X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 02 Jan 2014 12:37:46 -0500 Message-ID: X-Original-Return-Path: Received: from smtp0v2.neonova.net ([137.118.16.31] verified) by logan.com (CommuniGate Pro SMTP 6.0.8) with ESMTP id 6665774 for lml@lancaironline.net; Thu, 02 Jan 2014 11:14:16 -0500 Received-SPF: pass receiver=logan.com; client-ip=137.118.16.31; envelope-from=pinetownd@volcano.net Received: from localhost (localhost [127.0.0.1]) by smtp0v2.neonova.net (Postfix) with ESMTP id 4654FC009CA for ; Thu, 2 Jan 2014 11:13:40 -0500 (EST) X-Virus-Scanned: amavisd-new at av-mx.com Received: from smtp0v2.neonova.net ([127.0.0.1]) by localhost (smtp0v2.neonova.net [127.0.0.1]) (amavisd-new, port 10124) with ESMTP id MOXh2551UEHV for ; Thu, 2 Jan 2014 11:13:36 -0500 (EST) Received: from DennisPC (65-174-0-12.dsl.volcano.net [65.174.0.12]) (Authenticated sender: pinetownd@volcano.net) by smtp0v2.neonova.net (Postfix) with ESMTPA for ; Thu, 2 Jan 2014 11:13:36 -0500 (EST) X-Original-Message-ID: From: "Dennis Johnson" X-Original-To: "Lancair Mailing List" References: In-Reply-To: Subject: Re: [LML] Legacy Takeoff Performance at High Elevation Airports? X-Original-Date: Thu, 2 Jan 2014 08:13:42 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_41BE_01CF0792.8CAD9700" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6002.18197 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 This is a multi-part message in MIME format. ------=_NextPart_000_41BE_01CF0792.8CAD9700 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Valin, I fly my naturally aspirated IO-550 Legacy out of an airport with a = field elevation of 4,400'. I've seen density altitude as high as 8,000' = in the summer. I've never measured it precisely, but my sense is that = my takeoff roll can be up to about 3,000' long if I'm heavy and the = density altitude is high. I don't think I've ever needed more than = 4,000' of runway for landing. I wouldn't worry about operating out of = your 9,000' long runway with its field elevation of 5,700'. =20 My rules of thumb are mimimum 3,000' runway at sea level and at higher = altitudes, I like to have 1,000' more runway than field elevation. I = think runway length is controlled by landing distance, not takeoff roll. = Of course, runway slope, winds, density altitude, airplane weight, etc. = make each situation different. Best, Dennis Legacy, 675 hours=20 ------=_NextPart_000_41BE_01CF0792.8CAD9700 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Valin,

I fly my naturally aspirated IO-550 Legacy out of an airport with a = field=20 elevation of 4,400'. I've seen density altitude as high as 8,000' = in the=20 summer. I've never measured it precisely, but my sense is that my = takeoff=20 roll can be up to about 3,000' long if I'm heavy and the density = altitude is=20 high. I don't think I've ever needed more than 4,000' of runway = for=20 landing. I wouldn't worry about operating out of your 9,000' = long=20 runway with its field elevation of 5,700'.

My rules of thumb are mimimum 3,000' runway at sea level and at = higher=20 altitudes, I like to have 1,000' more runway than field elevation. = I think=20 runway length is controlled by landing distance, not takeoff roll. = Of=20 course, runway slope, winds, density altitude, airplane weight, = etc. make=20 each situation different.

Best,

Dennis

Legacy, 675 hours

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