X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 08 Jun 2011 08:25:10 -0400 Message-ID: X-Original-Return-Path: Received: from elasmtp-banded.atl.sa.earthlink.net ([209.86.89.70] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTP id 5013007 for lml@lancaironline.net; Tue, 07 Jun 2011 22:18:26 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.70; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=N7MfTB13TdwmoJTgYY2vAisFKvPSsUzkVb8Apa0Wx4birrQtJX39sFczsiLm1htV; h=Received:From:Mime-Version:Content-Type:Subject:Date:In-Reply-To:To:References:Message-Id:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [216.57.118.194] (helo=[192.168.1.100]) by elasmtp-banded.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1QU8L7-0000Aw-Hi for lml@lancaironline.net; Tue, 07 Jun 2011 22:17:50 -0400 From: Colyn Case Mime-Version: 1.0 (Apple Message framework v1082) Content-Type: multipart/alternative; boundary=Apple-Mail-434-627271562 Subject: Re: [LML] Winglets? And introducing myself as a very near future 4p owner. X-Original-Date: Tue, 7 Jun 2011 22:17:49 -0400 In-Reply-To: X-Original-To: "Lancair Mailing List" References: X-Original-Message-Id: <005F86D5-C2DE-46FE-BF58-1A2E94558B6C@earthlink.net> X-Mailer: Apple Mail (2.1082) X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da940c7b0b6126a39dd4352652c07f1840591350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 216.57.118.194 --Apple-Mail-434-627271562 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 there are two questions: stability and speed. if you go into the archives you will find comments about both. My favorite on the speed is in the series of drag reduction articles by = Fred Moreno: http://lancair.net/archives/Drag_Reduction_Part_1.pdf search the doc for "winglets" and find "side note on winglets" I don't know what the full argument for stability comes down to = aerodynamically. ....is it simply the added span? I can say that the roll input required with winglets is unpleasant at = high speeds. careful on the buy. the airframe could be perfect but still lots of = gremlins in the systems. Colyn On Jun 7, 2011, at 2:18 PM, RONALD STEVENS wrote: > Hello guys. >=20 > I like to introduce myself, I am 50, European/American, former Cirrus > SR22 (1100 hours) and Velocity TXL5 (250 hours, just sold this plane) > (total 1400 hours). >=20 > I am a future Lancair 4p owner (looking to buy one these weeks, so if > you know someone who wants to sell his let me know) and looked at a = few > Lancair 4p already. >=20 > Now about the winglets (my first question); > Some planes I looked at had their winglets, some not. All those that = did not had one told me it doesn't do anything, the ones they had did = told me it works great, > more stability etc, even the CAFE report is telling that it produces > more stability at higher altitude. >=20 > But=85even the big Charlie Kohler told me it doesn't add anything but = more > drag...thus less speed. >=20 > I have no experience whatsoever with the Winglets. So my question to = you > guys is, do you have any experience telling you that it does work? = (this > is more for pilots who had both so they can tell the difference) >=20 > Thanks -- Ronald Stevens --Apple-Mail-434-627271562 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252 there = are two questions: stability and speed.

if you go = into the archives you will find comments about both.
My = favorite on the speed is in the series of drag reduction articles by = Fred Moreno:

se= arch the doc for "winglets" and find "side note on = winglets"

I don't know what the full argument = for stability comes down to aerodynamically.
....is it simply = the added span?
I can say that the roll input required with = winglets is unpleasant at high speeds.

careful = on the buy.   the airframe could be perfect but still lots of = gremlins in the = systems.

Colyn



On Jun 7, 2011, at 2:18 PM, RONALD STEVENS = wrote:

Hello = guys.
I = like to introduce myself, I am 50, European/American, former = Cirrus

I am a future Lancair 4p owner (looking to buy one = these weeks, so if
you know someone who wants to sell his let me know) and looked = at a few

Now about the winglets (my first = question);
more stability etc, even the CAFE report is telling = that it produces
more stability at higher altitude.

But=85even the big = Charlie Kohler told me it doesn't add anything but more
drag...thus less = speed.
I = have no experience whatsoever with the Winglets. So my question to = you
guys = is, do you have any experience telling you that it does work? = (this
is = more for pilots who had both so they can tell the difference)

Thanks -- Ronald = Stevens

= --Apple-Mail-434-627271562--