X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from relais.videotron.ca ([24.201.245.36] verified) by logan.com (CommuniGate Pro SMTP 5.2.5) with ESMTP id 3042013 for flyrotary@lancaironline.net; Fri, 25 Jul 2008 12:19:39 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.201.245.36; envelope-from=geryvon@videotron.ca MIME-version: 1.0 Content-type: multipart/alternative; boundary="Boundary_(ID_2Pa1QjUtCb52kAaEyKa3Jw)" Received: from yvon ([66.130.76.30]) by VL-MH-MR001.ip.videotron.ca (Sun Java(tm) System Messaging Server 6.3-4.01 (built Aug 3 2007; 32bit)) with SMTP id <0K4K00M59LBJIZE0@VL-MH-MR001.ip.videotron.ca> for flyrotary@lancaironline.net; Fri, 25 Jul 2008 12:18:56 -0400 (EDT) Message-id: From: Yvon Cournoyer To: Rotary motors in aircraft References: Subject: Re: [FlyRotary] Re: 13B--- N/A vs. Turbo engine buildup? Date: Fri, 25 Jul 2008 12:18:45 -0400 X-Priority: 3 X-MSMail-priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.5512 This is a multi-part message in MIME format. --Boundary_(ID_2Pa1QjUtCb52kAaEyKa3Jw) Content-type: text/plain; charset=Windows-1252 Content-transfer-encoding: quoted-printable ''it is a dog'' What does that expression mean? YvonC ----- Original Message -----=20 From: Mark Steitle=20 To: Rotary motors in aircraft=20 Sent: Thursday, July 24, 2008 8:18 PM Subject: [FlyRotary] Re: 13B--- N/A vs. Turbo engine buildup? Paul,=20 I am running a N/A 20B-REW (twin turbo) rotary in my Lancair. It has = the stock 9.0 rotors. I've read over and over that at the rpm range we = operate, there is very little difference in power between low and high = compression rotors. I doubt that anyone that's ridden in my Lancair = would say that it is a "dog". However, I did do a little porting, so = probably helps to offset the low compression rotors. You can use high = compression rotors, but you'll need to have it rebalanced. I used the = stock turbo rotors because I may want to turbo-charge later on and = didn't want to tear the engine down again to change rotors. =20 Mark=20 On Thu, Jul 24, 2008 at 5:20 PM, Paul Vermillion = wrote: Subject: 13B--- N/A vs. Turbo engine buildup? To Everyone=97 We have both a 13b NA (unknown vintage=9780's?) and = a '91 Turbo 13B engine and are just beginning their teardowns, both = allegedly running but internal condition unknown. Would there be any = problem running the Turbo engine (BUT NOT with the turbo setup-- AS IF = it were a NA engine)? Is it a "stronger" engine than the NA? Would it = need a different Timing setup? Would there be a compression problem = running it sans turbo? (Hearsay has it that it would be a "dog".) If = some of the individual parts spec out to be better in one engine but not = in the other, would there be any problem/advantage in "mixing & = matching" the various parts in the newly built up engine, i.e., = rotaries, side plates, eccentric shaft, etc? We would appreciate your = inputs. Thanks! Paul & Don Vermillion --Boundary_(ID_2Pa1QjUtCb52kAaEyKa3Jw) Content-type: text/html; charset=Windows-1252 Content-transfer-encoding: quoted-printable
''it is a dog'' What does that = expression=20 mean? YvonC
----- Original Message -----
From:=20 Mark = Steitle=20
Sent: Thursday, July 24, 2008 = 8:18=20 PM
Subject: [FlyRotary] Re: 13B--- = N/A vs.=20 Turbo engine buildup?

Paul,

I am running a N/A 20B-REW (twin turbo) = rotary in=20 my Lancair.  It has the stock 9.0 rotors.  I've read over = and over=20 that at the rpm range we operate, there is very little difference in = power=20 between low and high compression rotors.  I doubt that anyone = that's=20 ridden in my Lancair would say that it is a "dog".  However, I = did do a=20 little porting, so probably helps to offset the low compression = rotors. =20 You can use high compression rotors, but you'll need to have it=20 rebalanced.  I used the stock turbo rotors because I may want to=20 turbo-charge later on and didn't want to tear the engine down again to = change=20 rotors. 

Mark

On Thu, Jul 24, 2008 at 5:20 PM, Paul = Vermillion <paulo264@cox.net> wrote:

 

 


Subject: 13B--- N/A vs. Turbo = engine=20 buildup?

 

To Everyone=97

=

           &nbs= p;   =20 We have both a 13b  NA (unknown vintage=9780's?) and a = '91 Turbo=20 13B engine and are just beginning their teardowns, both allegedly = running=20 but internal condition unknown.   Would there be any = problem=20 running the Turbo engine (BUT NOT with the turbo setup-- = AS IF=20 it were a NA engine)?  Is it a "stronger" engine than the NA?=20  Would it need a different Timing setup?  Would there be a = compression problem running it sans turbo? (Hearsay has it that it = would be=20 a "dog".)  If some of the individual parts spec out to be = better in one=20 engine but not in the other, would there be any problem/advantage in = "mixing=20 & matching" the various parts in the newly built up engine, = i.e.,=20 rotaries, side plates, eccentric shaft, etc?   We would = appreciate=20 your inputs.    Thanks!

 

Paul & Don=20 Vermillion


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