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Programming examples - F3A model
F3A model
You normally use one of the two proportional controls
on the transmitter, which actuates one of the unas-
signed auxiliary channels.
Receiver power supply
Free or aux. function
Free or aux. function
Rudder
Aileron or left aileron
Elevator or 1st elevator
Free or 2nd elevator or aux. function
Receiver power supply
Airbrake or throttle servo
or speed controller (electric motor)
Right aileron
Free or aux. function (retracts)
Free or aux. function (mixture)
Free or aux. function
Free or aux. function
With the assignment of auxiliary channels at the trans-
mitter, we recommend making sure that the operating
elements required for this are easily within reach, be-
cause during flight – especially in competition – you have
“very little time” to release the stick.
Programming procedure
Since the basic programming of the transmitter was
already described in detail on pages 280 … 288,
only F3A-specific tips are added here.
In the menu …
»Servo adjustment« (page 106)
S1
S2
S3
Rev cent
+
trv
0%
0%
0%
100%
100%
100%
100%
100%
100%
0%
0%
100%
100%
100%
100%
S4
S5
… the settings for the servos are carried out. Experi-
ence has shown that working with at least 100 %
servo throw is beneficial, because the control preci-
sion is significantly better if greater servo travel is used.
This should already be taken into account during the
construction of the model in the design of the rudder
linkages. Check the servo’s direction of rotation. The
servo centre should be adjusted mechanically, insofar
as possible.
Any corrections can be made on the software side in
the third column during the initial test flights.
Through the menu …
»Model type« (page 98)
… the idle trim is activated for Channel 1 (normally
“back”, because full throttle is “front”). The trimming
then only works in the idle direction:
Tail type
Motor at C1
Normal
Aile/flaps
2AIL
Model type
Brake Off In 1+100%
SEL
back
The remaining settings are made or left as shown in the
figure.
After the model is test-own and trimmed, we
recommend reducing trim travel for the elevator and
ailerons. The model has significantly less of a reaction
to a movement of the trim lever. “Over-trimming” can
be avoided, because with full trim travel, under certain
circumstances, the movement by just one trimming
step can have too strong of an effect: Therefore, the
model which previously pulled slightly to the left, hangs
somewhat to the right after the trimming. Go, if you
have a transmitter
mc-20 HoTT, in its menu …
F3A models are a part of the group of motor-driven
winged models. They are powered by a combustion
or electric motor. Electric-powered model aircraft are
now becoming prevalent in the international F3A model
aerobatic class as well as being eligible for the F5A
electric aerobatic class.
The basic comments and notices for the mechanical
installation of a remote controlling system, which was
already referred to in the first programming example
on page 278, also applies, of course, for F3A mo dels
and does not need to be mentioned here again.
Faultlessly constructed F3A models exhibit a largely
neutral flying behavior. Ideally, they react with a good
nature but precisely to control movements without the
individual flight axes influencing one another.
F3A models are controlled with ailerons, elevator and
rudders. Normally, each aileron is actuated by a sepa-
rate servo. There is also the regulation of the drive
output of the motor (throttle function) and a retractable
landing gear in many cases. The assignment of the
channels 1 to 5, therefore, do not differ from the previ-
ously described winged models.
The additional “Retractable landing gear” function is
to be provided on one of the auxiliary channels 6 to 8
or 6 … 12. It is best to actuate the landing gear with
a switch without central position. In addition, another
mix offset for the carburettor can – if necessary – be
provided.
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