Sender: "Marvin Kaye" <marv@lancaironline.net>
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Date: Thu, 13 Jan 2005 08:41:29 -0500
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From: "Eskesen" <eskesen@dakotacom.net>
Subject: Rat Trap Springs
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Verrrry interesting !!!  I have something to add.

My slow build kit was received in late 94, first flown in early 2000.  The
rat trap springs were included.  I now have more than 500 hrs with no spring
problems.

At the time of the springs install, I noted that the ID of the spring coil
was considerably larger than the OD of the gear leg stand-off on to which it
was to be installed.  I also noted that the "hook" at the end of the spring
arm was wider than the over center piece that it was to be "hooked" over.
To ensure that the spring would not bind, and would not be subjected to
undesirable stress caused by poor alignment, I installed a filler over the
stand off (in my case a piece of old garden hose that is softer than the
spring and just happen to be appropriately sized).  This allowed the center
line of the spring coil to align (approximately) with the center line of the
stand off.  I then secured a shim (an appropriately thick piece of AL) to
the side of the over center link arm so that the "hook" properly aligned
with the link arm.  If you decide to do this I recommend that you do not
drill any holes in the link arm !

My gear has always dropped freely and locked in place in the hangar and in
the air.  I had occasion to use the emergency extension several times during
my first few flights and it has always worked just the way it should (no
side slipping necessary).

Byron Eskesen
LNC2  N8261E
Tucson, AZ