X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 21 Dec 2012 07:47:44 -0500 Message-ID: X-Original-Return-Path: Received: from nm28.access.bullet.mail.mud.yahoo.com ([66.94.237.93] verified) by logan.com (CommuniGate Pro SMTP 6.0) with ESMTPS id 5961622 for lml@lancaironline.net; Thu, 20 Dec 2012 20:37:23 -0500 Received-SPF: neutral receiver=logan.com; client-ip=66.94.237.93; envelope-from=browncc1@verizon.net Received: from [66.94.237.127] by nm28.access.bullet.mail.mud.yahoo.com with NNFMP; 21 Dec 2012 01:36:49 -0000 Received: from [98.138.85.46] by tm2.access.bullet.mail.mud.yahoo.com with NNFMP; 21 Dec 2012 01:36:49 -0000 Received: from [127.0.0.1] by smtp103.vzn.mail.ne1.yahoo.com with NNFMP; 21 Dec 2012 01:36:48 -0000 X-Yahoo-Newman-Id: 980442.52011.bm@smtp103.vzn.mail.ne1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: 1.HsLYcVM1lRGc4zxam32MsdM2A6SZWbjtn7TamTcwPYX3z ZA8g97QwHOXLXiEC7YQdP5Q5lBqN8Rt7jiIQQFedwOX.Wj1_EhYeu_w7zWLe 1N37dacE2o09Qhxx1MBer_rwWJOj7Xx1ztEjuT3ry49GHvlO6g3ZlcNEP78J hbi4yXWvOPE6Oorp8SiOhx9GrBKwHv0zRx8bxD4gcChLqxMT7daNm.MshrjR BbW1b8ZDl4M0g4s0XmaQCwFVv9k7dwzsPPQweGd2LcE0UujHmYSZFFjZ_70w zUtNBde2ZW5WZBdqC29vJId_a11ZNDgP4vv0qwfo8FlPs_8MR9gYMNWq5YSa 8r02MIuFV8QaGoDMLf.5ZEPxO58whlNZ8yrAF9VFF0LTCqbO1AECRJBj1mLI H6xMcPCmrS_F9W0tGP8evvHCEnHs0N6qyHAsRRlDHi6dFu6mrEia0SCg4_Ya An09jGgclnwCXYzeJdhO08d8XpR4- X-Yahoo-SMTP: F49l9g6swBC0R9n8vJIbm7Tf3P8Xlmia8rHIwTlO__Ml Received: from new-host-4.home (browncc1@72.64.105.53 with plain) by smtp103.vzn.mail.ne1.yahoo.com with SMTP; 21 Dec 2012 01:36:48 +0000 UTC From: Charles Brown Mime-Version: 1.0 (Apple Message framework v1085) Content-Type: multipart/alternative; boundary=Apple-Mail-2--210514940 Subject: Re: [LML] Re: Legacy aileron trim tab X-Original-Date: Thu, 20 Dec 2012 19:36:46 -0600 In-Reply-To: X-Original-To: "Lancair Mailing List" References: X-Original-Message-Id: <567BCABC-8635-477D-8CFD-DF04CA2D35D3@verizon.net> X-Mailer: Apple Mail (2.1085) --Apple-Mail-2--210514940 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Bill, The solution that Gary advocates (thickening the trim tab) is consistent = with the idea of getting to the edges of the boundary layer. In fact, = if you look at the Cheetah/Tiger aircraft, you will find that while the = flaps are sharp-edged, the ailerons are fairly thick almost to the = trailing edge, where they close out with a 45-degree taper. The = ailerons are kept thick so that they push against the boundary layer = edges on top and bottom, and there's no deadband that would accompany a = thin aileron traversing a thick boundary layer when the pilot moves the = control wheel. Charley On Dec 20, 2012, at 2:38 PM, Bill Bradburry wrote: Gary, Excellent idea! I can try different sizes and shapes and not even = change the original tab until I am satisfied! =20 I love this list! =20 Bill B =20 From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of = Gary Casey Sent: Thursday, December 20, 2012 8:22 AM To: lml@lancaironline.net Subject: [LML] Re: Legacy aileron trim tab =20 I've forgotten whether or not the Legacy has the thick aileron trailing = edge as in other Lancairs. In my ES I drilled a bunch of holes in the = standard tab, which is just half of a piano hinge. Then I cut a piece = of prepreg about 1 inch larger, cut a slot in the honeycomb to fit and = then epoxied it over the hinge. It is now about the same thickness as = the trailing edge, making it an extension of the aileron. Works great. Gary Casey =20= --Apple-Mail-2--210514940 Content-Transfer-Encoding: 7bit Content-Type: text/html; charset=us-ascii

Bill,

The solution that Gary advocates (thickening the trim tab) is consistent with the idea of getting to the edges of the boundary layer. In fact, if you look at the Cheetah/Tiger aircraft, you will find that while the flaps are sharp-edged, the ailerons are fairly thick almost to the trailing edge, where they close out with a 45-degree taper. The ailerons are kept thick so that they push against the boundary layer edges on top and bottom, and there's no deadband that would accompany a thin aileron traversing a thick boundary layer when the pilot moves the control wheel.

Charley

On Dec 20, 2012, at 2:38 PM, Bill Bradburry wrote:

Gary,

Excellent idea! I can try different sizes and shapes and not even change the original tab until I am satisfied!

I love this list!

Bill B

From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Gary Casey
Sent: Thursday, December 20, 2012 8:22 AM
To: lml@lancaironline.net
Subject: [LML] Re: Legacy aileron trim tab

I've forgotten whether or not the Legacy has the thick aileron trailing edge as in other Lancairs. In my ES I drilled a bunch of holes in the standard tab, which is just half of a piano hinge. Then I cut a piece of prepreg about 1 inch larger, cut a slot in the honeycomb to fit and then epoxied it over the hinge. It is now about the same thickness as the trailing edge, making it an extension of the aileron. Works great.

Gary Casey

--Apple-Mail-2--210514940--