Chapter 5 – General Operation
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5. From the balance point on the chart, plot parallel to the fine
lines that extend from the heavy borders to the edges of the
chart.
6. Read the adjustment to the rotor from the scale and notation
on the heavy borders.
5.5.4.2
Counter-Clockwise Rotors
Finish balancing counter-clockwise-turning rotors, as follows:
1. Obtain a reading from the Vibrex unit’s screen displays.
2. Obtain the correct paper polar chart for use with the subject
tail rotor. The user may use a manufacturer’s chart from the
maintenance manual or one supplied from Honeywell.
3. Using the blue (counter-clockwise) side of the Rotor
Protractor, align the photocell on the protractor with the
azimuth of the photocell on the helicopter.
4. Plot the balance point from the Vibrex unit onto the chart,
using the clock numbering on the Rotor Protractor aligned,
as in step 4 on the chart. For an explanation of how to use
the Rotor Protractor, see Section 5.5.3 “Using the Rotor
Protractor”.
5. From the balance point on the chart, plot parallel to the fine
lines that extend from the heavy borders to the edges of the
chart.
6. Read the adjustment to the rotor from the scale and notation
on the heavy borders.
NOTE: It is possible on some rotors to use the Propeller
Balance screens and their propeller balance procedures
(using the Propeller Protractor) for determining correct
balance weights, instead of a polar chart. The Propeller
Balance screens’ menus are especially suited to tail rotors
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