = flywheel and counterweights that were specifically made for an = automatic? Or are we saying that that little triangular shaped item = with the springs in it is the flex plate and can be mounted on any = flywheel? Sorry for the barrage of questions.....I just don't have = quite enough information to ask intelligent questions yet. Thanks for = trying to educate me. Paul Conner ----- Original Message -----=20 From: Ed Anderson=20 To: Rotary motors in aircraft=20 Sent: Saturday, January 22, 2005 6:47 AM Subject: [FlyRotary] Re: flex plate I had a Ross drive that used the smaller flexplates - almost 1" = smaller in diameter than the 13B. I almost used it as an alignment for = the starter position when I modified Tracy's Mounting plate for my Plugs = Up installation - fortunately before cutting metal I measure the flex = plate on a 13B sitting in my shop and found it was 1" larger in = diameter. Ed Anderson ----- Original Message -----=20 From: Kelly Troyer=20 To: Rotary motors in aircraft=20 Sent: Friday, January 21, 2005 11:37 PM Subject: [FlyRotary] Re: flex plate OK Paul, I have been out of town so may be late with this info !! = Ross used the flexplates from the 12A to 1973 and (some 1974) top = mounted starter rotary engines until they became hard to find....Then they = started=20 making them from aluminum and adding a ring gear for the starter = !! These flexplates are smaller in diameter than the later ones......FWIW -- Kelly Troyer=20 Dyke Delta/13B/RD1C/EC2=20 > > > On Mon, 17 Jan 2005 09:44:03 -0600=20 > > > "Paul" wrote:=20 > > >=20 > > >> OK....I am going to openly display my ignorance here....I = had my=20 > > >Ross > PSRU off only one time, when I had the thrust bearing = mod=20 > > >done. I > simply reinstalled it opposite of how I took it = off. That=20 > > >was some > time ago, and I can't recall what it looked like = where it=20 > > >mated to the > flywheel. Did the Ross also use an auto flex = plate?=20 > > >I remember the > shaft was splined. That's about all I = recall. I am=20 > > >asking this, > because I have purchased a set of street = ported 4-port=20 > > >plates to which > I will add a set of NA rotors and housings = to build=20 > > >up a complete > engine so I will les! sen my "downtime" by = hopefully=20 > > >swapping engines on > a weekend. I would like to have this = new engine=20 > > >ready to bolt on and > run. I'm assuming that the stock, cast = iron=20 > > >flywheel I have if from > a standard transmission RX7. Are = the=20 > > >automatic and standard flywheels > different, or do you just = add an=20 > > >automatic transmission flex plate to > the cast iron flywheel = I=20 > > >already have? Just when I thought I had > everything figured = out, I=20 > > >start reading new posts about flex > plates....=20 > > >> Thanks in advance for any and all replies/suggestions. = Paul,=20 > > >> what the heck is a flexplate, Conner=20 -------------------------------------------------------------------------= - >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html -------------------------------------------------------------------------= --- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.7.1 - Release Date: 1/19/2005 -------------------------------------------------------------------------= ----- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.7.1 - Release Date: 1/19/2005 -------------------------------------------------------------------------= ----- >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_0035_01C50138.6542A530 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Paul,
 
My understanding (Leon, Lynn, jump = right in) is=20 that so long as the rotors and counterweights are matched you are = OK.  The=20 flex plate has much less mass than the manual transmission flywheel = (like 1-2=20 lbs vs 30 lbs).  I have an 86 eccentric shaft in my 91 turbo block = so it=20 appears that you are Ok there as well.  The triangular shaped item = in the=20 Ross drive contains the spline shaft that the shaft from the gear box is = driven=20 by.  The flex plate is bolted to the eccentric shaft by the = infamous large=20 "Flywheel Nut".  The triangular shape thing with the springs is = bolted to=20 the flex plate.  I think the springs were viewed by Lou Ross as the = "dampner" but of course springs do not dampen. Never had any = problem with=20 that part of the Ross drive. The regular flex plate measure 12 7/8" dia = (as best=20 I recall), the smaller on is right at 12" dia.  A Ross drive could = have=20 either one.  Where it makes a difference is how your starter = would/would=20 not align with the flywheel teeth. If your Ross uses the smaller = flex plate=20 then a regular one may not work for you - you may be stuck with the = smaller=20 one.  However, some of the Ross drives had considerable adjustment = of the=20 starter - so it may still work.  You'll just have to trial fit to=20 see.
 
