User's Manual

163
Programming example: F3A model
stick mode
motor at C1
1
tail type normal
cut off +150%–100% 1
aile/flap 2aile
idle re.
The remaining settings should be adjusted as required
to suit y
our personal preferences.
You may fi nd it necessary to assign transmitter controls
to particular inputs to operate the retractable undercar-
riage or carburettor mixture adjustment. This is carried
out in the …
“Transmitter control settings” menu (page 74).
For example, you may like to assign a particular trans-
mitter control - perhaps one of the two rotary proportion-
al knobs - e. g. CTRL 7 - for mixture adjustment, or the
ON / OFF switch SW 3 for the retracts, to the input “E6”:
I5
I6
+
trv
free
3
+100%
+100%
+100%
+100%
The retracts are extended and retracted when you oper-
ate the s
witch “SW 3”. You may need to adjust the travel
of the transmitter control, and perhaps reverse that
channel by setting a negative prefi x for servo travel.
F3A models fl y fairly fast, and respond very “solidly” to
corrective movements of the servos. However, in com-
petition fl ying it is vital that all abrupt control movements
and corrections should be kept to a minimum, as the
A little down-elevator must usually be mixed in to ensure
that the aeroplane does not climb when the ailerons /
fl aps are deployed.
To meet these requirements you need the two mixers
shown in the illustration below.
typ fro
to
M1
M2
M3
c1
el
c1
??
5
??
6
6
The mixers are activated using one and the same ex-
ternal switch, e. g. “SW 6”, which therefore has to be as-
signed to both mixers, with the same direction of effect.
Press the central SET button of the right-hand four-way
b
utton to move to the mixer inputs on the second screen
page, and set the appropriate mixer ratios. In both cases
the mixer neutral point should be left at the centre posi-
tion of the Ch 1 stick travel.
For this reason you should now move the Ch 1 stick to
the Idle range, select the ASY fi eld, and enter the follow-
ing values:
MIX 1: -60% … -80% and
MIX 2: -5% … -10%.
Example of MIX 1:
MIX1 c1 5
trv
0%
0%offs
SYM
ASY
–66%
judges will invariably notice any lack of smoothness and
dock a few points, so it is advisable to set exponential
control characteristics on the stick functions.
Move to the …
“D/R Expo” menu (page 82).
Exponential values of around +30% on aileron, elevator
and rudder have proved to be a good starting point, and
you can set them in the right-hand column of this menu.
These values provide smooth, well-defi ned control of
the typical F3A model. Many experts use higher values;
even up to +60% exponential.
100%
100%
100%
+33%
+33%
aile
elev
rudd
DUAL EXPO
–––
–––
–––
+33%
Since F3A models generally have two aileron servos, it
has pro
ved useful to defl ect both ailerons “up” slightly for
the landing. In most cases this causes the model to fl y a
little more slowly and with a more stable attitude on the
landing approach.
To achieve this you will need to program mixers in the …
“Free mixers” menu (section starting on page 106).
Both ailerons are usually required to defl ect “up” as a
landing aid, in parallel with the movement of the throttle
stick, but only from the half-throttle setting in the direc-
tion of idle. From that point on, the further the stick is
moved towards the idle position, the more the ailerons
defl ect up. The reverse occurs when you open the
throttle: the ailerons are returned to neutral to avoid the
model suddenly ballooning up.
33112_mx12_HoTT_2_GB.indd Abs46:16333112_mx12_HoTT_2_GB.indd Abs46:163 06.06.2011 19:39:4706.06.2011 19:39:47