X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 07 Jun 2013 08:11:13 -0400 Message-ID: X-Original-Return-Path: Received: from nm38-vm0.bullet.mail.bf1.yahoo.com ([72.30.239.16] verified) by logan.com (CommuniGate Pro SMTP 6.0.5) with ESMTPS id 6312201 for lml@lancaironline.net; Fri, 07 Jun 2013 03:01:38 -0400 Received-SPF: none receiver=logan.com; client-ip=72.30.239.16; envelope-from=chris_zavatson@yahoo.com Received: from [98.139.212.145] by nm38.bullet.mail.bf1.yahoo.com with NNFMP; 07 Jun 2013 07:01:02 -0000 Received: from [98.139.211.161] by tm2.bullet.mail.bf1.yahoo.com with NNFMP; 07 Jun 2013 07:01:00 -0000 Received: from [127.0.0.1] by smtp218.mail.bf1.yahoo.com with NNFMP; 07 Jun 2013 07:01:00 -0000 X-Yahoo-Newman-Id: 896919.26846.bm@smtp218.mail.bf1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: QMOuozEVM1nevD0C3a_i90EiuTp8VGfct0mu3j9d3JzOrxp Ay7hIsTb2M1mjpjhegJzhlUOJV_b6uq2iqdcJhoBmE0UEAMQoqhZ5bkdFjgC R.AasvuWthOHaS5ynv1cR_m5pDd2fMXUgSZVFVS4Y.coEYYsU5gQB8R4wmHH wuv.wzXJ4J8RyedYpPLowDiVot9RHOncNHxHu5kInGR4zCbjel8IysXmR.Gv dG0icAk9c9ogVUY8QKTB6DUXYVwIEmXV0JE2MtIi3l4JvxdnDog6AKfGS2Rk bbQeX.SkQtHQmk0Crf0kKN69l2WS7dgb9jSemKUp.7FgJJkQucrCpywC0Ybd Q7r00qQPD.YqJKPFW2snO5ZHRVINlMhxdp8ueSNwvwzrtHIjSf7WOQj4cIEX cRewsMQSnWWZb2qpIKPgexEwh2fOs4XL77f_Hmff5GgshrlBDihwtDYUHakj mWs.n4nPuPyyIIbdf1KbnEqEIn_lBwXVA9cKNlXiYd5uZIPF6gdUFl88aEU9 1B9alX8qge20.Z.1RMM6aK6xWyAYkwmY5XUBcFubEys2lL6AhiORyngY152H 6BofdECYd0mKFaLJMtlfvSkpj1ggeF2_DLmTfaqhILV8IXFr5pUFmNi5buCr YEUmS9KQLLadB6iO7TSQcx8lPdKaDbPyPt3btuySxcNwkjJz7zMlbWpucBj8 Xtj28mxCM5CUY12jGGPN1MF3TBqaE1n4C2gCUH8DhCpw7vSzV9UcFbBR5W8y paCZILgmSrEs07RtT X-Yahoo-SMTP: 076hgjCswBC.G6e0vm7vgvZ9JJ0zmeBo_Oyw X-Rocket-Received: from [192.168.169.9] (chris_zavatson@98.155.147.172 with ) by smtp218.mail.bf1.yahoo.com with SMTP; 07 Jun 2013 00:01:00 -0700 PDT Subject: Re: [LML] Re: VORTEX GENERATORS References: From: Chris Content-Type: multipart/alternative; boundary=Apple-Mail-52C45226-B9C5-44FE-AD5E-FA6A7A9C5EA6 X-Mailer: iPad Mail (9B206) In-Reply-To: X-Original-Message-Id: X-Original-Date: Thu, 6 Jun 2013 21:00:54 -1000 X-Original-To: Lancair Mailing List Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (1.0) --Apple-Mail-52C45226-B9C5-44FE-AD5E-FA6A7A9C5EA6 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Being somewhat interested in aircraft efficiency, two quotes from the VG web= site jumped out at me. On the Lancair page: " A 10 knot reduction in the stall speed; much better low speed handling and= no reduction in the cruise speed." Then on the FAQ page: " At maximum power, you may experience a 0-4 mph reduction, but this depends= on the particular aircraft. At normal cruising speed there is no noticeable= reduction. " For me maximum power typically is cruise power. The speed loss will tend to= be on the higher side in a low drag airframe. VGs locally energize the boundary layer to keep the flow attached. This tak= es energy. Unfortunately a nice laminar flow section is turned into a partia= lly turbulent flow wing. Everything is a trade-off. A previous link on the LML to Bob Belshe's 235 VG mod also reported a reduct= ion in cruise speed of a couple knots. Here is another link to a flight test report of a Bonanza with a VG upgrade.= http://www.nar-associates.com/technical-flying/vortex/Vgs_cruise_wide_screen= .pdf Chris Zavatson N91CZ 360std www.N91CZ.net Sent from my spiffy iPad On Jun 4, 2013, at 3:55 AM, Rob Murawski wrote: > Nice info on the VG's! I've been contemplating whether to install the ext= ended wingtips on my 360 MkII, now it looks like I have another option to re= duce the stall speed. Assuming I even need that. >=20 > This doesn't make the decision-making process any easier. >=20 > -Rob > Lancair 360MkII > 15% Complete > Pittsburgh, PA >=20 > From: PETER WILLIAMS > Reply-To: Lancair Mailing List > Date: Tuesday, June 4, 2013 7:42 AM > To: > Subject: [LML] VORTEX GENERATORS >=20 > HI THERE >=20 > here is the link for vortex generator kits for Lancair aircraft >=20 > http://www.pnwaero.com/Lancair.htm >=20 > i was very happy with the company and with the results >=20 > peter williams --Apple-Mail-52C45226-B9C5-44FE-AD5E-FA6A7A9C5EA6 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8
Being somewhat intere= sted in aircraft efficiency, two quotes from the VG website jumped out at me= .

