X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail01.syd.optusnet.com.au ([211.29.132.182] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTPS id 911915 for flyrotary@lancaironline.net; Fri, 22 Apr 2005 21:41:25 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.132.182; envelope-from=lendich@optusnet.com.au Received: from george (d211-31-92-158.dsl.nsw.optusnet.com.au [211.31.92.158]) by mail01.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id j3N1eW7Q010072 for ; Sat, 23 Apr 2005 11:40:34 +1000 Message-ID: <000b01c547a5$fbe34a40$9e5c1fd3@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: All Parts have arrived, Whew! Date: Sat, 23 Apr 2005 11:44:26 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0008_01C547F9.CCEA67B0" 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 This is a multi-part message in MIME format. ------=_NextPart_000_0008_01C547F9.CCEA67B0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Ed, Good thinking and good to get the feed-back. I do believe we are starting to see a trend, in regard to apex seal slot = wear. I believe the problem is that it's starting to give the rotary, = for Aviation use, a bad name, and it's the sort of thing that could = easily do it. When you think about it, too much slop is going to aggravate the apex = seal side wear, which could have resulted in those chatter marks. George ( down under) George, the rotor housings had some wear - but no gouges or groves, no = missing chrome - so they were probably OK to reuse again. However, = there was what appeared to be "chatter" wear - strips across the chrome = at regular intervals. When you rubbed your fingers along them I could = detect a faint wave like pattern (valleys and peaks). So decided with = new rotors and seals to go with new rotor housings. Those were used = ones and who knows how many miles they might have had. =20 Well, I was quite surprised at the amount of wear on the seals - they = were brand new 150 hours ago but the seals were badly grooved and worn - = now I am certain that wear was greatly accelerated by the poor condition = of the seal slots - but still. In any case, new stronger seals are = going to be used next - as well as additional of an air filter. I = personally don't think an airfilter would have made any difference in = the apex seal breaking - but, I also noticed that the rotor metal oil = rings were worn outside the specs and they were new 150 hours ago. So I = do believe I have had some accelerated wear due to the dust in and = around my hangar over the past two years. Since a filter is cheap, I'm = going to stick one on. Ed ----- Original Message -----=20 From: George Lendich=20 To: Rotary motors in aircraft=20 Sent: Friday, April 22, 2005 6:23 PM Subject: [FlyRotary] Re: All Parts have arrived, Whew! Ed, Were the old housing junked because you spat the apex seals? I just got a report that one bloke in Victoria Aust is only getting = 200 hrs out of new seals before they break - I wonder if it's the same = problem? I'm pretty sure it is! George ( down under) Ok, folks, the fun begins. Got the last of the parts in today, so = can start the assembly tomorrow. Waited for UPS to deliver the oil = control rings all day - so was down in the dumps when 1600 rolled around = and no UPS truck. So maundered down to the mail box and their wedged = into its opening was a USPS package - not UPS!=20 Going to sit down tonight with a bowl of pop corn and watch Bruce = T perform the assembly part. I noticed that the transcript did not = have anything on the reassembly - so assume that I either got tired of = listening to Bruce, figured that the assembly was just the reverse of = the disassembly - or lost that part. Got all the rotor parts in plastic sandwich bags marked for which = rotor, which side of rotor and which apex. For most parts it really = doesn't matter but, for instance, is very important when replacing the = oil control seals to put the springs back correctly according to = direction of rotation and side of the rotor. Also important on the side = seals to get them in the right slot or else all that work trimming the = side seals to get that precision fit is lost. First time I've actually had new rotors and housings - I like the = looks - though not necessarily what they cost. But, Bruce gave the best = price out of three quotes I got. Just wanted you to know. Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com ------=_NextPart_000_0008_01C547F9.CCEA67B0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Ed,
Good thinking and good to get the=20 feed-back.
I do believe we are starting to see a = trend, in=20 regard to apex seal slot wear. I believe the problem is that it's = starting=20 to give the rotary, for Aviation use, a bad name, and it's the sort of = thing=20 that could easily do it.
When you think about it, too much slop = is going to=20 aggravate the apex seal side wear, which could have resulted = in those=20 chatter marks.
George ( down under)
George, the rotor housings had some = wear - but no=20 gouges or groves, no missing chrome - so they were probably OK to = reuse=20 again.  However, there was what appeared to be "chatter" wear - = strips=20 across the chrome at regular intervals.  When you rubbed your = fingers=20 along them I could detect a faint wave like pattern (valleys and = peaks). =20 So decided with new rotors and seals to go with new rotor = housings. =20 Those were used ones and who knows how many miles they might have = had. =20
 
Well, I was quite surprised at the = amount of wear=20 on the seals -  they were brand new 150 hours ago but the seals = were=20 badly grooved and worn - now I am certain that wear was greatly = accelerated by=20 the poor condition of the seal slots - but still.  In any case, = new=20 stronger seals are going to be used next - as well as additional of an = air=20 filter.  I personally don't think an airfilter would have made = any=20 difference in the apex seal breaking - but, I also noticed that the = rotor=20 metal oil rings were worn outside the specs and they were new 150 = hours=20 ago.  So I do believe I have had some accelerated wear due to the = dust in=20 and around my hangar over the past two years.  Since a filter is = cheap,=20 I'm going to stick one on.
 
Ed
----- Original Message -----
From:=20 George Lendich
To: Rotary motors in = aircraft=20
Sent: Friday, April 22, 2005 = 6:23=20 PM
Subject: [FlyRotary] Re: All = Parts have=20 arrived, Whew!

Ed,
Were the old housing junked because = you spat=20 the apex seals?
 
I just got a report that one bloke = in Victoria=20 Aust is only getting 200 hrs out of new seals before they break - I = wonder=20 if it's the same problem? I'm pretty sure it is!
 
George ( down under)
Ok, folks, the fun begins.  = Got the last=20 of the parts in today, so can start the assembly = tomorrow. Waited for=20 UPS to deliver the oil control rings all day - so was down in = the=20 dumps when 1600 rolled around and no UPS truck.  So = maundered=20 down to the mail box and their wedged into its opening was a = USPS=20 package - not UPS! 
 
Going to sit down tonight with a = bowl of pop=20 corn and watch Bruce T perform the assembly part.   I = noticed=20 that the transcript did not have anything on the reassembly - so = assume=20 that I either got tired of listening to Bruce, figured that the = assembly=20 was just the reverse of the disassembly - or lost that = part.
 
Got all the rotor parts in = plastic sandwich=20 bags marked for which rotor, which side of rotor and which = apex.  For=20 most parts it really doesn't matter but, for instance, is very = important=20 when replacing the oil control seals to put the springs back = correctly=20 according to direction of rotation and side of the rotor.  = Also=20 important on the side seals to get them in the right slot or else = all that=20 work trimming the side seals to get that precision fit is=20 lost.
 
First time I've actually had new = rotors and=20 housings - I like the looks - though not necessarily what = they=20 cost. But,  Bruce gave the best price out of three = quotes I=20 got.  Just wanted you to know.
 
Ed
 
 
Ed Anderson
Rv-6A N494BW = Rotary=20 Powered
Matthews, NC
eanderson@carolina.rr.com
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