X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Wed, 02 Dec 2009 09:37:25 -0500 Message-ID: X-Original-Return-Path: Received: from mta11.charter.net ([216.33.127.80] verified) by logan.com (CommuniGate Pro SMTP 5.3c3) with ESMTP id 3998539 for lml@lancaironline.net; Tue, 01 Dec 2009 21:34:44 -0500 Received-SPF: pass receiver=logan.com; client-ip=216.33.127.80; envelope-from=farnsworth@charter.net Received: from imp09 ([10.20.200.9]) by mta11.charter.net (InterMail vM.7.09.02.04 201-2219-117-106-20090629) with ESMTP id <20091202023408.PYYG8038.mta11.charter.net@imp09> for ; Tue, 1 Dec 2009 21:34:08 -0500 Received: from Farnsworth ([75.139.158.86]) by imp09 with smtp.charter.net id C2a41d0041s7vFP052a7Mq; Tue, 01 Dec 2009 21:34:07 -0500 X-Authority-Analysis: v=1.0 c=1 a=Ia-xEzejAAAA:8 a=qjWFK38hcDIDbJ7V7qYA:9 a=ApBT58vYB28E5WdfOA4A:7 a=LOSOBWKjOQDZkMPfp2QcVjdO_y4A:4 a=EzXvWhQp4_cA:10 a=uv8huMj4WZkvnUV_:21 a=KMN_fLWV6Lacw54f:21 a=SSmOFEACAAAA:8 a=nGBUaqCQM0LGPUjwilQA:9 a=iURdPcrk4TbsOXg10XQA:7 a=9Zx6FWyYtYKhIrvMU7184i6zpLAA:4 From: "farnsworth" X-Original-To: "'Lancair Mailing List'" References: Subject: RE: [LML] Vne X-Original-Date: Tue, 1 Dec 2009 21:34:09 -0500 X-Original-Message-ID: <5F228165BE3A49FEB30134C8E622B878@Farnsworth> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0042_01CA72CE.07192BC0" X-Mailer: Microsoft Office Outlook 11 In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Thread-Index: Acpy8f4kes2zcQdXSWGWoLk8QoaTEgAA0Zkg This is a multi-part message in MIME format. ------=_NextPart_000_0042_01CA72CE.07192BC0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit There is one other thing to consider when true airspeed is well above indicated airspeed, Mach number; or more accurately limiting Mack number. My Super Legacy has been well above the VNE that is listed by Lancair. During the construction I became concerned (after seeing pictures of a Legacy accident ) about the strength of the fuselage. As a result, Greg Cole was asked what he thought. He said that, due to the expected higher airspeeds, he was not comfortable with the standard fuselage being able to safely handle the expected flight envelope. His suggested modification was done and he said I am now good to .6 Mach. Some of our Lancairs can reach true airspeeds where Mach can be a consideration. Just a thought. Lynn Farnsworth Super Legacy #235 TSIO-550 Powered Race $44 _____ From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Jon Socolof Sent: Tuesday, December 01, 2009 8:51 PM To: lml Subject: [LML] Vne I believe all airspeeds placarded on your airspeed indicator are "indicated" airspeeds It is true that as you climb, your true airspeed increases. Vne is an indicated limit, not a "true" limit. The aerodynamic forces, stresses, and local stream velocities are dependant on what the airplane is sees -- and it only knows about the indicated values. So it should not be possible to "exceed" Vne if your airspeed indicator does not go beyond the red line. JS ------=_NextPart_000_0042_01CA72CE.07192BC0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

There is one other thing to = consider when true airspeed is well above indicated airspeed, Mach number; or more = accurately limiting Mack number.

My Super Legacy has been well above = the VNE that is listed by Lancair. During the construction I became concerned = (after seeing pictures of a Legacy accident
) about the strength of the fuselage. As a result, Greg Cole was asked = what he thought. He said that, due to the expected higher airspeeds, he was not comfortable with the standard fuselage being able to safely handle the = expected flight envelope.

 

His suggested modification was done = and he said I am now good to .6 Mach.

 

Some of our Lancairs can = reach  true airspeeds where Mach can be a = consideration.

 

Just a = thought.

 

Lynn = Farnsworth

Super Legacy = #235

TSIO-550 = Powered

Race $44 =   

 

From: = Lancair Mailing List = [mailto:lml@lancaironline.net] On Behalf Of Jon Socolof
Sent: Tuesday, December = 01, 2009 8:51 PM
To: lml
Subject: [LML] = Vne

 

I believe all = airspeeds placarded on your airspeed indicator are "indicated" airspeeds = It is true that as you climb, your true airspeed = increases.

Vne is an indicated = limit, not a "true" limit. The aerodynamic forces, stresses, and = local stream velocities are dependant on what the airplane is sees -- and it only = knows about the indicated values. So it should not be possible to = "exceed" Vne if your airspeed indicator does not go beyond the red = line.

 

JS

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