X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 06 Oct 2008 22:29:09 -0400 Message-ID: X-Original-Return-Path: Received: from elasmtp-masked.atl.sa.earthlink.net ([209.86.89.68] verified) by logan.com (CommuniGate Pro SMTP 5.2.8) with ESMTP id 3201827 for lml@lancaironline.net; Mon, 06 Oct 2008 14:59:50 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.68; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=lZyjbq1q7SNvHeXdx7BILMlg+2F6ZisFeHdFKIlAk6pbWvtxppBRk/rHZYis6GC4; h=Received:Message-ID:From:To:References:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE:X-ELNK-Trace:X-Originating-IP; Received: from [216.57.118.63] (helo=ccaselt3) by elasmtp-masked.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1KmvIZ-0006KD-Sw for lml@lancaironline.net; Mon, 06 Oct 2008 14:59:16 -0400 X-Original-Message-ID: <015c01c927e5$a1058f60$6401a8c0@nvidia.com> From: "Colyn Case at earthlink" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Lancair 4 rudder extension X-Original-Date: Mon, 6 Oct 2008 14:59:14 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0159_01C927C4.19117EA0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da94095dd2248b0ad82799c7fc8a8edd9f587350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 216.57.118.63 This is a multi-part message in MIME format. ------=_NextPart_000_0159_01C927C4.19117EA0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable A question unanswered in my mind: Does a rudder extension and/or strake improve controllability in a stall = situation where the top of the tail is in disturbed air? As others have said, for normal operations you have plenty of rudder = authority with the piston. However, try doing a forward slip and see = how much you can get out of it.....not much. So there's not a lot of = "extra" there should you need it to overcome some assymetric unexpected = problem on your airframe. Colyn ------=_NextPart_000_0159_01C927C4.19117EA0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

A question=20 unanswered in my mind:

Does a=20 rudder extension and/or strake improve controllability in a stall = situation=20 where the top of the tail is in disturbed air?

As others=20 have said, for normal operations you have plenty of rudder authority = with the=20 piston. However, try doing a forward slip and see how much = you can=20 get out of it.....not much. So there's not a lot of "extra" = there=20 should you need it to overcome some assymetric unexpected problem on = your=20 airframe.

Colyn

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