Trio Gyro
#. 720616
Norbert Grüntjens
www.ikarus.net
Trio Gyro
#. 720616
Norbert Grüntjens
Trio Gyro
This innovative gyro system will allow you to stabilize your model airplane
on all three axes (roll, yaw and pitch). To keep you in control at all times, the
gyro functions may be changed via remote control. You may operate the
Trio Gyro with one or two wing servos. The Trio Gyro has an automatic
fade-out feature, i.e. the gyro's control support is strongest when the stick is
kept in neutral position and decreases continuously with the stick being
moved further out to either side. You can adjust the sensitivity of the gyro
using an auxiliary channel on your transmitter; with another auxiliary
channel you may switch the three gyros on or off.
Technical specifications:
Operating voltage
: +3.5V to +12 V
Weight
: 59 g (2.1 oz)
Size
: approx. 50x39x19mm (1.0 x 1.5 x 0.7in.)
Temperature range : -10 to +50 degree C (14 to 122 degree Frank)
Transmitter requirements:
Min. 6 channel PPM Transmitter/Receiver
Diagram
Install the Trio Gyro according the above shown schematic into your model,
but do not mount it permanently, yet! Protect the gyro against vibration and
temperature variations (as usually happens close to engines) and keep
sufficient distance to the receiver.
Connections and adjustments
Connect the gyro cables according to the above diagram to the respective
receiver connectors. Plug the servo cables into the respective gyro
connectors.
If you want to use only one aileron servo, use only Aileron 1 and leave
Aileron 2 unused (coil up the unused lead to avoid confusion).
Connect the gyro cable “Sensitivity Aileron” to a receiver output which is
activated on the transmitter by a proportional slider. Do the same with the
“Switch Channel”. This channel should be activated on the transmitter by a
3-step switch or proportional slider.
After switching on the radio system, the gyro will go through an automatic
If the gyro was not exactly in neutral position during set up adjustments,
the adjustment may not be entirely correct. This may become obvious,
when the servos are out of center when adjusting the servo sensitivity by
remote control. In this case repeat the adjustment procedure by briefly
switching off the gyro. This problem may also occur under extreme
temperature variations.
100%
Sensitivity
0%
2.0 ms
Impulse
length
1.0ms
2.0 ms
Impulse
length
1.0ms
Step 3
Step 2
Step 1
Standard sensitivity
for Aileron 1 and 2
Elevator
Rudder
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self adjustment process for about 5 to 7 seconds. After the successful
adjustment the LED will go on. During this period the gyro should not be
moved until the LED lights up.
Now the gyro has to be mounted and adjusted to provide the correct gyro
effect (compensation of external wind influence). Otherwise you will loose
control over your model airplane fast.
First adjust the aileron function (directional activity of the gyro). It may be
necessary to turn the gyro 180 degrees around its yaw axis; but still do not
permanently mount the gyro, yet. Move the slider (lever) from the switch
channel on your transmitter to activate the aileron gyro and make sure that
one aileron moves up and the other down when moving the aileron stick on
your transmitter out of its center position.
Now move the gyro along its roll axis. The gyro reactions should result in
an aileron deflection (one aileron moves up, the other one down).
If there is no aileron effect (both ailerons move up or down together), you
will have to reverse the aileron function on the Dip Switch, and briefly
switch off and on the gyro. Now check the directional activity of the aileron
gyro (moving the model along its roll axis in one direction should result in a
counter deflection of the ailerons caused by the aileron gyro). If the gyro is
not counter acting, please
turn the gyro 180 degrees along its yaw axis.
Now connect the elevator and rudder servos to the gyro. Here, too, check
for the
correct reaction of the gyro and if necessary use the Dip Switch of this
function to reverse it.
The Dip Switch SW4 doubles the gyro sensitivity for the rudder. But in this
case this channel operates without fade-out feature, which should not
cause any trouble, as the servo throw is still sufficient.
Attention:
after each activation of the Dip Switches SW-1 to SW-4 the gyro
needs to be switched off and than on again.
Use of the slider/step switch
Slider step 1:In this position all gyros are switched off, e.g. there is no gyro
effect. Control movement at the transmitter sticks are resulting in
proportional rudder throws.
Slider step 2:Elevator and aileron gyros are activated. The gyro effect of the
aileron gyro can be adjusted by remote control via the “Sensitivity Aileron”
slider between 0% and 100% of the maximum value pre-adjusted at the
gyro's “Standard Sensitivity of aileron 1 and 2” potentiometer.
Slider step 3:All 3 gyros are activated. The gyro effect of the aileron gyro
can be adjusted by remote control via the “Sensitivity Aileron” slider
between 0% and 100% of the maximum value pre-adjusted at the gyro's
“Standard Sensitivity of aileron 1 and 2” potentiometer.
+
+
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Control LED
Servo Connections for
Aileron 1
Aileron 2
Elevator
Rudder
Dip Switches for:
SW4 Rudder sensitivity
SW3 Reverse Rudder
SW2 Reverse Elevator
SW1 Reverse Aileron
Receiver connection for
Switch Channel (3 step)
Sensitivity Aileron
Aileron 1
Aileron 2
Elevator
Rudder
Schematic for Gyro installation in a model airplane
Pitch axis/elevator
Roll axis/
aileron
Yaw axis/rudder
Opposite aileron deflection due to Aileron deflection caused by the gyro
induced input via the transmitte rdue to rotational movement of the plane
stick along the roll axis in the direction of the
arrow.
Sensitivity
Aileron
Switch/Slider Channel
