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Old 02-10-2018, 03:44 AM   #5 (permalink)
Andy from Sandy
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Join Date: Dec 2006
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To check for vibration use the vibration analyser on the bench.

Remove main blades and unclip tail push rod before spooling up.

The tail should self center.

If you get a peak you should be able to convert the frequency to an rpm to work out the offending area. A frequency of 150Hz = 9000rpm pointing to the tail.
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