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Jim,
I had a very bad shimmy when I started
doing my first taxi tests. I had someone watch me taxi while braking to
see what was moving and he said my right main was shaking like a wet dog. I
pulled the rotor and had it checked by Robby Grove himself. He found the
rotor off slightly less than the .015" you had and said he seriously
doubted that it was the cause of the problem. He resurfaced it anyway and
the problem disappeared - for awhile. Since that time five years ago, I've
resurfaced my rotors once more and replaced one altogether. Each time the
problem lessened, but eventually came back, lending credence to the argument
that the rotors warp slightly over time. The shimmy I have now is nowhere
near as bad as that first one I had, though it's possible that by my conditioned
response of relaxing the brakes when it starts, I preventing it from getting any
worse.
Skip Slater
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