Blueskies wrote:
x-y-z accelerometers 'in a box' attached to the engine; pick up RPM; feed it all into an excel sheet then plot the
results. It does not need to be very expensive to be effective...

I'm listening, Blueskies, if you'd like to explain a little further.
I'm real good at following directions.

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----Because I can----
http://www.ernest.isa-geek.org/
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