Return-Path: Received: from mail18.syd.optusnet.com.au ([211.29.132.199] verified) by logan.com (CommuniGate Pro SMTP 4.3c3) with ESMTP-TLS id 880490 for flyrotary@lancaironline.net; Sat, 16 Apr 2005 18:10:33 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.132.199; envelope-from=lendich@optusnet.com.au Received: from george (d220-236-252-207.dsl.nsw.optusnet.com.au [220.236.252.207]) by mail18.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id j3GM9d9s018654 for ; Sun, 17 Apr 2005 08:09:43 +1000 Message-ID: <002501c542d1$8308d780$cffcecdc@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: New rotors, New housings Date: Sun, 17 Apr 2005 08:13:25 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0022_01C54325.53FF0500" 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_0022_01C54325.53FF0500 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Re: [FlyRotary] New rotors, New housingsEd, Ken's comments reminds me to say that I remeasured the width of the RX8 = rotor for a more accurate measurement and it appears after a number of = measurements that the RX8 rotor are only slightly wider, this being = .04mm in the gear area and only .02mm at the apex. This I believe won't be a problem at the RPM and power settings we = generally use. However it would represent a small problem in Ken's = application as he uses NOS at take-off and at that high power the = E-shaft does flex a little - this causes the rotors to skew slightly, = binding at the apex areas. Ken already has this problem with the RX7 = rotors and skims them to eliminate this problem. This is a remedy that = many in the racing game use as well. I don't believe there's a problem with the single rotor application and = won't be skimming the rotor.=20 Hope that helps! George ( down under) I would look into getting 85-85 GSELE rotors with the 3 mm seals, = you would also need the weights to match them, then machine out your = rotors for a spare engine, you may need one to bale you out in the = future, if you keep this up you may knock me off the seat as president = of the dead stick club. I am now running rotors machined out to 3 mm seals and at about 400 = hrs on them I can tell by checking through the exhaust port that the = seal grooves are getting V'ed out and getting sloppy so I am now putting = another engine together, on this one the rotors are in prime shape so I = think I will run Tracy's 2mm seals. Also I think that the groves may be hardened and by machining the = groves out makes them softer as they shouldn't have worn out in only 400 = hrs. Ken Well, the decision has been made. Thanks in part to the wife's = continued interest in my warm body on cold winter nights, the decision = has been made to purchase new rotors and rotor housings. $$ but = apparently I am worth it {:>) I looked into milling out the slots to 3mm and that would have been = the cheaper approach - but cheap approach is probably partly responsible = for me being in this situation - so going to try a different approach = this time. Besides leery of using a rotor which clearly has been = subjected to sufficient loads to scrape metal off its surface and peen = over apex slot. In the process of getting quotes. Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com ------=_NextPart_000_0022_01C54325.53FF0500 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Re: [FlyRotary] New rotors, New housings
Ed,
Ken's comments reminds me to say that I = remeasured=20 the width of the RX8 rotor for a more accurate measurement and it = appears after=20 a number of measurements that the RX8 rotor are only slightly wider, = this being=20 .04mm in the gear area and only .02mm at the apex.
 
This I believe won't be a problem at = the RPM and=20 power settings we generally use. However it would represent a small=20 problem in Ken's application as he uses NOS at take-off and at that = high=20 power the E-shaft does flex a little - this causes the rotors to skew = slightly,=20 binding at the apex areas. Ken already has this problem with the = RX7=20 rotors and skims them to eliminate this problem. This is a remedy = that many=20 in the racing game use as well.
 
 I don't believe there's a problem = with the=20 single rotor application and won't be skimming the = rotor. 
 
Hope that helps!
George ( down under)
  I would look into getting 85-85 GSELE rotors with the 3 mm = seals,=20 you would also need the weights to match them, then machine out your = rotors=20 for a spare engine, you may need one to bale you out in the future, if = you=20 keep this up you may knock me off the seat as president of the dead = stick=20 club.
  I am now running rotors machined out to 3 mm seals and at = about=20 400 hrs on them I can tell by checking through the exhaust port that = the seal=20 grooves are getting V'ed out and getting sloppy so I am now putting = another=20 engine together, on this one the rotors are in prime shape so I think = I will=20 run Tracy's 2mm seals.
 Also I think that the groves may be hardened and by = machining the=20 groves out makes them softer as they shouldn't have worn out in only = 400=20 hrs.
  Ken



Well, = the decision=20 has been made.  Thanks in part to the wife's continued interest = in my=20 warm body on  cold winter nights, the decision has been made to = purchase new rotors and rotor housings.  $$ but apparently I am = worth=20 it {:>)
 
I = looked into=20 milling out the slots to 3mm and that would have been the cheaper = approach -=20 but cheap approach is probably partly responsible for me being in = this=20 situation - so going to try a different approach this time.  = Besides=20 leery of using a rotor which clearly has been subjected to = sufficient loads=20 to scrape metal off its surface and peen over apex = slot.
 
In = the process of=20 getting quotes.
 
Ed
 
Ed=20 Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com

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