Futaba G501 - Manual (Page 4)

Adjustment during flight
•Precautions before fliaht
Since the piezoelectric gyro uses a angular ac-
celeration command control system, the rudder
has an excellent effect despite the high gain.
If hovering was performed at 100% dual rate (rudder) in
the past, reduce it to about 80%. When you want to per-
form a fast spin, use 100%. Since the rudder is very ef-
fective near the neutral position, exponential use (40 to
60% for hovering, 60 to 80% for forward flight)
Set rudder trim, rudder offset, and revolution mixing rate
to about 1/3 of their normal value. Start rudder offset
from neutral.
Sensitivity adjustment points
The suitable sensitivity depends on the fuselage, tail rotor,
tail drive shaft, servo, and servo horn. However, when start-
ing adjustment, start with the following value as the set
value standard.
Sensitivity setting for hovering: 70 to 80%
Sensitivity setting for forward flight and aerobatics:
40 to 50%
'Adjust the sensitivity within the range at which hunting
does not occur when moved during hovering.
*lf the aircraft was suddenly stopped during operation at a
high angular acceleration, hunting may occur. Adjust the
sensitivity so that hunting does not occur over the neces-
sary operating range.
*For forward flight, adjust the sensitivity within the range at
which does not occur hunting.
Trim adjustment
If the trim changes, use the fuselage rod to adjust the trim to
near the neutral position.
Revolution mixing adjustment
Make the mixing amount small. If the mixing amount is
large, control is in the reverse direction. (About 1/3 of nor-
mal)
Rudder steering angle adjustment
Perform left and right pirouette. If the left and right rotation
speeds are different, reduce the high side by rudder ATV
function.
(Operating precautions)
• Do not move the aircraft for four or five seconds after turn-
ing on the gyro power (shared with receiver). Since initial-
ization is automatically performed inside the gyro immedi-
ately after the power is turned on, if the aircraft is moved at
that time, the neutral position may change. In this case, turn
on the power again.
• If the gyro remains in the static state for a long time, the
neutral position may change. In this case, correct it by turn-
ing on the power again.
• Avoid sudden temperature changes. Sudden temperature
changes will cause the neutral position to change. For ex-
ample, in the winter, do not fly immediately after removing
the model from inside a heated car and in the summer, do
not fly immediately after removing the model from inside an
air conditioned car. Allow the model to stand for about 10
minutes and turn on the power after the temperature inside
the gyro has stabilized. Also, if the gyro is exposed to direct
sunlight or is mounted near the engine, the temperature
may change suddenly. Take suitable measures so that the
gyro is not exposed to direct sunlight, etc.
•Since the transmitter rudder channel is operated as the
angular acceleration command, do not adjust the rudder
channel throw (ATV function) when the aircraft is static. Use
ATV function to adjust the rudder effect.
• When the aircraft is static, a dead zone is created in trans-
mitter stick operation. However, this is done to protect the
linkage and to restrict the servo output.
•Check the remaining receiver and gyro servo nicd battery
operating time during the adjustment stage and decide how
many flights are remaining.
(Fuselage maintenance precautions)
•The rigidity of the fuselage tail has a large effect on gyro
performance. Therefore, proper maintenance from the be-
ginning is essential for ultimate performance.
• Fuselage vibration also has an adverse affect on gyro op-
eration. Make the fuselage vibration as small as possible.
Gyro FP-G501
Power supply voltage: 4.8V (shared with receiver)
Current drain: 35mA (at 4.8V)
Dimensions: (Gyro) 1.18x1.18x1.22in (30x30x31mm)
(Control amp) 2.40x1.50x0.63in (61x38x16mm)
(Control box) 1.30x0.91x0.51 in (33x23x13mm)
Weight: 2.47oz (70g)
Servo FP-S9203
Control system: Pulse width control
Power supply voltage: 4.8V (shared with receiver)
Output torque: 76.4oz-in (5.5kg-cm) (at 4.8V)
Operating speed: 0.11sec/60 deg (at 4.8V)
Dimensions: 1.59x0.79x1.48in (40.5x20x37.5mm)
Weight: 1.87oz(53g)
Before requesting repair, please refer to this instruction manual
again and verify your settings. If you are still experiencing
trouble, please request service as follows:
Address
Your nearest Futaba dealer.
Repair information
Describe the trouble in as much detail as possible.
1) Symptom: Including the state of the set when the trouble
occurred.
2) Digital proportional set used: Transmitter, receiver, and
servo model numbers.
3) Fuselage: Fuselage name and mounting conditions.
4) Your name, address, and telephone number.
Warranty contents
Read the warranty card supplied with your set.
*The warranty contents differ with geographic locations.
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