X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail03.syd.optusnet.com.au ([211.29.132.184] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTPS id 900246 for flyrotary@lancaironline.net; Wed, 20 Apr 2005 17:27:41 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.132.184; envelope-from=lendich@optusnet.com.au Received: from george (d211-31-69-134.dsl.nsw.optusnet.com.au [211.31.69.134]) by mail03.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id j3KLQp0O008437 for ; Thu, 21 Apr 2005 07:26:53 +1000 Message-ID: <003601c545f0$349dc6b0$86451fd3@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: New Rotors! Date: Thu, 21 Apr 2005 07:30:41 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0033_01C54644.05CAE2B0" 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_0033_01C54644.05CAE2B0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Ken, Apart from the apex seals, the side seals are different ( they are tapered). The Oil rings are the same size but may be different materials ( = different part numbers) to withstand the side exhaust heat.=20 The corner seals are the same size but different materials ( harder) and = chop up earlier model housings. The springs may be different material? But their all cheaper than the RX7 parts. The Procedure is to recut the apex seal slots and use the older oil = seals and springs. George ( down under) ----- Original Message -----=20 From: kenpowell@comcast.net=20 To: Rotary motors in aircraft=20 Sent: Wednesday, April 20, 2005 11:46 PM Subject: [FlyRotary] Re: New Rotors! Ed, What pieces are different for the RX8 rotors besides the apex seals? Ken Powell=20 Bryant, Arkansas=20 501-847-4721 -------------- Original message --------------=20 Yes, Indeed! Started putting the rotor pieces together last night, = the used side seals all give very good tolerances. I had to change some = from the slots they were in on the old rotors, but juggling them around = I could match the seal length to the slot quite well. Glad I could as = you have to trim the stock side seals for your fit - a tedious task at = best. I was a bit dismayed to find that the tolerance on my oil control = rings wear were at or outside of specs after only 150 hours. Again, = this could be accelerated wear due to ingesting the dust around my = hangar. So had to order some more. A filter will be next on the list. Interestingly in the basic kit you get through Tracy, they provide a = length of rubber channel tube that you cut your corner seal rubber plugs = out of. ----- Original Message -----=20 From: Steve Brooks=20 To: Rotary motors in aircraft=20 Sent: Wednesday, April 20, 2005 7:48 AM Subject: [FlyRotary] Re: New Rotors! Ed, Sounds like the fun is ready to begin. Steve Brooks -----Original Message----- From: Rotary motors in aircraft = [mailto:flyrotary@lancaironline.net]On Behalf Of Ed Anderson Sent: Tuesday, April 19, 2005 11:06 PM To: Rotary motors in aircraft Subject: [FlyRotary] New Rotors! Got the new rotors today - first time I've ever seen a new rotor = - the are bright metallic {:>).=20 The depth of the apex seal slot on the new rotors ranged from = 9.65mm to 9.77 mm. Interestingly the width of the bottom of the apex = slot was 1.88mm but the top was narrower at 1.778mm. I noticed that the = lip of the apex seal slot had a tiny burr of metal along it as if they = were not using a sharp enough tool or else pushing it along too fast. = Or perhaps no one took the time to deburr the slot. Just in case any of you ever wonder whether you are looking at a = 9.7:1 rotor or some other rotor, there is a fairly easy way to tell. = Lay a straight edge across the depression in the rotor and measure from = its bottom to the center of the depression, it should measure right at 4 = mm. The 9.1 measure around 7mm for comparison. Just thought you might = want to know. Ed Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com ------=_NextPart_000_0033_01C54644.05CAE2B0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Ken,
Apart from the apex seals,
the side seals are different ( they are = tapered).
 
The Oil rings are the same size but may = be=20 different materials ( different part numbers) to withstand the side = exhaust=20 heat.
 
The corner seals are the same size but = different=20 materials ( harder) and chop up earlier model housings.
 
The springs may be = different=20 material?
 
But their all cheaper than the RX7=20 parts.
 
The Procedure is to recut the apex seal = slots and=20 use the older oil seals and springs.
 
George ( down under)
----- Original Message -----
From:=20 kenpowell@comcast.net
Sent: Wednesday, April 20, 2005 = 11:46=20 PM
Subject: [FlyRotary] Re: New=20 Rotors!

Ed,
What pieces are different for the RX8 rotors besides the apex=20 seals?

Ken Powell
Bryant, Arkansas
501-847-4721
 
--------------=20 Original message --------------
Yes, Indeed!  Started putting = the rotor=20 pieces together last night, the used side seals all give very good=20 tolerances.  I had to change some from the slots they were = in on=20 the old rotors, but juggling them around I could match the seal = length to=20 the slot quite well.  Glad I could as you have to trim the = stock side=20 seals for your fit - a tedious task at best.
 
I was a bit dismayed to find that = the tolerance=20 on my oil control rings wear were at or outside of specs after only = 150=20 hours.  Again, this could be accelerated wear due to ingesting=20  the dust around my hangar.  So had to order some = more. =20  A filter will be next on the list.
 
Interestingly in the basic kit you = get through=20 Tracy, they provide a length of rubber channel tube that you = cut your=20 corner seal rubber plugs out of.
 
----- Original Message ----- =
From:=20 Steve=20 Brooks
To: Rotary motors in = aircraft=20
Sent: Wednesday, April 20, = 2005 7:48=20 AM
Subject: [FlyRotary] Re: = New=20 Rotors!

Ed,
Sounds like the fun is ready to = begin.
 
Steve Brooks
 
-----Original Message-----
From: Rotary = motors in=20 aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of = Ed=20 Anderson
Sent: Tuesday, April 19, 2005 11:06 = PM
To:=20 Rotary motors in aircraft
Subject: [FlyRotary] New=20 Rotors!

Got the new rotors today - = first time I've=20 ever seen a new rotor - the are bright metallic=20 {:>). 
 
The depth of the apex seal slot = on the new=20 rotors ranged from 9.65mm to 9.77 mm.  Interestingly the = width of=20 the bottom of the apex slot was 1.88mm but the top was narrower = at=20 1.778mm.  I noticed that the lip of the apex seal slot had = a tiny=20 burr of metal along it as if they were not using a sharp enough = tool or=20 else pushing it along too fast.  Or perhaps no one took the = time to=20 deburr the slot.
 
Just in case any of you ever wonder whether you are looking = at a=20 9.7:1 rotor or some other rotor, there is a fairly easy way to=20 tell.  Lay a straight edge across the depression in the = rotor and=20 measure from its bottom to the center of the depression, it = should=20 measure right at 4 mm.  The 9.1 measure around 7mm for=20 comparison.  Just thought you might want to know.
 
Ed
 
Rv-6A N494BW Rotary=20 Powered
Matthews, NC
eanderson@carolina.rr.com
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