X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 26 Jan 2013 14:24:43 -0500 Message-ID: X-Original-Return-Path: Received: from blu0-omc3-s4.blu0.hotmail.com ([65.55.116.79] verified) by logan.com (CommuniGate Pro SMTP 6.0.1) with ESMTP id 6030614 for lml@lancaironline.net; Sat, 26 Jan 2013 09:37:19 -0500 Received-SPF: neutral receiver=logan.com; client-ip=65.55.116.79; envelope-from=frederickmoreno@bigpond.com Received: from BLU0-SMTP133 ([65.55.116.72]) by blu0-omc3-s4.blu0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4675); Sat, 26 Jan 2013 06:36:44 -0800 X-EIP: [TIp2guayOE676HwcIoA+pDuAqQNQGvER] X-Originating-Email: [frederickmoreno@bigpond.com] X-Original-Message-ID: X-Original-Return-Path: frederickmoreno@bigpond.com Received: from Razzle ([58.165.213.62]) by BLU0-SMTP133.phx.gbl over TLS secured channel with Microsoft SMTPSVC(6.0.3790.4675); Sat, 26 Jan 2013 06:36:43 -0800 MIME-Version: 1.0 X-Original-Date: Sat, 26 Jan 2013 22:36:34 +0800 Content-Type: multipart/alternative; charset="us-ascii"; boundary="------------Boundary-00=_YWL812S0000000000000" X-Mailer: IncrediMail (6395248) From: Frederick Moreno X-FID: FLAVOR00-NONE-0000-0000-000000000000 X-Priority: 3 X-Original-To: "Lancair Mail (lml@lancaironline.net)" Subject: Fw: RE: [LML] How Slick Is Your Airplane? (PDF attached) X-OriginalArrivalTime: 26 Jan 2013 14:36:43.0919 (UTC) FILETIME=[8FE0C9F0:01CDFBD2] --------------Boundary-00=_YWL812S0000000000000 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I have never been great at reading graphs, but the diagonal line is airsp= eed not HP corrected for prop efficiency. That is the vertical line. Or am = I wrong??=0D Bill =0D Right you are, Bill. I thought I caught that error, but I was wrong.=20 Error squared. (Blush)=0D As for prop efficiency, without data, one can only guess. As for unusual engine, if is a piston engine with a compression of around 8-9, use a specific fuel consumption of 0.39-0.40 pounds per HP hour leaned for cru= ise and use that. =0D Cheap tests yield cheap results. Better than none, but best we can do. =0D =0D Fred =0D =0D =0D =0D =0D =0D =0D =0D =0D =20 --------------Boundary-00=_YWL812S0000000000000 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

I have never been great at reading = graphs, but the diagonal line is airspeed, not HP corrected for prop effi= ciency. That is the vertical line. Or am I wrong??

Bill

Right you are,= Bill. I thought I caught that error, but I was wrong.&n= bsp; Error squared. (Blush)

As for prop efficie= ncy, without data, one can only guess. As for unusual engine, = if is a piston engine with a compression of around 8-9, use a specific fu= el consumption of 0.39-0.40 pounds per HP hour leaned for cruise, a= nd use that.

Cheap tests yi= eld cheap results. Better than none, but best we can do. =

= ;

Fred

--------------Boundary-00=_YWL812S0000000000000--