X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao103.cox.net ([68.230.241.43] verified) by logan.com (CommuniGate Pro SMTP 5.3.8) with ESMTP id 4387327 for flyrotary@lancaironline.net; Fri, 09 Jul 2010 20:45:05 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.43; envelope-from=alventures@cox.net Received: from fed1rmimpo03.cox.net ([70.169.32.75]) by fed1rmmtao103.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20100710004426.NMPJ20088.fed1rmmtao103.cox.net@fed1rmimpo03.cox.net> for ; Fri, 9 Jul 2010 20:44:26 -0400 Received: from BigAl ([72.199.216.236]) by fed1rmimpo03.cox.net with bizsmtp id g0kR1e00656cS2o040kR4W; Fri, 09 Jul 2010 20:44:25 -0400 X-VR-Score: 0.00 X-Authority-Analysis: v=1.1 cv=gYvuGldbRH+JoePyGgD9/BcGmh0KORxGuhB+sEhKosQ= c=1 sm=1 a=zNANCjgXmV0A:10 a=lN8H/RjlhkCyIsyuOn2r7w==:17 a=Ia-xEzejAAAA:8 a=7g1VtSJxAAAA:8 a=bfYTLlS4G_GWSS44eo4A:9 a=g9r_CV80-25xZ-yfGSMA:7 a=xoSrhafaD1-HVxyQKyWojPMT6QwA:4 a=CjuIK1q_8ugA:10 a=Qa1je4BO31QA:10 a=EzXvWhQp4_cA:10 a=rGqyYEe1YalEvu5jikkA:9 a=edOhlrrj9vQ-o1zamDoA:7 a=MMTWG-Q3ZJAVfuQW1QbpBgkF3RwA:4 a=lN8H/RjlhkCyIsyuOn2r7w==:117 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Dyno Date: Fri, 9 Jul 2010 17:45:49 -0800 Message-ID: <1E44EF335D17406EAB8BDBA2D6AA82B5@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001D_01CB1F8E.91B35FE0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6856 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5931 In-Reply-To: Thread-Index: AcsfoG8jNMnxIamjT5a+NaDNeMPFQwALzz0g This is a multi-part message in MIME format. ------=_NextPart_000_001D_01CB1F8E.91B35FE0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable This doesn't respond directly to the point, but one data point I have = from the dyno runs on my 20B is 5100 rpm; 100 - 125 lean of peak, not WOT - = about 23.5 MAP gave a BSFC of 0.49. It was putting out about 150 hp at that point. I was trying to guess cruise conditions, but didn't know what = they would be. =20 My typical altitude cruise is about 5500 rpm, 19 - 20" MAP, about 100 = lean of peak, about 125 hp and 10 GPH. That's right about the .49 BSFC; and that's kool cuz at 10,000 ft that gives me 165+ KTAS in a comfortable 4- place airplane. =20 Al =20 -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ernest Christley Sent: Friday, July 09, 2010 11:53 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Dyno =20 Ed Anderson wrote: > =20 > There is no question that if you vary the Air/fuel ratio by using the=20 > mixture control for a set air flow - you will vary power being = produced. > =20 =20 The question that really interests me, and the one that could only = really be answered on a dyno, is "Could you get the=20 174 Hp generated by this engine at 5500 RPM, but with a BSFC closer to = .40, by controlling power in this way?" =20 -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html ------=_NextPart_000_001D_01CB1F8E.91B35FE0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

This doesn’t respond directly to the point, = but one data point I have from the dyno runs on my 20B is 5100 rpm; 100 – = 125 lean of peak, not WOT – about 23.5 MAP gave a BSFC of 0.49. It was putting = out about 150 hp at that point. I was trying to guess cruise conditions, but = didn’t know what they would be.

My typical altitude cruise is about 5500 rpm, 19 - = 20” MAP, about 100 lean of = peak, about 125 hp and 10 GPH. That’s right about the .49 BSFC; and = that’s kool cuz at 10,000 ft that gives me 165+ KTAS in a comfortable 4- place = airplane.

Al

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On = Behalf Of Ernest Christley
Sent: Friday, July 09, 2010 11:53 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Dyno

Ed Anderson wrote:

>

> There is no question that if you vary the Air/fuel ratio by using the =

> mixture control for a set air flow - you will vary power being = produced.

>

The question that really interests me, and the one that could only really be answered on a dyno, is "Could you get the

174 Hp generated by this engine at 5500 RPM, but with a BSFC closer to .40, = by controlling power in this way?"

--

Homepage: http://www.flyrotary.com/

Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html<= /p>

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