X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 04 Jun 2009 06:22:54 -0400 Message-ID: X-Original-Return-Path: Received: from web36901.mail.mud.yahoo.com ([209.191.85.69] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with SMTP id 3671129 for lml@lancaironline.net; Wed, 03 Jun 2009 23:20:43 -0400 Received-SPF: none receiver=logan.com; client-ip=209.191.85.69; envelope-from=chris_zavatson@yahoo.com Received: (qmail 57405 invoked by uid 60001); 4 Jun 2009 03:20:08 -0000 DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:X-YMail-OSG:Received:X-Mailer:References:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=xlH60yY7apXKNBiP4Kp5CtfoRmir53wSoi7tpEo1z8b2IyzuOm8ciPpdCu6AuCdJImduQUUxLp+f4FwvLsieRIboMZk9EK8DM68ASmVx0qdZH1bDUH4EYaeG2oQyK6plLSiR05w1+P+IxdPcRhZUYZk8ZknHEThfdFggthR9qBQ=; X-Original-Message-ID: <651661.51121.qm@web36901.mail.mud.yahoo.com> X-YMail-OSG: Gs7AqBIVM1mwTHFj.OjZoimMWBjkNr1gZfk7JQSxGR7wHUFHJUmtxsBDLXNitS3IS1hFeQIc4yXr44D47kJK1I1PKaQAoDQCFl21Db5LNGwSs7sk2Jr8fb5lrOC_nz1mis2gA8rtmYFUybFs.LURSh9gO8XIuD3JR0MEzv_vAmkthPslV5pFLUEaEoY4LOGcJxWj4NVac05q_3fXuYwl2Q5cIAJh2H_sjaoDBaSCbJgRb36_.VOwYPUnzvQOAyFLhqrH0TeqlLKBU9MaJkZQKwdL9KFOWfRo4zJieVF4lkk1gMhV67psTW0fjZFyWilBbHWD9.khQOCYGksXVPTCdLEFkPUYeSl8tcUCS266GFTlaOwJnASJ Received: from [149.32.224.34] by web36901.mail.mud.yahoo.com via HTTP; Wed, 03 Jun 2009 20:20:06 PDT X-Mailer: YahooMailRC/1277.43 YahooMailWebService/0.7.289.10 References: X-Original-Date: Wed, 3 Jun 2009 20:20:06 -0700 (PDT) From: Chris Zavatson Subject: Re: [LML] L360 winglets X-Original-To: Lancair Mailing List In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1222700629-1244085606=:51121" --0-1222700629-1244085606=:51121 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Rob,=0AWinglets reduce the induced drag generated when operating at high li= ft coefficients i.e. high angles of attack.=A0 This provides benefits durin= g take off and at high altitude cruise.=A0 When flying near the service cei= ling, indicated airspeed will be low and the lift coefficient=A0 high.=A0 I= n these conditions, winglets are effective in reducing total drag.=A0 Most = 360s, however, spend most of their time flying well below their service cei= ling at relatively low lift coefficients.=A0 At these lower altitudes, the = extra parasitic drag caused by having the winglets outweighs=A0any reductio= n in induced drag they provide.=A0 It is the mission profile of the plane t= hat will determine it they are worth investigating.=0A=0AChris Zavatson=A0= =A0=A0 =0AN91CZ=0A360std=0Awww.N91CZ.com=A0 =0A=0A=0A --0-1222700629-1244085606=:51121 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Rob,
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Winglets reduce the induced drag generated when= operating at high lift coefficients i.e. high angles of attack.  This= provides benefits during take off and at high altitude cruise.  When = flying near the service ceiling, indicated airspeed will be low and the lif= t coefficient  high.  In these conditions, winglets are effective= in reducing total drag.  Most 360s, however, spend most of their time= flying well below their service ceiling at relatively low lift coefficient= s.  At these lower altitudes, the extra parasitic drag caused by havin= g the winglets outweighs any reduction in induced drag they provide.&n= bsp; It is the mission profile of the plane that will determine it they are= worth investigating.
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Chris Zavatson =   
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N91CZ
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360std
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