Gen II
User Manual
4-18 – Propeller Balance
Chapter 4
Revision 2.2, Apr 2020
If you selected “Uneven” in paragraph 4.1.1.4.3 – Multiple angle/hole number
fields are displayed. Each hole number (“No.”) is automatically populated and its
corresponding angle must be defined individually. Using the keypad, complete
each field by entering an angular (“Ang”) location as measured opposite the
direction of propeller rotation. Use the [
] and [
] keys to move between these
fields. To determine these values, do the following:
With mag switches OFF, rotate the propeller so the tachometer triggering
device (magnetic interrupter, reflective tape, etc.) is at top dead center.
With the propeller in this position, use the 12:00 position as the “0” or
“360 degrees” (index point) and measure opposite the direction of rotation
to the angle of each hole number and record that angle adjacent to the hole
number. (See the example “Prop Hole Layout Setup” screen shown at the
beginning of the section.) For example, if the number 1 hole is near the
6:00 position, the angle may be measured as 174 degrees.
On the screen, use the keypad to enter the angle of hole number 1 as “174”
per the example. Then, using the [
] key to move to the adjacent field
(“No.”), input the number “1.”
Next, measure to hole # 2. If hole #2 is measured as 156 degrees, enter
that value and “2” in the adjacent field. Continue this process until all
angles for all holes are defined.
The phase angle measurement must
always be made with values INCREASING opposite the direction of
rotation of the propeller regardless of the hole numbering direction
.
4.1.1.4.7.
When all fields are complete, press [OK] to accept the settings and continue. If
you have selected a two (2) engine balance, the Prop Hole Layout Setup screen
will be displayed for engine #2. Repeat steps 4.1.1.4.1 through 4.1.1.4.6. Press
