X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 12 Jun 2011 12:55:23 -0400 Message-ID: X-Original-Return-Path: Received: from elasmtp-galgo.atl.sa.earthlink.net ([209.86.89.61] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTP id 5017035 for lml@lancaironline.net; Sat, 11 Jun 2011 00:16:24 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.61; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=MxNmbMyCpaW7/okDu1C7dhRhge+B74Xu7wFhkR6DEJs/1l26zJY9tJumRghx7F4/; h=Received:Subject:Mime-Version:Content-Type:From:X-Priority:In-Reply-To:Date:Message-Id:References:To:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [216.57.118.194] (helo=[192.168.1.100]) by elasmtp-galgo.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1QVFbw-000051-1r for lml@lancaironline.net; Sat, 11 Jun 2011 00:15:49 -0400 Subject: [LML] Winglets? And introducing myself as a very near future 4p owner. Mime-Version: 1.0 (Apple Message framework v1082) Content-Type: multipart/alternative; boundary=Apple-Mail-523-893549409 From: Colyn Case X-Priority: 3 In-Reply-To: X-Original-Date: Sat, 11 Jun 2011 00:15:47 -0400 X-Original-Message-Id: References: X-Original-To: "lml@lancaironline.net List" X-Mailer: Apple Mail (2.1082) X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da940042bb7db4d4a433e6d32c2d5ef1aace5350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 216.57.118.194 --Apple-Mail-523-893549409 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 Another comment on winglets. My theory is the most important speed is your SL speed. Suppose you are flying 1350 nautical miles. Westbound you have a 40 knot headwind at 5000 increasing to 100 knots at = fl200. Eastbound let's say you get a 40 knot tailwind at fl200. (Doesn't it = usually work out that way?) Someone offers you mod A that gives you 10 knots at 5000 or mod B that = gives you 10 knots at fl200. ...and let's say your plane does 225 knots at 5000 unmodified. mod A gives you 10/(225-40) or 5.4% improvement which you enjoy for 6.9 = hours mod B gives you 10/(270+40) or 3.2% improvement which you enjoy for 4.2 = hours So even if the winglets delivered performance up high they don't seem = like a very good deal. Colyn > On Jun 7, 2011, at 2:18 PM, RONALD STEVENS wrote: >=20 >> 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 >=20 > =20 > --Apple-Mail-523-893549409 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252
On Jun 7, 2011, at 2:18 PM, RONALD STEVENS wrote:

Hello = guys.
 
I like to = introduce=20 myself, I am 50, European/American, former Cirrus
SR22 (1100 = hours) and=20 Velocity TXL5 (250 hours, just sold this plane)
(total 1400=20 hours).
 
I am a future = Lancair 4p=20 owner (looking to buy one these weeks, so if
you know = someone who=20 wants to sell his let me know) and looked at a few
Lancair 4p=20 already.
 
Now about the = winglets=20 (my first question);
Some planes I = looked at=20 had their winglets, some not. All those that did not had one told me = it=20 doesn't do anything, the ones they had did told me it works = great,
more stability = etc, even=20 the CAFE report is telling that it produces
more stability = at higher=20 altitude.
 
But=85even the = big Charlie=20 Kohler told me it doesn't add anything but more
drag...thus = less=20 speed.
 
I have no = experience=20 whatsoever with the Winglets. So my question to you
guys is, do = you have any=20 experience telling you that it does work? (this
is more for = pilots who=20 had both so they can tell the difference)
 
Thanks -- = Ronald=20 Stevens
 
<glasair new pnt.jpg><AC home after painting = 001.jpg>
= --Apple-Mail-523-893549409--