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Subject: Re: [LML] Re: Strut Pressure
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Will this technique work on a Legacy?

LarryE



Don Karich <donkarich@gmail.com> 
Sent by: "Lancair Mailing List" <lml@lancaironline.net>
08/11/2009 02:42 PM
Please respond to
"Lancair Mailing List" <lml@lancaironline.net>


To
lml@lancaironline.net
cc

Subject
[LML] Re: Strut Pressure






My technique is to carefully increase the high pressure nitrogen bottle, 
constantly shaking the wing to avoid a slight bind in the shaft that would 
permit a sudden jolt overpressering and damaging the seal. I find it takes 
about 250-400 psi to raise the shaft. I raise it about 4 inches on the 
Legacy and slightly overfill it so I can final adjust it with tapping the 
pin on the schrader valve to release pressure. The goal is to get both 
main even at about 4 inchs. Shake out the wing tips to verify height.  

On Wed, Aug 5, 2009 at 8:55 AM, Bob B. <rbelshe@comcast.net> wrote:
Pete,

This is the method I use:
.  Airplane on the ground, empty
.  Add nitrogen to strut until it is fully extended
.  Remove the filler hose
.  Using a pin punch and a small hammer, make very light taps on the
Schrader valve stem until it drops to about 1/2" below fully extended.
.  There is some hysteresis, so between taps pull down on the prop (or 
lift
the tail) to see the actual position.


Bob Belshe
Moraga, CA
Lancair 235/320
http://home.comcast.net/~rbelshe/


-----Original Message-----
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of 
Peter
Field
Sent: Wednesday, August 05, 2009 7:34 AM
To: lml@lancaironline.net
Subject: [LML] Strut Pressure


 Does anyone know what the nitrogen pressure ought to be on the nose 
landing
gear strut of a Lancair 360?

Pete Field
LNC2, N775DX


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<br><font size=2 face="sans-serif">Will this technique work on a Legacy?</font>
<br>
<br><font size=2 face="sans-serif">LarryE</font>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td width=40%><font size=1 face="sans-serif"><b>Don Karich &lt;donkarich@gmail.com&gt;</b>
</font>
<br><font size=1 face="sans-serif">Sent by: &quot;Lancair Mailing List&quot;
&lt;lml@lancaironline.net&gt;</font>
<p><font size=1 face="sans-serif">08/11/2009 02:42 PM</font>
<table border>
<tr valign=top>
<td bgcolor=white>
<div align=center><font size=1 face="sans-serif">Please respond to<br>
&quot;Lancair Mailing List&quot; &lt;lml@lancaironline.net&gt;</font></div></table>
<br>
<td width=59%>
<table width=100%>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">To</font></div>
<td><font size=1 face="sans-serif">lml@lancaironline.net</font>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">cc</font></div>
<td>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td><font size=1 face="sans-serif">[LML] Re: Strut Pressure</font></table>
<br>
<table>
<tr valign=top>
<td>
<td></table>
<br></table>
<br>
<br>
<br><font size=3>My technique is to carefully increase the high pressure
nitrogen bottle, constantly shaking the wing to avoid a slight bind in
the shaft that would permit a sudden jolt overpressering and damaging the
seal. I find it takes about 250-400 psi to raise the shaft. I raise it
about 4 inches on the Legacy and slightly overfill it so I can final adjust
it with tapping the pin on the schrader valve to release pressure. The
goal is to get both main even at about 4 inchs. Shake out the wing tips
to verify height.&nbsp; <br>
</font>
<br><font size=3>On Wed, Aug 5, 2009 at 8:55 AM, Bob B. &lt;</font><a href=mailto:rbelshe@comcast.net><font size=3 color=blue><u>rbelshe@comcast.net</u></font></a><font size=3>&gt;
wrote:</font>
<br><font size=3>Pete,<br>
<br>
This is the method I use:<br>
. &nbsp;Airplane on the ground, empty<br>
. &nbsp;Add nitrogen to strut until it is fully extended<br>
. &nbsp;Remove the filler hose<br>
. &nbsp;Using a pin punch and a small hammer, make very light taps on the<br>
Schrader valve stem until it drops to about 1/2&quot; below fully extended.<br>
. &nbsp;There is some hysteresis, so between taps pull down on the prop
(or lift<br>
the tail) to see the actual position.<br>
<br>
<br>
Bob Belshe<br>
Moraga, CA<br>
Lancair 235/320</font><font size=3 color=blue><u><br>
</u></font><a href=http://home.comcast.net/~rbelshe/ target=_blank><font size=3 color=blue><u>http://home.comcast.net/~rbelshe/</u></font></a>
<br><font size=3><br>
<br>
-----Original Message-----<br>
From: Lancair Mailing List [mailto:</font><a href=mailto:lml@lancaironline.net><font size=3 color=blue><u>lml@lancaironline.net</u></font></a><font size=3>]
On Behalf Of Peter<br>
Field<br>
Sent: Wednesday, August 05, 2009 7:34 AM<br>
To: </font><a href=mailto:lml@lancaironline.net><font size=3 color=blue><u>lml@lancaironline.net</u></font></a><font size=3><br>
Subject: [LML] Strut Pressure<br>
<br>
<br>
&nbsp;Does anyone know what the nitrogen pressure ought to be on the nose
landing<br>
gear strut of a Lancair 360?<br>
<br>
Pete Field<br>
LNC2, N775DX<br>
<br>
<br>
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