X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [71.42.21.121] (account marv@lancaironline.net) by logan.com (CommuniGate Pro WEBUSER 5.3c4) with HTTP id 4033822; Mon, 21 Dec 2009 12:19:34 -0500 From: marv@lancair.net Subject: The last (vne) word To: Cc: n427jb@bellsouth.net X-Mailer: CommuniGate Pro WebUser v5.3c4 Date: Mon, 21 Dec 2009 12:19:34 -0500 Message-ID: In-Reply-To: <122120091655.2587.4B2FA8990008125300000A1B22230650029B0A02D2089B9A019C04040A0DBF0D06C9CDCB02@att.net> References: <122120091655.2587.4B2FA8990008125300000A1B22230650029B0A02D2089B9A019C04040A0DBF0D06C9CDCB02@att.net> MIME-Version: 1.0 Content-Type: text/html;charset=iso-8859-1 Content-Transfer-Encoding: 8bit
Posted for Joe Bartels, n427jb@bellsouth.net:

 I have stood by after reading most, if not all, of the listings on the Vne
issue.  The fact is that with every aircraft that either Lance or I developed,
studies were conducted to determine what the Vne should be.  These engineering
efforts are based on a series of calculations, ground vibration tests and
other information, including actual flying tests to confirm that the published
Vne is a reasonable and safe number.
 
 Composite aircraft are generally designed to a higher standard than aluminum
aircraft based on "environmental" issues that cannot be fully determined,
thus, these composite aircraft are "stronger" than aluminum aircraft when
stressed to the same levels.  That does not mean that all composite aircraft
are stronger than aluminum, it just means that when the environmental factor
is added, the composite aircraft will not be weaker than a similarly designed
aluminum aircraft.  This means that the Vne should never be disregarded
whether in an aluminum or composite aircraft.
 
 There is nothing that Lancair can do to stop pilots of aircraft built from
its kits from flying beyond Vne.  Under the right circumstances (higher than
normal gust loading, inadvertent flight into thunderstorms, incorrectly flown
flight maneuvers, etc.) nature will resolve the issue and certainly that pilot
will not fly beyond Vne again.  
 
 I am not making light of this subject.  In 2008, Lancair was brought to the
forefront of the FAA's attention by the rather extraordinary number of
accidents it experienced.  Certain individuals at the FAA thought a letter
should be sent out explaining that aircraft with high wing loadings should
have equipment such as AOA indicators, stall warning indicators, etc.  That
letter was rescinded because I, along with a number of FAA personnel were
working together on a final draft that had not be agreed upon.  Whether
another letter will come forth or not is unknown.  Truly, Lancair does
encourage the use of AOA indicators and/or stall warning indicators, but not
as an alternative to extensive and repetitive training.  
 
 The various participants in this "spirited debate" have offered their
opinions and each should be accepted for what it offers, however, it is
Lancair's considered opinion that flight above Vne is a trip into the unknown.
 While under perfect conditions it may be successful, but under others, such
as the two in flight break-ups that have been discussed herein, they were not.
 It is not just speed......it is speed and loading that causes the tragedy
that befalls the families of those left behind and the added expense to
Lancair in having to defend frivolous law suits that normally follow.
 
 Congratulations to Jeff Edwards on his first flight of Shelby's new Evolution
:)
 
 Happy Holidays to each and every one of you and may we all participate in a
full and happy new year!
 
 Joe