Aircraft Adjustments - FUTABA FP-8SSHP Instruction Manual

AIRCRAFT ADJUSTMENTS

•Revolution Mixing Compensation Ad-
justment
When high speed level flight is performed with a heli-
copter, the tail rotor reverse torque required is small,
however the high side revolution mixing amount is
large, the fuselage will veer to the right. The power
loss by the tail rotor becomes large. (Opposite when
the main rotor rotates counterclockwise.)
If only the mix amount "up side" is reduced at the
high side about 70% of the throttle stick at this time,
maneuverability also improves and the power loss is
also reduced.
Rudder servo
1 . Fly in level flight at full speed.
2 When the speed does not increase at high speed
flying, or when the helicopter swings to the right,
when the speed does
helicopter rises vertically,
mixing amount is probably excessive.
3 Adjust the compensation setting amount with
trimmer [16] and set it so that the revolution mixing
amount is reduced at throttle lever maximum.
4 The compensation setting amount should normally
be about 3 ~ 4 of Fig. 60 for fuselage system
and 4 ~ 5 tor frame system.
5 Fly at full speed again to adjust the trimmer [16]
maximum for highest acceleration at high speed
and vertical moving up.
6 Since the set value depends on the diameter and
shape of the tail rotor, adjust repeatedly for maxi-
mum linearity and power.
Fig. 60
not increase while the
etc., the revolution
•IDLE UP 1 ADJUSTMENT
1 Hover and check the throttle lever hovering posi-
tion.
2 Stop the engine, set the throttle lever to the hover-
ing position, and set the idle up 1
division 10 (maximum). Adjust the idle up point
up and down with trimmer [9] of the throttle
trimmers [C] on the trimmer panel at the transmit-
ter. Make this adjustment so that the throttle servo
does not operate when switch [19] is turned ON and
OFF. Idle up is maximum at this point.
3 When the idle up 1 switch [19] is set to ON, the
throttle servo operates up to the position set at the
idle up 1 knob [20] .
4 Set the idle up 1 knob [20] to 0, start the engine,
and set the throttle lever to maximum slow.
5 Next, set switch [19] to ON and turn knob [20] slowly
clockwise. While slowly accelerating the engine, set
the rotor speed to the same speed as when hover-
ing.
6 With this setting, the change in the main rotor and
tail rotor speed from t a k e o f f to hovering is small,
the change in the effect of the rate gyro and servos
is also small, and aerobatics are extremely easy.
Throttle servo
The idle up amount can
be set within this range
with knob [20].
knob [20] to
25
Idle up point
can be set with
trimmer [9].
Fig. 61