X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [65.54.250.91] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1124763 for flyrotary@lancaironline.net; Tue, 23 May 2006 10:17:29 -0400 Received-SPF: pass receiver=logan.com; client-ip=65.54.250.91; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Tue, 23 May 2006 07:16:42 -0700 Message-ID: Received: from 4.171.147.128 by BAY115-DAV19.phx.gbl with DAV; Tue, 23 May 2006 14:16:37 +0000 X-Originating-IP: [4.171.147.128] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Fw: more facts about the Sport Aviation article Date: Tue, 23 May 2006 10:16:35 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0062_01C67E51.F85B46A0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.20.0026.0800 Seal-Send-Time: Tue, 23 May 2006 10:16:35 -0400 X-OriginalArrivalTime: 23 May 2006 14:16:42.0137 (UTC) FILETIME=[83A16890:01C67E73] This is a multi-part message in MIME format. ------=_NextPart_000_0062_01C67E51.F85B46A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageRusty, I read both articles and the facts presented were the same = but the prose was completely different. I had no problem with the fact = that Ken Scott of Van's AC wrote the article. As written, it was as = objective as possible with the exception of the false FADEC claims on = the Powersport system. BUT, That artificial rule on the prop RPM during = the cruise fuel burn test was absolutely absurd. To have any real = meaning, the engine should have been run where it operated most = efficiently which in this case was at much lower RPM. Also not mentioned in the article was the fact (based on Van's Aircraft = own tests) that the 3 blade MT props used on the Powersport rotaries are = significantly less efficient than the 2 blade blended airfoil Hartzel = props used on the Lyc powered planes. These factors clearly stacked the deck against the rotaries when it came = to fuel economy. They should have at least mentioned the improved = exhaust system that the Powersport engines now run. =20 Tracy=20 Ed wrote:=20 > 3) The author of the article, Ken Scott, is a Vans Aircraft > employee > and is therefore a sales agent for Lycoming. Hi Ed, So was the "Sport Aviation" article the same as the one in the RVator? = If so, then I guess I have read it. =20 Rusty ------=_NextPart_000_0062_01C67E51.F85B46A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
Rusty, I read both articles and the facts presented were the same = but=20 the prose was completely different.  I had no problem with the = fact=20 that Ken Scott of Van's AC wrote the article.  As written, it was = as=20 objective as possible with the exception of the false FADEC claims on = the=20 Powersport system.  BUT, That artificial rule on the prop RPM = during the=20 cruise fuel burn test was absolutely absurd.   To have any = real=20 meaning, the engine should have been run where it operated most = efficiently=20 which in this case was at much lower RPM.
 
Also not mentioned in the article was the fact (based on Van's=20 Aircraft own tests) that the 3 blade MT props used on the = Powersport=20 rotaries are significantly less efficient than the 2 blade blended = airfoil=20 Hartzel  props used on the Lyc powered planes.
 
These factors clearly stacked the deck against the rotaries when it = came to=20 fuel economy.  They should have at least mentioned the = improved=20 exhaust system that the Powersport engines now run. 
 
Tracy
Ed wrote:

> 3)  The author of  the article, Ken=20 Scott,  is a Vans Aircraft
> employee
> and is = therefore a=20 sales agent for Lycoming.

 
Hi=20 Ed,
 
So was = the "Sport=20 Aviation" article the same as the one in the RVator?  If so, then = I guess=20 I have read it. 
 
Rusty
 



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