 
Ed A
----- Original Message -----
From:=20 Paul=20
Sent: Sunday, January 23, 2005 = 10:09=20 AM
Subject: [FlyRotary] Re: flex = plate

Thanks, Ed.  I have to admit = that I am still=20 not certain that I understand everything I need to know about the flex = plates,=20 etc.  Here is my scenario....I have a street ported 4 port turbo = block=20 that I am building up with NA rotors and housings. The rotors and = housings are=20 coming from an engine I just acquired that is from a car that had a = standard=20 transmission. I'm assuming I can use the rotors, eccentric shaft, and=20 counterweights...but can I use this flywheel?  Or do I need a = flywheel=20 and counterweights that were specifically made for an automatic?  = Or are=20 we saying that that little triangular shaped item with the springs in = it is=20 the flex plate and can be mounted on any flywheel?  Sorry for the = barrage=20 of questions.....I just don't have quite enough information to ask = intelligent=20 questions yet.  Thanks for trying to educate me.  Paul=20 Conner
 
----- Original Message -----
From:=20 Ed Anderson
To: Rotary motors in = aircraft=20
Sent: Saturday, January 22, = 2005 6:47=20 AM
Subject: [FlyRotary] Re: flex = plate

I had a Ross drive that used the = smaller=20 flexplates - almost 1" smaller in diameter than the 13B.  I = almost used=20 it as an alignment for the starter position when I modified Tracy's = Mounting=20 plate for my Plugs Up installation - fortunately before cutting = metal I=20 measure the flex plate on a 13B sitting in my shop and found it was = 1"=20 larger in diameter.
 
Ed Anderson
----- Original Message ----- =
From:=20 Kelly = Troyer=20
To: Rotary motors in = aircraft=20
Sent: Friday, January 21, = 2005 11:37=20 PM
Subject: [FlyRotary] Re: = flex=20 plate

OK Paul, I have been out of town so may be late with this = info !!=20 Ross
used the flexplates from the 12A to 1973 = and  (some=20 1974) top mounted
starter rotary engines until they became hard to find....Then = they=20 started
making them from aluminum and adding a ring gear for the = starter !!=20 These
flexplates are smaller in diameter than the later=20 ones......FWIW
--
Kelly Troyer
Dyke=20 Delta/13B/RD1C/EC2 

> > > On Mon, 17 Jan 2005 = 09:44:03 -0600
> > > "Paul" = wrote:=20
> > >
> > >> OK....I am going to = openly=20 display my ignorance here....I had my
> > >Ross > = PSRU off=20 only one time, when I had the thrust bearing mod
> > = >done. I=20 > simply reinstalled it opposite of how I took it off. That =
>=20 > >was some > time ago, and I can't recall what it looked = like=20 where it
> > >mated to the > flywheel. Did the = Ross also=20 use an auto flex plate?
> > >I remember the > = shaft was=20 splined. That's about all I recall. I am
> > >asking = this,=20 > because I have purchased a set of street ported 4-port =
> >=20 >plates to which > I will add a set of NA rotors and = housings to=20 build
> > >up a complete > engine so I will les! = sen my=20 "downtime" by hopefully
> > >swapping engines on > = a=20 weekend. I would like to have this new engine
> > = >ready to=20 bolt on and > run. I'm assuming that the stock, cast iron =
> >=20 >flywheel I have if from > a standard transmission RX7. Are = the=20
> > >automatic and standard flywheels > different, = or do=20 you just add an
> > >automatic transmission flex = plate to=20 > the cast iron flywheel I
> > >already have? Just = when I=20 thought I had > everything figured out, I
> > = >start=20 reading new posts about flex > plates....
> > = >> Thanks=20 in advance for any and all replies/suggestions. Paul,
> = >=20 >> what the heck is a flexplate, Conner

>>  Homepage: =20 http://www.flyrotary.com/
>>  Archive:  =20 = http://lancaironline.net/lists/flyrotary/List.html

No virus found in this incoming message.
Checked by AVG=20 Anti-Virus.
Version: 7.0.300 / Virus Database: 265.7.1 - Release = Date:=20 1/19/2005

No virus found in this outgoing message.
Checked by AVG=20 Anti-Virus.
Version: 7.0.300 / Virus Database: 265.7.1 - Release = Date:=20 1/19/2005

>>  Homepage: =20 http://www.flyrotary.com/
>>  Archive:  =20 = http://lancaironline.net/lists/flyrotary/List.html
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