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Date: Fri, 26 Jun 2009 14:14:31 -0400
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Subject: Guidance on GTOW
From: Bryan Wullner <vonjet@gmail.com>
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I have a topic for discussion. If the factory, Lancair, designs and builds
an airplane.  The airplane is tested. They come up with limits for the
airplane and publish a POH.  They give the aircraft a Gross Weight.  In the
320/360 they assign a MGTOW of 1790 lbs. The maximum weight for landing is
1685.
Recently I asked what the gross weight of the Lancair 360 was. I got
multiple answers and all, except one,  were different than what Lancair
published.  I was also told you make up the gross weight. It can be what
ever you want.
My question is this.......how can we operate these aircraft as safely as
possible when most are disregarding the number the designer assigned as a
gross weight for the aircraft?  I know 3 lancair 360's with a claim of a
2100lb Gross weight. Only 400lbs over the highest number the factory would
allow.......400LBS
I could see assigning 1800 lbs but 400lbs over the published limit?
I realize you can take the risk of how the aircraft will behave or if the
gear will handle the heavier loads since its your airplane but if our goal
is promote safe operation of these aircraft and reduce accidents why would
you want to assign a number higher than what the designer assigned?

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I have a topic for discussion.=A0<div>If the factory, Lancair, designs and =
builds an airplane. =A0The airplane is tested. They come up with limits for=
 the airplane and publish a POH. =A0They give the aircraft a Gross Weight. =
=A0In the 320/360 they assign a MGTOW of 1790 lbs. The maximum weight for l=
anding is 1685.</div>
<div>Recently I asked what the gross weight of the Lancair 360 was. I got m=
ultiple answers and all, except one, =A0were different than what Lancair pu=
blished. =A0I was also told you make up the gross weight. It can be what ev=
er you want.</div>
<div>My question is this.......how can we operate these aircraft as safely =
as possible when most are disregarding the number the designer assigned as =
a gross weight for the aircraft? =A0I know 3 lancair 360&#39;s with a claim=
 of a 2100lb Gross weight. Only 400lbs over the highest number the factory =
would allow.......400LBS=A0</div>
<div>I could see assigning 1800 lbs but 400lbs over the published limit?</d=
iv><div>I realize you can take the risk of how the aircraft will behave or =
if the gear will handle the heavier loads since its your airplane but if ou=
r goal is promote safe operation of these aircraft and reduce accidents why=
 would you want to assign a number higher than what the designer assigned?<=
/div>
<div><br></div><div><br></div>

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