Coupers: I don't have shimmey in my Alon. I did in a Cesssna which has similar linkages. All components of the steering system have to be tighter than you think. Grasp the nosewheel with both hands and try to "steer" it. Watch the linkage for any movement. If you can move the wheel at all, even a 1/16" at the tire, it is too much. Possibly: (1) Some component is worn out. (2) Something is assembled incorrectly. (3) Shiming of a joint is required.
If holding steering pressure stops the shimmey, this suggests a loose
component. Tire pressure doesn't seem to be very critical in my 'coupe.
The book says 17psi in the nosewheel.
Grasp the tire top and bottom and try to move it. Any movement at all
suggests a worn wheel bearing or bad axle component.
David Smoler
Alon A-35
N6359V
At 09:10 AM 9/1/98 -0400, Jerry Eichenberger wrote:
>We had the same problem last Jan. when we got our coupe. It shimmied
only
after landing, during rollout, well below landing speed, and steering to
the right stopped the shimmy.
>We cured it be replacing the bolt in the scissors. If this doesn't work
for you, see if the bolt hole has elongated so that the bolt doesn't make
a
tight fit. If all else is OK, that may be the problem. Generally, if a
tire is out of balance, the problem should be worse as speed increases,
not
as it decreases as was the case with our plane. We too have the dual
fork.
>Jerry Eichenberger
>Columbus, Ohio
>N2906H
>
>>>> Jim <[EMAIL PROTECTED]> 09/01/98 08:12AM >>>
>I too have the shimmey problem and at times it is quite violent. I
>disagree that the problem is landing speed though as my shimmey happens
>at generally 40 to 45, well below landing or any flying speed. I will
>concede that the balance may be off as I have not balanced it. The only
>way I found to stop the shimmey is to steer slightly right just after it
>happens and it goes away. You are correct that it seems to happen at
>only one general speed.
>I also thought it might have to do with a general looseness in the
>steering linkage from control wheel to nose wheel. What do ya think?
>Jim Powell
>N99068 S/N 1691
>Midland, MI
>
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