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rotor: The leading edge of the tail rotor blades should now move to the left; if not, rever
se the tail rotor servo at the transmitter.
· Check the direction of operation of the gyro (REV switch). Swing the tail boom to the right:
the leading edge of the tail rotor blades should now move to the left. If not, operate the
„REV" switch on the 3-D gyro. Note: if you use the „REV" switch on the gyro the change
will not take effect until you switch the gyro off and then on again. All stated directions are
as seen from the tail of the model looking forward.
You can now adjust the sensitivity (gain) of the gyro from the transmitter. Slider 5 provides
proportional control over the range 0 - 100%.
Note: In contrast to previous gyro systems, any reduction in the gain of the 3-D gyro simul-
taneously reduces servo travel, since lower gyro sensitivity calls for less tail rotor travel in
order to obtain the same control response. The gyro also features an exponential control
characteristic curve. Values below 30% are not of practical usefulness and should not be
set in any case because they would reduce the tail rotor control travel to a dangerous
extent.
For initial familiarisation flights with the new gyro we suggest the following basic set-
tings:
Tail rotor servo travel (ATV):
Gyro gain (ATV):
4.2. Connecting and setting up the 3-D gyro for „Heading Hold" mode with gain
adjustment from the transmitter
As already described, the gyro very effectively maintains the helicopter's tail boom position
when in Heading Hold mode. The new mode offers the following advantages:
· The beginner now has the chance to concentrate completely on the other basic functions
of the helicopter, because the tail always stays in the same position.
· When practising cross-wind flying the tail rotor requires no control commands. The model
flies on a stable heading, with none of the usual weathercocking effect, i.e. the tail boom
has no tendency to turn under the influence of the wind. Admittedly this also means that,
in order to fly straight ahead, it is now necessary to use a slight stick deflection to place
the helicopter on the desired heading.
· This mode is ideal for the 3D style of flying which has been gaining ground steadily over
the past few years, since the tail does not need to be controlled separately when the heli
copter is flying backwards. Once set, the helicopter's directional heading is maintained
very effectively.
Important:
· The 3-D gyro detects and corrects the tiniest of deviations, which means that it does not
require assistance from a collective pitch -> tail rotor mixer (Revo-Mix). We recommend
that you switch this mixer off.
· Conventional gyro systems usually feature electronic gyro suppression (Gyro-Sens.-
Mixer) which allows the model to fly high-speed pirouettes. This is not required with the
3D-gyro, since the sensor signal is always over-ridden by any stick command. The extent
to which it is over-ridden is determined by the servo travel setting (ATV). For this reason
the suppression mixer (Gyro-Sens.) must always be switched out of circuit when the 3-D
gyro is in use.
· For the same reasons all the other mixer functions which affect the tail rotor (e.g. swash
plate -> tail rotor mixer) should also be switched off.
3D GYRO english
approx. 70%
approx. 70%
14
No.
8065
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