-------- Original Message --------
From: Jim Malach <jim@malach.com>


This is a request to find information regarding nose wheel shimmy on
landing a IV-P.

I finished my plane late in 2004 and have just 250 hours on it.

Six months ago I experienced my first shimmy, I attributed it to a bad
runway.

Six flights later at 100 hr. inspection I found that the engine mount
was cracked in two places.

I replaced the engine mount and other bent parts of the nose wheel
assembly. I did not rebuild the strut but inspected it after talking to
Scott at Lancair, It worked fine for the next 40 landings.

Yesterday after an additional 50 hours I had another high speed wobble
on a very good runway. (This happened after I was quite slow, maybe 50
knots, it lasted for 5 seconds, seemed like 5 mins.) My engine mount is
cracked in three places this time.

Am I the only one with this problem? What am I doing wrong?

If anyone else has had this problem how did you stop it from happening
in the future?

All help is appreciated.

Regards,

Jim Malach

jim@malach.com