X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 17 Jul 2012 11:51:33 -0400 Message-ID: X-Original-Return-Path: Received: from hrndva-omtalb.mail.rr.com ([71.74.56.122] verified) by logan.com (CommuniGate Pro SMTP 5.4.6) with ESMTP id 5655755 for lml@lancaironline.net; Tue, 17 Jul 2012 11:23:50 -0400 Received-SPF: none receiver=logan.com; client-ip=71.74.56.122; envelope-from=Wolfgang@MiCom.net X-Original-Return-Path: X-Authority-Analysis: v=2.0 cv=StQSGYy0 c=1 sm=0 a=MHZY6FYWMEQOp7S43i2QIw==:17 a=3Zlka_XeuxsA:10 a=ttCsPuSJ-FAA:10 a=rTjvlri0AAAA:8 a=Ia-xEzejAAAA:8 a=Yrnf4CeYszAKqYubsEAA:9 a=wPNLvfGTeEIA:10 a=EzXvWhQp4_cA:10 a=SSmOFEACAAAA:8 a=yMhMjlubAAAA:8 a=vr5Q5WBrAAAA:8 a=adc_5ng_pkpWxwxDEkMA:9 a=gKO2Hq4RSVkA:10 a=_W_S_7VecoQA:10 a=D403zBTnw2wA:10 a=MHZY6FYWMEQOp7S43i2QIw==:117 X-Cloudmark-Score: 0 X-Originating-IP: 74.218.201.50 Received: from [74.218.201.50] ([74.218.201.50:1386] helo=lobo) by hrndva-oedge03.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id 0E/F5-00797-46385005; Tue, 17 Jul 2012 15:23:16 +0000 X-Original-Message-ID: <012201cd6430$13f34410$6701a8c0@lobo> From: "Wolfgang" X-Original-To: References: Subject: Re: [LML] TAS for Red Line X-Original-Date: Tue, 17 Jul 2012 11:23:11 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_011F_01CD640E.8CAAB590" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_011F_01CD640E.8CAAB590 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable There ate two things that identify Vne, structural loads and flutter.=20 The lower of the two will determine the published Vne. The structural limit is determined by IAS. The flutter limit is determined by TAS. I have not been able to find a clear statement of how the flutter speed = of the Lancairs was determined. Wolfgang ----- Original Message -----=20 From: Michael Newman=20 To: lml@lancaironline.net=20 Sent: Monday, July 16, 2012 8:12 AM Subject: RE: [LML] TAS for Red Line You said: =20 I've never met a light aircraft instrument system that had a primary = airspeed indicator with anything *other* than IAS, and just one redline = value. =20 My Sailplane is licensed in the Standard category. The required = airspeed markings show Vne at a variety of altitudes. In this sailplane = Vne reduces quite a bit at FL180 and at FL250. As you stated the Vne = numbers are IAS values. ------=_NextPart_000_011F_01CD640E.8CAAB590 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
There ate two things that identify Vne, = structural=20 loads and flutter.
The lower of the two will determine the = published=20 Vne.
The structural limit is determined by=20 IAS.
The flutter limit is determined by=20 TAS.
 
I have not been able to find a clear = statement of=20 how the flutter speed of the Lancairs was determined.
 
Wolfgang
 
----- Original Message -----
From:=20 Michael=20 Newman
Sent: Monday, July 16, 2012 = 8:12 AM
Subject: RE: [LML] TAS for Red = Line

You=20 said:

 

I've never met a = light aircraft=20 instrument system that had a primary airspeed indicator with anything = *other*=20 than IAS, and just one=20 redline value.

 

My=20 Sailplane is licensed in the Standard category. The required airspeed = markings=20 show Vne at a variety of altitudes. In this sailplane Vne reduces = quite a bit=20 at FL180 and at FL250. As you stated the Vne numbers are IAS=20 values.

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