On the Lancair page:
" A 10 knot reduction i= n the stall speed; much better low speed handling and no reduction in= the cruise speed."
Then on the FAQ page:
"=  At maximum power, you may experience a 0-4 mph reduction, but t= his depends on the particular aircraft. At normal cruising speed there i= s no noticeable reduction. "

For me maximum po= wer typically is cruise power.  The speed loss will tend to be o= n the higher side in a low drag airframe.

VGs local= ly energize the boundary layer to keep the flow attached.  This takes e= nergy. Unfortunately a nice laminar flow section is turned into a partially t= urbulent flow wing. Everything is a trade-off.

A pr= evious link on the LML to Bob Belshe's 235 VG mod also reported a reduction i= n cruise speed of a couple knots.

Here is another li= nk to a flight test report of a Bonanza with a VG upgrade.
http://www.nar-associates.com/technical-flying/vortex/Vgs_cruise_wide_s= creen.pdf

Chris Zavatson
N91CZ
360std=

= Sent from my spiffy iPad

On Jun 4, 2013, at 3:55 AM, Rob Muraw= ski <rob@robmurawski.com> w= rote:

Nice info o= n the VG's!  I've been contemplating whether to install the extended wi= ngtips on my 360 MkII, now it looks like I have another option to reduce the= stall speed.  Assuming I even need that.

This= doesn't make the decision-making process any easier.

-Rob
Lancair 3= 60MkII
15% Complete
Pittsburgh, PA

<= span id=3D"OLK_SRC_BODY_SECTION">
<= span style=3D"font-weight:bold">From: PETER WILLIAMS <peterpawaviation@hotmail.com>Reply-To: Lancair Mailing List <= ;lml@lancaironline.net>
<= span style=3D"font-weight:bold">Date: Tuesday, June 4, 2013 7:42 AM<= br>To: <lml@lancaironline.net>
Subject: [LML] VORTEX GENERATORS

HI THERE

here is= the link for vortex generator kits for Lancair aircraft

http://www.pnwaero.com/= Lancair.htm

i was very happy with the company and with the result= s

peter williams
= --Apple-Mail-52C45226-B9C5-44FE-AD5E-FA6A7A9C5EA6--