Kas,
To what extent did you find this problem in the Spitfire 4 cylinder engines?
Joe (C)
"R. Kastner" wrote:
>
> Interesting info on the scattershields etc. Keep in mind that a lot of the
> action of losing flywheels etc is the harmonic vibration of the crankshaft.
> This is particularly true with the 6 cylinder TR's ( all 6's). The higher
> the revs the higher the chance of reaching an unacceptable harmonic
> vibration point. I went into this in detail several months ago. One of my
> tests on the dyno with a scope and sensors on each side of the flywheel at
> the outer edge showed that the flywheel was moving over .625" for and aft @
> 5800 revs thus actually prying the attachment bolts out of the end of the
> crank or stretching the bolts. This is why it is so important to have HARD
> bolts not just strong bolts as the attachment system. We also found that we
> would lose the clutch most of the time before the flywheel and my guess was
> that there are lots of small parts in the clutch to come loose, so one part
> comes loose and takes out the balance of the system. Perhaps this is not
> comforting but, this is what happens.
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