RPX Technologies DynaVibe Classic, Руководство пользователя

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15
Guide to Dynamic Balancing V1.09
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Balance / Analysis
Clock the Prop and Change Weight
Confirm that the ignitions are off and mixture is full lean. Rotate the propeller
carefully until the small light at the back of the optical pickup comes on. This
is the 0° position relative to the accelerometer. The angle indicated by the
DynaVibe is the angle where the prop assembly is heavy.
The angle is measured from the zero position of the accelerometer to the
indicated angle in the direction of propeller rotation.
When the heavy point is identified, remove weight from this point. If there is
no weight to remove from the heavy location, add weight on the opposite side
of the propeller (indicated angle +/-180°).
For instance, if the system is displaying 0.25IPS @ 90°, this is the position of
excess weight. If there are no extra washers to remove from the spinner, then
weight must be added to the opposite side (270°, 90°+180°). A typical O-320
installation with fixed pitch prop and spinner may require two to four AN970
washers to correct this type of vibration.
Every installation is different due to the weight of the engine, propeller,
spinner, etc. Therefore, adding weight should be done in small increments
and by making notes on the datasheet, the step-by-step correction gives you an
indication of future changes.
A good starting point is 50 grams / IPS.
CAUTION:
Verify ignition and fuel are off
prior to moving propeller