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X-Original-To: lml@lancaironline.net
Subject: Re: [LML] Vne is NOT a meaningless number
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The real question everyone should ask is: "how does a manufacturer establi=
sh Vne?"  Rob Wolfe a respected aeronautical engineer or  Pete Field or Ru=
dy Haug (real test pilots) can chime in here and describe how it is done=
 and what the consequences of ignoring it are. One IVP was lost years ago=
 when it exceeded Vne.

Jeff


-----Original Message-----
From: Craig Berland <cberland@systems3.net>
To: lml
Sent: Tue, Dec 1, 2009 7:47 pm
Subject: [LML] Vne is NOT a meaningless number




Bill,
=20
Advertised true cruise speed in the IV-P is well above Vne so this can=E2=
=80=99t be true for a lot of airplanes.  I believe Vne is a subjective num=
ber as I have never heard of any airframe manufacturer diving a plane to=
 a speed  it self-destructs.  However, I also respect Vne.
=20
Craig Berland
IV-P  N7VG

=20
Van of Van's Aircraft wrote about VNE a couple of years ago. Much to my su=
rprise, VNE is true airspeed, not indicated. It's pretty easy to exceed in=
 my Lancair. Results can be explosive, meaning onset of flutter to compone=
nt failure can be nearly instantaneous. I can't wear a parachute in my pla=
ne (Lancair 320), so I wouldn't screw around with it. Bill Kennedy




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<font color=3D'black' size=3D'2' face=3D'arial'>
<div>The real question everyone should ask is: "how does a manufacturer&nb=
sp;establish Vne?"&nbsp; Rob Wolfe a respected aeronautical engineer or &n=
bsp;Pete Field or Rudy Haug (real test pilots) can chime in here and descr=
ibe how it is done and what the consequences of ignoring it are. One IVP=
 was lost years ago when it exceeded Vne.</div>


<div>&nbsp;</div>


<div>Jeff<br>
<br>
</div>


<div style=3D"FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: arial">-----Orig=
inal Message-----<br>
From: Craig Berland &lt;cberland@systems3.net&gt;<br>
To: lml<br>
Sent: Tue, Dec 1, 2009 7:47 pm<br>
Subject: [LML] Vne is NOT a meaningless number<br>
<br>


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<div class=3DSection1>

<div>

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<div class=3DMsoNormal><SPAN style=3D"COLOR: #1f497d; FONT-FAMILY: 'Calibr=
i','sans-serif'">Bill,</SPAN></div>


<div class=3DMsoNormal><SPAN style=3D"COLOR: #1f497d; FONT-FAMILY: 'Calibr=
i','sans-serif'">&nbsp;</SPAN></div>


<div class=3DMsoNormal><SPAN style=3D"COLOR: #1f497d; FONT-FAMILY: 'Calibr=
i','sans-serif'">Advertised true cruise speed in the IV-P is well above Vn=
e so this can=E2=80=99t be true for a lot of airplanes.&nbsp; I believe Vn=
e is a subjective number as I have never heard of any airframe manufacture=
r diving a plane to a speed &nbsp;it self-destructs.&nbsp; However, I also=
 respect Vne.</SPAN></div>


<div class=3DMsoNormal><SPAN style=3D"COLOR: #1f497d; FONT-FAMILY: 'Calibr=
i','sans-serif'">&nbsp;</SPAN></div>


<div class=3DMsoNormal><SPAN style=3D"COLOR: #1f497d; FONT-FAMILY: 'Calibr=
i','sans-serif'">Craig Berland</SPAN></div>


<div class=3DMsoNormal><SPAN style=3D"COLOR: #1f497d; FONT-FAMILY: 'Calibr=
i','sans-serif'">IV-P&nbsp; N7VG</SPAN><SPAN style=3D"FONT-SIZE: 10pt; FON=
T-FAMILY: 'Tahoma','sans-serif'"></SPAN></div>
</div>
</div>


<div class=3DMsoNormal>&nbsp;</div>


<div class=3DMsoNormal><SPAN style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Verda=
na','sans-serif'">Van of Van's Aircraft wrote about VNE a couple of years=
 ago. Much to my surprise, VNE is true airspeed, not indicated. It's prett=
y easy to exceed in my Lancair. Results can be explosive, meaning onset of=
 flutter to component failure can be nearly instantaneous. I can't wear a=
 parachute in my plane (Lancair 320), so I wouldn't screw around with it.<=
SPAN style=3D"COLOR: #1f497d"> Bill Kennedy</SPAN><br>
<br>
</SPAN></div>
</div>
</div>
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