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a. Low travel end point of pitch servo: Adjsuted by “PITCH LOW TRIMMER”.
b. High travel end point of pitch servo: Adjusted by “PITCH HIGH TRIMMER”.
c. Hovering point of pitch servo: Adjusted by “HOVERING PITCH TRIMMER”.
d. Neutral point of pitch servo: Adjusted by “PITCH TRIM”.
E. Hovering throttle
The Focus heli-5 transmitter has a
hovering throttle fuction designed to adjust
the hovering point of the engine speed. It is
operated by “HOVERING THROTTLE
TRIM KNOB” on the top of the transmitter.
This fuction controls the “HOVERING
POINT” of the throttle sevo as below.
F. Revolution mixing
Revolution of main rotor generates a revers torque which causes the helicopter to
rotate in the opposite direction of the main rotor rotation. To compensate for this
torque, a certain amount of opposite rudder control must be applied according to the
power and pitch of the main rotor. THe Focus Heli-5 performs this fuction
automatically which is “REVOLUTION MIXING”.
To adjust the Rev-mixing you must first get the heli into a stable hover. Advance
the throttle and note if the nose of the heli turns left or right. By increasing or
decreasing the “Up mix” you will be able to add power without the nose turning. The
“Down mix” will be adjusted in the same way only from a high hover and will be done
by reducing power.
There are two trimmer settings, “UP” for ascending and “Down” for descending
flight. “UP” trimmer adjusts the amount of revolution mixing when the throttle stick
is in the high position and “DOWN” trimmer adjusts the amount of revolution mixing
when the throttle stick is in low postion.
(Note) The amount of “Revolution mixing” is related on “Pitch Curve High & Low”
setting.
fig 8
fig 9
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