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in this case, the range lies below 10 %, but can vary
from model to model. With the use of curve mixers,
the mix ratios can be adapted even more precisely
to the corresponding throw of the rudder. Again, no
values are indicated for this, because this would be
model-specific.
Vertical ascent and descent
Some models have a tendency to deviate from the
ideal line in vertical ascents and descents.
In order to compensate for this, it is necessary to
have a centre position of the elevator dependent on
the throttle stick position. If, for example, the model
begins to hold off on its own in the vertical descent
with a throttled motor, some elevator must be mixed
in at this throttle position.
For this purpose, program a free mixer "C1 Elev".
The corresponding mixer values are normally under
5 % and must also be tested in flight.
Turning away over the longitudinal axis in idle
If the throttle is reduced, the model may begin to turn
away over the longitudinal axis in idle. This can be
counteracted with the aileron.
However, the more elegant solution is to correct this
effect with a free mixer "C1 Ail".
The input values here are usually very low (approx. 3 %)
and the settings should be made in calm weather. It of-
ten suffices to only use the mixer between half throttle
and idle. Therefore program the mixer asymmetrically,
if applicable.
Turning away with the ailerons/landing flaps
extended
If you move the ailerons upward for the landing, the
result is often a turning away over the longitudinal
axis due to various servo paths of the aileron servos
or due to design precisions. Therefore, the model be-
gins to automatically hang the left or right wing. This
is also easy to compensate for with a mixer "C1
AIL" depending on the position of the
ailerons/landing flaps.
The mixer must be switched on and off with the same
switch with which you can switch the aileron/landing
flap function on and off (see previous page). There-
fore, it only works with the aileron/landing flap func-
tion activated. The appropriate value must be tested
in flight.
One additional comment regarding ...
"FAIL-SAFE setting"
You utilize the safety potential of this option
by programming at least the motor throttle
position for combustion models to idle and the
motor function for electrically powered models to stop
for a Fail-Safe case. If interference should occur, the
model is then less likely to fly off on its own and
cause damage to property or even personal injury. If
you additionally program the fail-safe positions of the
rudders to that the model flies in gently sinking circles
in the event of a failure, there is a good chance that
the model even lands relatively gently on its own in
the event of a continuing connection failure. You also
have sufficient time to re-establish the connection if
the entire 2.4 GHz frequency band is temporarily
disrupted.
In the receiver's condition as supplied, however, the
servos maintain their last validly recognized position
("hold") in the event of a fail-safe situation. As described
on page 224, you can define a "Fail-safe position" for
each receiver servo output (Fail-safe mode).
Summary
The settings described on this page are especially
useful for the "expert" who would like to have an
entirely neutral, precisely flying F3A model acrobatic
model at his or her disposal.
It should be mentioned this takes a lot of time, effort,
instinct and know-how. Experts even program dur-
ing the flight. To do this, however, is not suggested
for an advanced beginner who ventures into an F3A
acrobatic model. It would be best to turn to an expe-
rienced pilot and carry out the settings step by step
until the model has the desired neutrality in its flight
behavior. Then the pilot can begin to learn the not
always easy to perform acrobatic figures with a model
which flies faultlessly.
Programming examples - F3A model
327
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