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Date: Fri, 24 Aug 2007 16:52:50 -0400
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From: "Jim Scales" <joscales98@hotmail.com>
Subject: ES Strut issues
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I have just finished the annual on my Super ES.

I discovered a cracked engine mount within ten minutes of starting the =
inspection.

I have experienced the "ES Shake" since the plane was new.  It now has =
about 860 hours on it.  I have done various things to the plane to =
address the problem through the years I have been flying it.  Some =
things seem to improve it, some don't make a difference.  The plane has =
never been without the shake completely.  The shake occurs at the same =
speed (30-32 knots) on rollout after landing and while on the brakes.  =
Releasing brake pressure makes the shake go away.

The following is a list of what I did the the plane during this annual, =
and had done previously, to help or eliminate the shake:

-Strut rebuild and update by Lancair (second time)
-Engine mount repair, update, reinforcement, inspection by Lancair
-New Cleveland brake discs
-Balance all tires and wheels
-Balance nose wheel pant
-Precisely align main gear both in toe and camber.
-Shim main gear legs to reduce "play" between leg and mount.
-Shim spindles to fit tightly to the gear legs

Test flight showed no noticeable improvement in the shake. =20

My next step is to mount a camcorder on the plane so that I can see the =
landing gear and attempt to determine if the origin of the problem is =
the nose wheel or the main gear.  I am inclined to believe it is the =
main gear.

I don't remember hearing anyone describe how the shake affects the =
controls.  The shake in my plane causes the stick to move front to rear =
in rapid cycles.  The plane feels like the tail is jumping up and down.  =
It would seem that a nose wheel shimmy would cause the plane to move =
side to side.  I don't think that is happening with mine.

I will post whatever I learn from the camcorder exercise.

In a related area, I don't recall hearing of or reading about what =
Lancair has done to help with this situation.  It is certainly possible =
that I just missed that part.

It seems that, with a large percentage of the ES fleet exhibiting the =
same issues under the same conditions, whatever they may be recommending =
is not working.  Perhaps they should do some more detective work =
(possibly check out some of the planes that show the problems), and help =
with a fix.  As I said, maybe I missed the part where this had been =
done, but I don't recall anyone ever mentioning to me that Lancair had =
discovered the source of the problem and determined the things that need =
to be done to eliminate it.  It would be impossible for me to believe =
the Columbia has this same problem.  Wonder what is different.

I know that I have put in a great amount of time and no small amount of =
expense to correct it and it ain't happened.  I gather from my =
conversations with other builders that I am not alone in those =
categories.

Just thought I would share.............

Jim Scales
Angel's Playmate


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<DIV>I have just finished the annual on my Super ES.</DIV>
<DIV>&nbsp;</DIV>
<DIV>I discovered a cracked engine mount within ten minutes of starting =
the=20
inspection.</DIV>
<DIV>&nbsp;</DIV>
<DIV>I have experienced the "ES Shake" since the plane was new.&nbsp; It =
now has=20
about 860 hours on it.&nbsp; I have done various things to the plane to =
address=20
the problem through the years I have been flying it.&nbsp; Some things =
seem to=20
improve it, some don't make a difference.&nbsp; The plane has never been =
without=20
the shake completely.&nbsp; The shake occurs at the same speed (30-32 =
knots) on=20
rollout after landing and while on the brakes.&nbsp; Releasing brake =
pressure=20
makes the shake go away.</DIV>
<DIV>&nbsp;</DIV>
<DIV>The following is a list of what I did the the plane during this =
annual, and=20
had done previously,&nbsp;to help or eliminate the shake:</DIV>
<DIV>&nbsp;</DIV>
<DIV>-Strut rebuild and update by Lancair (second time)</DIV>
<DIV>-Engine mount repair, update, reinforcement, inspection by =
Lancair</DIV>
<DIV>-New Cleveland brake discs</DIV>
<DIV>-Balance all tires and wheels</DIV>
<DIV>-Balance nose wheel pant</DIV>
<DIV>-Precisely align main gear both in toe and camber.</DIV>
<DIV>-Shim main gear legs to reduce "play" between leg and mount.</DIV>
<DIV>-Shim spindles to fit tightly to the gear legs</DIV>
<DIV>&nbsp;</DIV>
<DIV>Test flight showed no noticeable improvement in the shake.&nbsp; =
</DIV>
<DIV>&nbsp;</DIV>
<DIV>My next step is to mount a camcorder on the plane so that I can see =
the=20
landing gear and attempt to determine if the origin of the problem is =
the nose=20
wheel or the main gear.&nbsp; I am inclined to believe it is the main=20
gear.</DIV>
<DIV>&nbsp;</DIV>
<DIV>I don=92t remember hearing anyone describe how the shake affects =
the=20
controls.&nbsp; The shake in my plane causes the stick to move front to =
rear in=20
rapid cycles.&nbsp; The plane feels like the tail is jumping up and =
down.&nbsp;=20
It would seem that a nose wheel shimmy would cause the plane to move =
side to=20
side.&nbsp; I don=92t think that is happening with mine.</DIV>
<DIV>&nbsp;</DIV>
<DIV>I will post whatever I learn from the camcorder exercise.</DIV>
<DIV>&nbsp;</DIV>
<DIV>In a related area, I don=92t recall hearing of or reading about =
what Lancair=20
has done to help with this situation.&nbsp; It is certainly possible =
that I just=20
missed that part.</DIV>
<DIV>&nbsp;</DIV>
<DIV>It seems that, with a large percentage of the ES fleet exhibiting =
the same=20
issues under the same conditions, whatever they&nbsp;may =
be&nbsp;recommending is=20
not working.&nbsp; Perhaps&nbsp;they should do some more detective work=20
(possibly check out some of the planes that show the problems), and help =
with a=20
fix.&nbsp; As I said, maybe I missed&nbsp;the part where this had been =
done, but=20
I don=92t recall anyone ever mentioning to me that Lancair had =
discovered the=20
source of the problem and&nbsp;determined the things that need to be =
done to=20
eliminate it.&nbsp; It would be impossible for me to believe the =
Columbia has=20
this same problem.&nbsp; Wonder what is different.</DIV>
<DIV>&nbsp;</DIV>
<DIV>I know that I have put in a great amount of time and no small =
amount of=20
expense to correct it and it ain't happened.&nbsp; I gather from my=20
conversations with other builders that I am not alone in those =
categories.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Just thought I would share.............</DIV>
<DIV>&nbsp;</DIV>
<DIV>Jim Scales</DIV>
<DIV>Angel's Playmate</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV></BODY></HTML>

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