72
10X MANUAL Heli
72 MHz requires no special license to operate.
50/53 MHz requires the operator to have an FCC amateur
radio license (H
AM).
Low Band 72 MHz High Band 72 MHz 50MHz
Ch. No. Frequency
15 72.090
16 72.110
17 72.130
18 72.150
19 72.170
20 72.190
21 72.210
22 72.230
23 72.250
24 72.270
25 72.290
26 72.310
27 72.330
28 72.350
29 72.370
30 72.390
31 72.410
32 72.430
33 72.450
34 72.470
35 72.490
A gyro stabilizer, commonly referred to as a gyro or gyro sensor,
is used to sense the movement around a given axis and to apply
an opposite action to the appropriate servo. Most frequently, the
gyro is installed on the yaw or left and right axis to dampen the
twitchiness of the rudder (tail rotor).
You can use any manufacturer’s gyro with your JR radio system,
provided that the gyro is specified for use with a JR radio.
Although most helicopters are capable of flight without a gyro,
the gyro (if properly adjusted) prevents many frustrations and
crashes. This is especially true with novice helicopter pilots.
Note: A gyro cannot act. It can only react to a given situation.
In other words, it does not act as an autopilot to prevent situa-
tions that might occur. It can only correct for a current situation.
Installing the Gyro
Prior to installing the gyro, it is important that you familiarize
yourself with the manufacturer’s instructions.
When installing the gyro, never mount it directly to the frame of
your helicopter. Vibrations passing directly into the motor unit or
piezo sensor can drastically shorten the life of your gyro. Instead,
mount the gyro using at least two layers of thick double-sided
servo tape. This tape does not affect the gyro’s ability to sense
movement. It lessens the possibility of vibration damage to the
motor.
If you have a gyro with dual rates, such as the JR120BB gyro,
you can select a receiver channel for the second rate. Many pilots
use the auxiliary 3 rudder dual rate channel, so that as the rudder
dual rates are switched, the gyro sensitivity also switches. You
may prefer to use the auxiliary 2 or the gear switch, depending
on your flying style and personal choice. If you plan to install a
JR Piezo Gyro (NEJ-450, NEJ-3000), Code 44 Gyro Sensitivity
Adjustment function may be used in the AUX 3 channel. This
feature allows the gyro gain to be changed automatically with the
flight mode switch or independently with the AUX 3 switch.
After the gyro is installed in your helicopter, adjust the sensitivi-
ties, neutral point and tail rotor output direction for the gyro.
Note: The neutral point and tail rotor output directions should
all be performed per manufacturer’s direction and with the heli-
copter on the ground.
Flying with a gyro that is not functioning properly is worse than
flying with no gyro at all.
Frequency Chart
14
Ch.No. Frequency
36 72.510
37 72.530
38 72.550
39 72.570
40 72.590
41 72.610
42 72.630
43 72.650
44 72.670
45 72.690
46 72.710
47 72.730
48 72.750
49 72.770
50 72.790
51 72.810
52 72.830
53 72.850
54 72.870
55 72.890
56 72.910
57 72.930
58 72.950
59 72.970
60 72.990
Ch.No. Frequency
00 50.8000
01 50.820
02 50.840
03 50.860
04 50.880
05 50.900
06 50.920
07 50.940
08 50.960
09 50.980
Low Frequency 53 MHz
Ch. No. Frequency Flag Color
A1 53.100
Black/Brown
A2 53.200
Black/Red
A3 53.300
Black/Orange
A4 53.400
Black/Yellow
A5 53.500
Black/Green
High Frequency 53 MHz
Ch. No. Frequency Flag Color
A6 53.600
Black/Blue
A7 53.700
Black/Purple
A8 53.800
Black/Gray
Use of a Gyro
15
Note: JR Radios are not available on channels 11–14.
