X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 2 [X] Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 23 Apr 2007 17:35:25 -0400 Message-ID: X-Original-Return-Path: Received: from elasmtp-mealy.atl.sa.earthlink.net ([209.86.89.69] verified) by logan.com (CommuniGate Pro SMTP 5.1.8) with ESMTP id 2000589 for lml@lancaironline.net; Mon, 23 Apr 2007 16:01:18 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.69; envelope-from=leighton@teleport.com DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=teleport.com; b=q2c9gOS0DQrwUnwKWGwRMTc0RUgzSUwxfPtQOpYMdfgR9D30lB0N8bMKYj9eMhcb; h=Received:Message-ID:From:To:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE:X-ELNK-Trace:X-Originating-IP; Received: from [4.242.171.89] (helo=user) by elasmtp-mealy.atl.sa.earthlink.net with asmtp (Exim 4.34) id 1Hg4ho-0000bW-9j for lml@lancaironline.net; Mon, 23 Apr 2007 16:00:13 -0400 X-Original-Message-ID: <002b01c785e2$00dc01f0$59abf204@user> From: "Leighton" X-Original-To: "Lancair Mail list" Subject: Elevator trim tab problems X-Original-Date: Mon, 23 Apr 2007 13:00:10 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0028_01C785A7.53342F30" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3028 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 X-ELNK-Trace: ea0fe3d44b30ba0fc355332e9c4b49d598c48853aa0a5d8992e02c8e46b2eca6162c2603f84074d5350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 4.242.171.89 This is a multi-part message in MIME format. ------=_NextPart_000_0028_01C785A7.53342F30 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable While the 10A servo can be made to work on the Legacy (and MarkII) = elevator trim tab it will require creating extra clearance between the = plastic clevis and the aluminum horn. Also, extra travel on the tab = itself will need to be established. The slick solution is to use the = -7A servo. Ray Allen Company converted a -10 into a -7 for me one time. = The two clevises need to have about .1" removed from their small ends = and assembled to a hole to hole length of about 1.25". With the -7 = servo, if the linkage is set to provide .6" up travel on the trailing = edge of the tab, relative to the elevator trailing edge, and down travel = of .9" everything should clear although enlarging the bottom of the = clevis slot will give a bit more safety margin. This has proven to be = enough trim travel for a properly balanced Legacy. Actually, very = little nose down trim is needed. If the -10 servo is used the arm on = the tab will have to be radiused on the front and the clevis notch = deepened, but it can be done. Please don't forget that up-tab is nose = down and vice versa. Bias the tab for more nose up than down. By the = way, the -7 has more than enough travel for the rudder trim, if you use = it. Leighton Mangels ------=_NextPart_000_0028_01C785A7.53342F30 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

While the 10A servo can be made to work on the = Legacy (and=20 MarkII) elevator trim tab it will require creating extra clearance = between the=20 plastic clevis and the aluminum horn. Also, extra travel on the = tab itself=20 will need to be established. The slick solution is to use the -7A=20 servo. Ray Allen Company converted a -10 into a -7 for me one = time. =20 The two clevises need to have about .1" removed from their small ends = and=20 assembled to a hole to hole length of about 1.25". With the -7 = servo, if=20 the linkage is set to provide .6" up travel on the trailing edge of the = tab,=20 relative to the elevator trailing edge, and down travel of .9" = everything should=20 clear although enlarging the bottom of the clevis slot will give a bit = more=20 safety margin. This has proven to be enough trim travel for a = properly=20 balanced Legacy. Actually, very little nose down trim is = needed. If=20 the -10 servo is used the arm on the tab will have to be radiused on the = front=20 and the clevis notch deepened, but it can be done. Please don't = forget=20 that up-tab is nose down and vice versa. Bias the tab for more = nose up=20 than down. By the way, the -7 has more than enough travel for the = rudder=20 trim, if you use it.

Leighton Mangels

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