X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from eastrmmtao102.cox.net ([68.230.240.8] verified) by logan.com (CommuniGate Pro SMTP 5.2.5) with ESMTP id 3042025 for flyrotary@lancaironline.net; Fri, 25 Jul 2008 12:28:54 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.240.8; envelope-from=paulo264@cox.net Received: from eastrmimpo03.cox.net ([68.1.16.126]) by eastrmmtao102.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20080725162816.NNNR22786.eastrmmtao102.cox.net@eastrmimpo03.cox.net> for ; Fri, 25 Jul 2008 12:28:16 -0400 Received: from paul400gb ([68.109.12.179]) by eastrmimpo03.cox.net with bizsmtp id uGUF1Z0053rn6h802GUFyn; Fri, 25 Jul 2008 12:28:15 -0400 From: "Paul Vermillion" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Re: 13B--- N/A vs. Turbo engine buildup? Date: Fri, 25 Jul 2008 11:28:16 -0500 Message-ID: <006101c8ee73$714e8480$53eb8d80$@net> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0062_01C8EE49.88787C80" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: Acjucj714ZZKMT9ESoyQMIdk8xUKXwAAMVUQ Content-Language: en-us This is a multipart message in MIME format. ------=_NextPart_000_0062_01C8EE49.88787C80 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit YvonC----It is an expression which refers to a piece of equipment actually operating very poorly compared to what is normally expected of it. From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Yvon Cournoyer Sent: Friday, July 25, 2008 11:19 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: 13B--- N/A vs. Turbo engine buildup? ''it is a dog'' What does that expression mean? YvonC ----- Original Message ----- From: Mark Steitle To: Rotary motors in aircraft Sent: Thursday, July 24, 2008 8:18 PM Subject: [FlyRotary] Re: 13B--- N/A vs. Turbo engine buildup? Paul, 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. Mark On Thu, Jul 24, 2008 at 5:20 PM, Paul Vermillion wrote: Subject: 13B--- N/A vs. Turbo engine buildup? To Everyone- We have both a 13b NA (unknown vintage-80'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 ------=_NextPart_000_0062_01C8EE49.88787C80 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

YvonC----It is an expression which refers to a piece of equipment actually operating very poorly compared to what is = normally expected of it.

From:= Rotary = motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Yvon Cournoyer
Sent: Friday, July 25, 2008 11:19 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: 13B--- N/A vs. Turbo engine = buildup?

''it is a dog'' What does that expression mean? = YvonC

----- Original Message -----

From: Mark Steitle

To: Rotary motors in aircraft

Sent:<= /b> Thursday, = July 24, 2008 8:18 PM

Subject: [FlyRotary] = Re: 13B--- N/A vs. Turbo engine buildup?

Paul,

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.

Mark

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

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

To Everyone—

&nbs= p; We have both a 13b NA (unknown vintage—80'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

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