Reely SKY Jet Ranger Notice D'emploi page 107

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Connecting the gyro
Connect the gyro (3) to the 3-pole connecting cable
(2) on the receiver output for the tail servo.
Brown = negative
Red = positive
Orange = pulse
Connect the 1-pin adjustment input (yellow = pulse)
of the gyro (1) with a free channel of the receiver
which is controlled with a slide control via the
transmitter.
What connections have to be used on the receiver depends on the remote control and
is described in the respective documentation.
The tail rotor servo (14) is connected directly to the three pin contacts (5) of the gyro. Make sure the
polarity of the servo plug (17) is correct. The pulse line of the servo cable (yellow, white or orange,
depending on the servo manufacturer) must point upwards (also see illustration 2).
Caution!
If the gyro is connected as described above, it works in dual mode. The adjustment of
gyro sensitivity and mode selection ("standard" or "head lock") is done by the transmitter.
If the 1-pin adjustment input of the gyro (1) is not connected, the gyro works in single
mode. Gyro sensitivity is set via the "GAIN" control dial on the gyro (see illustration 1, pos.
10) and the gyro works in "head lock" mode only.
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Operating the gyro
Before you operate the gyro for the first time, any tail mixers programmed in the transmitter (e.g.
revolution mixing or gyro suppression mixer) have to be deactivated.
The gyro is not equipped with a power switch. Power supply is provided by the receiver via the 3-
pin plug connection. As soon as the receiver is switched on, the gyro is in operation.
The tail function control stick and the corresponding trim must be in centre position before you
operate the receiver and the gyro. The tail rotor should then be aligned so that the helicopter has
no tendency to turn to the side (factory settings) when hovering.
a) Selecting the servo (only with order no. 20 64 85)
In order to fully exploit the precision of this gyro, use
a high-quality, high-speed, top-class servo. As a rule,
you should use a digital servo, which can be controlled
a lot faster than conventional analogue servos. In
order to use high-quality analogue servos with this
gyro, the gyro is equipped with a servo selection
switch.
The servo selection switch (18) is the upper micro
switch at the right hand side of the gyro.
If the servo selection switch is set to "DS", only digital
servos may be connected to the gyro.
Important information!
If analogue servos are connected when the switch is in this position, they may be
damaged by the high control frequency.
When using analogue servos, the servo selection switch must be set to "STD".
Caution!
As the trims and the control dials on this gyro are very small, you should make
adjustments very carefully using a small screw driver only.
b) Initialisation of the gyro
The gyro must be initialised to function properly. This
internal calibration is carried out automatically after
switching on the receiver and takes approx. 2-3
seconds.
During this time, the model and the gyro must not be
moved or turned. After successful completion of the
initialisation, the LED (9) lights up.
The LED flashes after initialisation if there is no
control signal from the receiver. In this case, the
receiver must be switched off. Resolve the problem
and switch the gyro on again.
1
3
2
ATV
GAIN
SET
17
14
Illustration 4
18
ATV
GAIN
SET
Illustration 5
9
ATV
GAIN
SET
Illustration 6
c) Setting gyro sensitivity using the transmitter (dual mode)
The best way to set gyro sensitivity between 0 - 100% is using a slider (on the transmitter). At 0%
the stabilising effect of the gyro is deactivated and at 100% the highest gyro sensitivity is achieved.
Now even minimal direction changes of the gyro are sufficient to generate big corrective throws at
the servo.
The slider on the transmitter sets gyro sensitivity and
the operating mode. For this reason, the central
position of the slider (50%) corresponds to 0% gyro
sensitivity.
Depending on the steering direction on the transmitter,
the sensitivity of the gyro is increased in "normal"
mode or "head lock" mode. The two end positions of
the slider (0% or 100%) represent maximum gyro
sensitivity of 100%.
At a position between 0 - 50% the gyro is in "normal"
mode, between 50 - 100% the gyro is in "head lock"
mode.
Instead of the slider, a toggle switch can be used to select the operating mode. In this case the
required set values must be programmed in the ATV menu (transmitter control settings).
In connection with a flight mode switch you can programme individual gyro sensitivity values for
hovering flight, sightseeing flight and artistic flight.
To check whether the gyro is in the correct mode according to the slider setting, switch
on the transmitter first. Then switch on the receiver with gyro and connected servo. The
slider on the transmitter should be set so that the gyro is at about 75% sensitivity in
"normal" mode. The slider is at approx. 12.5%.
If you use an electric model helicopter, disconnect the engine from the regulator in order
to prevent uncontrolled start-up of the rotors.
If the tail of the model helicopter is quickly turned to the side now, the servo has to perform a turning.
If the servo lever returns to centre position (neural position) immediately after every manual turning
movement, the gyro is in "normal" mode.
If the servo lever only returns to centre position (neutral position) when the tail was turned back to
the original position, the gyro is in "head lock" mode. In this case, change the functional direction
of the slider in the reverse menu of the transmitter.
Important information!
If - in "head lock" more - the servo lever is pushed all the way in one direction, the
transmitter trim (sub-trim) must be set so that the servo lever is roughly stable in centre
position or only runs very slowly when pushed all the way.
Our recommendation:
The necessary gyro sensitivity setting for the first flight greatly depends on the model and the servo
used. The higher the quality of the connected servo and the faster its speed, the greater the
maximum gyro sensitivity. For the first flight you should set a sensitivity value of approx. 75%.
d) Setting gyro sensitivity (single mode)
Gyro sensitivity in single mode is set via the "GAIN"
control dial (10) on the gyro.
Use a suitable screwdriver.
If the control dial is turned all the way to the left, gyro
sensitivity is 0%.
If the control dial is turned all the way to the right, gyro
sensitivity is 100 %.
The "GAIN" control dial is only active in single mode. If the receiver connection for gyro
sensitivity is connected to the receiver in dual mode and receives control signals, the
"GAIN" control dial is inactive.
e) Checking the servo direction
The rotational direction of the tail servo lever depends
on the model helicopter type and the rotational
direction of the tail rotor (small arrow).
If the control stick for the tail function is moved to the
left on the transmitter, the tail servo must control the
tail rotor so that the tail is turned to the right and the
fuselage end to the left as seen from above (illustration
9 A).
If the control stick for the tail function is moved to the left on the transmitter, the tail servo must control
the tail rotor so that the tail is turned to the left and the fuselage end to the right as seen from above
(illustration 9 B).
If the tail servo responds exactly opposite to illustration 9, the rotational direction of the tail servo
on the transmitter has to be changed (reverse function).
For easier understanding, the inclination of the tail rotor necessary to balance the main
rotor torque has not been taken into account in illustration 9.
100%
100% 100%
50%
50%
50%
0%
50%
0%
LINEAR
100%
0%
Illustration 7
10
ATV
GAIN
SET
Illustration 8
A B
Illustration 9