X-Virus-Scanned: clean according to Sophos on Logan.com From: "Neil Unger" Received: from nskntmtas03p.mx.bigpond.com ([61.9.168.143] verified) by logan.com (CommuniGate Pro SMTP 6.1c4) with ESMTP id 7472613 for flyrotary@lancaironline.net; Fri, 06 Feb 2015 23:44:02 -0500 Received-SPF: pass receiver=logan.com; client-ip=61.9.168.143; envelope-from=neil.unger@bigpond.com Received: from nskntcmgw06p ([61.9.169.166]) by nskntmtas03p.mx.bigpond.com with ESMTP id <20150207044328.WBKL7575.nskntmtas03p.mx.bigpond.com@nskntcmgw06p> for ; Sat, 7 Feb 2015 04:43:28 +0000 Received: from UserPC ([101.175.192.162]) by nskntcmgw06p with BigPond Outbound id pGjQ1p0073WhNSl01GjQnK; Sat, 07 Feb 2015 04:43:28 +0000 X-Authority-Analysis: v=2.0 cv=RsdH3VaK c=1 sm=1 a=kjXN7Uo4HdxY6B9dZ9nzRQ==:17 a=1IlZJK9HAAAA:8 a=Ia-xEzejAAAA:8 a=KXPEMHwyJSMxIWpBWoAA:9 a=QEXdDO2ut3YA:10 a=xYcYTM_YAsR3tRjBWXIA:9 a=_W_S_7VecoQA:10 a=tAclRuqfZIuQ0Pph:21 a=kjXN7Uo4HdxY6B9dZ9nzRQ==:117 Message-ID: <5D2819E6083E49619206043669A820EA@UserPC> To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: 20B Engines Date: Sat, 7 Feb 2015 15:43:10 +1100 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002B_01D042EC.C6AA77C0" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 15.4.3555.308 X-MimeOLE: Produced By Microsoft MimeOLE V15.4.3555.308 This is a multi-part message in MIME format. ------=_NextPart_000_002B_01D042EC.C6AA77C0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Re ruined rotor housings, A bloke in OZ is way down the path of making = sleeves to fit inside ruined rotor housings. He cuts out the inside = level with the inside edge of the inner side O ring groove, then presses = in a sleeve that makes the housing back to new specks, and give you a = new inner O ring lip as well. Believe he is at the stage of testing the = first ones now. Something to watch, and in the meantime do not throw = any damaged rotor housings away. Neil. From: Kelly Troyer=20 Sent: Saturday, February 07, 2015 9:17 AM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: 20B Engines Thanks Mark........That is the info I was looking for............I = happen to have a 13B Cosmo that has the later housings=20 and I had only read about the reinforced housings......... Kelly On Fri, Feb 6, 2015 at 6:49 AM, Mark Steitle = wrote: Kelly,=20 I wouldn't hesitate to use an early 20b. The early 20b housings are = plenty robust enough for a/c use. The beefier irons could be an issue = if you're building a turbo race engine due to the higher loads imposed = during up shifting and down shifting. We don't experience any of those = loads. =20 I'm pretty certain that my 20b is an early model and I have not = experienced any issues with irons cracking around the dowels. The = weakest area is along the inner walls of the o-ring grooves nearest the = water jackets. If your o-rings aren't to factory specs, you run the risk = of cracking an o-ring wall which ruins the housing. Been there, done = that. If you treat the engine with the same care you would a certified = a/c engine, then you won't have any trouble with longevity.=20 Mark On Fri, Feb 6, 2015 at 12:00 AM, Kelly Troyer = wrote: Mark Steitle or other 20B Drivers,=20 I am looking at a 20B that looks to be an early one before they = added additional metal in the dowel/oil passage area of the iron housings because of = some that I have read developed cracks in this area in service in the autos I = presume....... Can you tell me if this a potential problem for the 20B in our = aircraft use ?.......Also can you tell me if your 20B has the later reinforced housings = ?......... =20 --=20 Kelly Troyer ------=_NextPart_000_002B_01D042EC.C6AA77C0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Re ruined rotor housings,  A bloke in OZ is way down the path = of=20 making sleeves to fit inside ruined rotor housings. He cuts out the = inside level=20 with the inside edge of the inner side O ring groove, then presses in a = sleeve=20 that makes the housing back to new specks, and give you a new inner O = ring lip=20 as well.  Believe he is at the stage of testing the first ones = now. =20 Something to watch, and in the meantime do not throw any damaged rotor = housings=20 away.  Neil.
 
Sent: Saturday, February 07, 2015 9:17 AM
Subject: [FlyRotary] Re: 20B Engines
 
Thanks Mark........That is the info I was looking = for............I=20 happen to have a 13B Cosmo that has the later housings=20
and I had only read about the reinforced housings.........
 
Kelly
 
On Fri, Feb 6, 2015 at 6:49 AM, Mark Steitle = <flyrotary@lancaironline.net> wrote:
Kelly,

I wouldn't hesitate to use an early = 20b.  The=20 early 20b housings are plenty robust enough for a/c use.  The = beefier=20 irons could be an issue if you're building a turbo race engine due to = the=20 higher loads imposed during up shifting and down shifting.  We = don't=20 experience any of those loads. 

I'm pretty certain = that my=20 20b is an early model and I have not experienced any issues with irons = cracking around the dowels.  The weakest area is along the inner = walls of=20 the o-ring grooves nearest the water jackets. If your o-rings aren't = to=20 factory specs, you run the risk of cracking an o-ring wall which ruins = the=20 housing.  Been there, done that.  If you treat the engine = with the=20 same care you would a certified a/c engine, then you won't have any = trouble=20 with longevity.

Mark
 
On Fri, Feb 6, 2015 at 12:00 AM, Kelly Troyer = <flyrotary@lancaironline.net> wrote:
Mark Steitle or other 20B Drivers,=20
 
     I am looking at a 20B that looks to be = an=20 early one before they added additional
metal in the dowel/oil passage area of the iron housings = because of=20 some that I have
read developed cracks in this area in service in the autos I=20 presume.......
 
     Can you tell me if this a potential = problem=20 for the 20B in our aircraft use ?.......Also
can you tell me if your 20B has the later reinforced housings=20 ?......... 
 
--
Kelly = Troyer

 


 
 
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