F3A Model - GRAUPNER mc-32 Programming Manual

F3A model

F3A models are a part of the group of motor-driven
winged models. They are powered by a combustion
or electric motor. Models with electric motors can be
used in both the electric acrobatic class F5A and are
also competitive in the international model acrobatic
class F3A.
The basic comments and notices for the mechanical
installation of a remote steering system, which was
already referred to in the fi rst programming example
on page 268, also applies, of course, for F3A models
and does not need to be mentioned here again.
Faultlessly constructed F3A models exhibit a largely
neutral fl ying behavior. Ideally, they react with a good
nature but precisely to control movements without the
individual fl ight axes infl uencing one another.
F3A models are controlled with ailerons, elevator
and rudders. Normally, each aileron is actuated
by a separate 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 previously described winged models.
The additional "Retractable landing gear" function is
to be provided on one of the auxiliary channels 6 to
9. It is best to actuate the landing gear with a switch
without center position. In addition, another mix offset
for the carburetor can – if necessary – be provided.
You normally use one of the two proportional
controls on the transmitter, which actuates one of the
unassigned auxiliary channels.
304 Programming examples - F3A model
SUMO / SUMI-connection
free or aux. function
free or aux. function
Receiver power supply
free or aux. function
free or aux. function
free or aux. function
Receiver power supply
free or aux. function
free or 2nd elevator or aux. function
free or fuel mixture or aux. function
Receiver power supply
Telemetry connection
free or aux. function
free or aux. function
Receiver power supply
free or landing gear or aux. function
Right aileron
Rudder
Receiver power supply
Elevator or 1st elevator
Aileron or left aileron
Throttle servo or speed controller (electric motor)
Receiver power supply
With the assignment of auxiliary channels at the
transmitter, we recommend making sure that the
operating elements required for this are easily
within reach, because during fl ight – especially in
competition – you have "very little time" to release the
joystick.
Programming procedure
Since the basic programming of the transmitter was
already described in detail on pages 268 ... 275, only
F3A-specifi c tips are added here.
In the menu ...
»Servo adjustment«
Servo 1 0% 100% 100%
Servo 2 0% 100% 100%
Servo 3 0% 100% 100%
Servo 4 100% 100%
0%
Servo 5 0% 100% 100%
Rev cent. – travel +
... the settings for the servos are carried out.
Experience has shown that working with at least
100 % servo throw is benefi cial, because the control
precision is signifi cantly 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 center should be adjusted
mechanically, insofar as possible.
Any corrections can be made on the software side in
the third column during the initial test fl ights.
Through the menu ...
"Model type"
... the idle trim is activated for Channel 1 (normally
"rear", because full throttle is "front"). The trimming
then only works in the idle direction:
M O D E L T Y P E
Motor on C1
Tail type
Aileron/camber flaps
Brake Offset +100%
The remaining settings are made or left as shown in
the fi gure.
(page 102)
150% 150%
150% 150%
150% 150%
150% 150%
150% 150%
– limit +
(page 94)
Thr. min rear
Nor mal
1 AIL
Input 1
SEL