Return-Path: Received: from sccrmhc11.comcast.net ([204.127.202.55] verified) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 618430 for flyrotary@lancaironline.net; Sun, 23 Jan 2005 12:56:29 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.202.55; envelope-from=jesse@jessfarr.com Received: from office5 (pcp04959909pcs.midval01.tn.comcast.net[68.59.199.44]) by comcast.net (sccrmhc11) with SMTP id <2005012317555701100clkfbe>; Sun, 23 Jan 2005 17:55:57 +0000 Message-ID: <01e401c50174$af0d0f70$057ba8c0@farr.com> From: "jesse farr" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: flex plate Date: Sun, 23 Jan 2005 12:55:11 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_01E1_01C5014A.C6079300" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_01E1_01C5014A.C6079300 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageI would suggest the change of things is what requires = re-balancing, whenever you put together an engine that has changed = rotating parts; or, at least, it should. Many seem to think rotaries = don't need such arcane and esoteric stuff as much as piston type stuff. = I don't know enough to get into those arguments; but, it seems that = putting together this rotor, that rotor, this flywheel with that = flywheel or automatic flex plate and this or that balance weight and = bolting a drive adaptor made from a partially disassmbled cluch plate = center would tend to not fall with balance specs too well, imho. I can = only suggest, especially, since I am told rotary balancing is sort of a = black art, at best, that this would tend to fall within the out of = balance range sufficient to notice and/or cause a problem, even more = than the trading of pulleys, flywheels, harmonic balancers, etc. on some = gm products . I would even suggest the bolting up of the drive adapter = to a specific/same flex plate or flywheel, just not in the same mounting = position will change things. Those who have already done these things = can tell you if it is enough to cause any concern or wheher they are = still harmonically smooth enough to be no problem, at least for them. = Now whether you are comfortable with it is up to the individual. jofarr ----- Original Message ----- From: Russell Duffy=20 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. =20 Hi Paul, Maybe I'm missing something, but why do you need to know anything = about flex plates for your engine swap? Aren't you going to install the = Ross drive on the new engine? If so, wouldn't you also move the Ross = drive plate (with the springs) and or flex plate at the same time? I = just don't see why you need anything new. ------=_NextPart_000_01E1_01C5014A.C6079300 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
I would suggest the change of things is = what=20 requires re-balancing, whenever you put together an engine that has = changed=20 rotating parts; or, at least, it should.  Many seem to think = rotaries don't=20 need such arcane and esoteric stuff as much as piston type stuff. I = don't know=20 enough to get into those arguments; but, it seems that putting together = this=20 rotor, that rotor, this flywheel with that flywheel or automatic flex = plate and=20 this or that balance weight and bolting a drive adaptor made from a = partially=20 disassmbled cluch plate center would tend to not fall with balance specs = too=20 well, imho.  I can only suggest, especially, since I am told rotary = balancing is sort of a black art, at best, that this would tend to fall = within=20 the out of balance range sufficient to notice and/or cause a problem, = even more=20 than the trading of pulleys, flywheels, harmonic balancers, etc. on = some gm=20 products .  I would even suggest the bolting up of the drive = adapter to a=20 specific/same flex plate or flywheel, just not in the same = mounting=20 position will change things.  Those who have already done these = things can=20 tell you if it is enough to cause any concern or wheher they are still=20 harmonically smooth enough to be no problem, at least for them.  = Now=20 whether you are comfortable with it is up to the = individual.
jofarr
----- Original Message ----- = From: Russell=20 Duffy

Thanks, Ed.  I have to = admit that I am=20 still not certain that I understand everything I need to know about = the flex=20 plates, etc.   
 
Hi Paul,
 
Maybe I'm missing something, but why do you = need to know=20 anything about flex plates for your engine swap?  Aren't you = going=20 to install the Ross drive on the new engine?  If so, = wouldn't=20 you also move the Ross drive plate (with the springs) and or = flex=20 plate at the same time?  I just don't see why you need = anything=20 new.   =
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