X-Virus-Scanned: clean according to Sophos on Logan.com From: "James R. Osborn" Received: from mail-pd0-f173.google.com ([209.85.192.173] verified) by logan.com (CommuniGate Pro SMTP 6.1c4) with ESMTPS id 7479791 for flyrotary@lancaironline.net; Tue, 10 Feb 2015 12:28:37 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.192.173; envelope-from=rxcited@gmail.com Received: by pdjz10 with SMTP id z10so1756239pdj.0 for ; Tue, 10 Feb 2015 09:28:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:content-type:message-id:mime-version:subject:date:references :to:in-reply-to; bh=foQxUlZaP1iD7RSE8oD4AOb5nOyMstGvqe3Pdg59iAs=; b=Q0jo1xMVKAuzCMdHY8AE/cbAT4ptwWYWcGjamlPxoVjivGVi+rpqMWy3QYwlISmZVQ c+1I7ds2XwWAft64j8+9pUhx9Br5RDizsar1wtpfGmQfl5WtvQ2JEqjFxVD6Pg61MOzq KeAAZ/GlI790xB5kLAO1mtknN6y0kc3WcG8FUV6oqoyZTVymPaK8mhJ6JKJMifRIYuF/ 1pR1lbGzCTC1VhQ1nSgiemGierN3ROcW9tHixPCxtIiAWejJ7qLy2VXjFJqiR4SjHnqE GQm+qx2n9EEzLY0j8EBy4EWWiam8Uy43zXSYeMsRnLoSZUJWtJLJM7OgvadGm6i5CTN2 Txrw== X-Received: by 10.68.239.69 with SMTP id vq5mr39273458pbc.96.1423589283613; Tue, 10 Feb 2015 09:28:03 -0800 (PST) Return-Path: Received: from ?IPv6:2001:400:613:18::d6b? ([2001:400:613:18::d6b]) by mx.google.com with ESMTPSA id l2sm155757pbq.50.2015.02.10.09.28.02 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 10 Feb 2015 09:28:02 -0800 (PST) Content-Type: multipart/alternative; boundary="Apple-Mail=_E3C200B5-F1F7-4751-AC6E-FD731D6B76CA" Message-Id: Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2070.6\)) Subject: Re: [FlyRotary] 20B Engines Date: Tue, 10 Feb 2015 09:28:01 -0800 References: To: Rotary motors in aircraft In-Reply-To: X-Mailer: Apple Mail (2.2070.6) --Apple-Mail=_E3C200B5-F1F7-4751-AC6E-FD731D6B76CA Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 More importantly to me, how do you ensure you are getting a newer one = when you buy an engine? I have seen them for sale from importers in the = $10k+ price range. Is there a particular year of Eunos Cosmo engine to = look for? > On Feb 10, 2015, at 8:15 AM, Bill Bradburry = wrote: >=20 > Marc. > What are the numbers that indicate a later version? > Bill=20 > =20 > From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net = ]=20 > Sent: Tuesday, February 10, 2015 9:56 AM > To: Rotary motors in aircraft > Subject: [FlyRotary] Re: 20B Engines > =20 > There are 3 series of 20B engines IIRC. The center housing and the = crank on some of the earlier versions was reported to be a weak = link=E2=80=A6=E2=80=A6..later versions had mods to some internal parts. = I have a later version of the 20B. You can tell from the rotor housing = engine numbers (where the 20B is in black surround). > Marc > =20 > From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]=20= > Sent: Friday, February 06, 2015 4:17 PM > To: Rotary motors in aircraft > Subject: [FlyRotary] Re: 20B Engines > =20 > Thanks Mark........That is the info I was looking for............I = happen to have a 13B Cosmo that has the later housings > and I had only read about the reinforced housings......... > =20 > Kelly > =20 > On Fri, Feb 6, 2015 at 6:49 AM, Mark Steitle = > = wrote: > Kelly,=20 >=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 >=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 >=20 > Mark > =20 > 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....... > =20 > 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 > --=20 > Kelly Troyer >=20 --Apple-Mail=_E3C200B5-F1F7-4751-AC6E-FD731D6B76CA Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8
More importantly to me, how do you ensure you = are getting a newer one when you buy an engine?  I have seen them = for sale from importers in the $10k+ price range.  Is there a = particular year of Eunos Cosmo engine to look for?

On Feb 10, 2015, at 8:15 AM, Bill Bradburry = <flyrotary@lancaironline.net> wrote:

Marc.
What are the numbers that indicate a later = version?
Bill 
 
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] 
Sent: Tuesday, February 10, 2015 = 9:56 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: 20B = Engines
 
There are 3 series of 20B engines IIRC. = The center housing and the crank on some of the earlier versions was = reported to be a weak link=E2=80=A6=E2=80=A6..later versions had mods to = some internal parts. I have a later version of the 20B. You can tell = from the rotor housing engine numbers (where the 20B is in black = surround).
Marc
 
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] 
Sent: Friday, February 06, 2015 = 4:17 PM
To: Rotary motors in aircraft
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
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 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.  

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. 

Mark
 
On Fri, Feb 6, = 2015 at 12:00 AM, Kelly Troyer <flyrotary@lancaironline.net> wrote:
 Mark Steitle or other 20B = Drivers,
 
    =  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 ?.........  
 
-- 

Kelly = Troyer


= --Apple-Mail=_E3C200B5-F1F7-4751-AC6E-FD731D6B76CA--