User manual

315Programming examples - F3A model
»Stick mode« (page 114)
… menu, which is available as standard on the
mc-
20 HoTT transmitter only, and reduce the number of
trim steps in the “Tr” column appropriately:
Ch.1
Aile
Elev
Tr
+
time
4
2
2
0.0s
0.0s
0.0s
0.0s
Rudd
0.0s
0.0s
0.0s
0.0s
GL
PH
PH
PH
St
2
Note:
This option can be unlocked on the mc-16 HoTT
transmitter as an extra-cost option
It may also be necessary to assign appropriate oper-
ating elements and inputs for other model features,
e. g. retractable landing gear, fuel-mix, etc. Make
these assignments with the …
»Control adjust« (page 118)
… menu where a specific input can be assigned to an
operating element, for example, the landing gear can
be assigned to an ON/OFF switch on Input 6 and the
fuel-mix can be assigned to one of the proportional
sliders in the middle console, e. g. the side-mounted
left proportional slider to Input 7. However, since it
involves flight-phase independent settings, leave the
standard default “GL” in the “typ” column:
0%
0%
0%
–––
0%
–––
–––
–––
GL
GL
GL
GL
fr
Lv1
fr
SEL
In5
offset
In6
In7
In8
typ
3
The control travel of the operating elements must be
adapted and can also be reversed with a negative
travel setting.
Input
Output
Point
1
–50%
0%
0%
Ch1 curve
Curve
on
Only three interpolation points, “L” at -100 %, “H” at
+100 % and “1” at -50 % give the control travel the
rounded curve above.
Basic procedure:
• Move the C1 stick and, along with it the vertical
line in the graph display, toward idle to about -50 %
of control travel then briefly tap on the center SET
key of the right touch pad.
• In order to attain the curve shape shown, raise this
point with the selection keys to approx. 0 % in the
inverse video value field in the “Point” line.
• Finally, round the characteristic curve by moving
the marker frame upward, select with a brief tap
on the center SET key of the right touch pad then
change the value from “Off” to “On” with the selec-
tion keys.
If additional interpolation points between the left (“L”)
and right (“H”) end are necessary, repeat Steps 1 and
2 analogously.
Since F3A models normally have two aileron servos,
experience has shown that it is beneficial to move
both ailerons upward somewhat when landing. In the
process, the model usually approaches somewhat
slower and, above all, more steadily for the landing.
In order to do this it is necessary to program mixers
through the menu …
F3A models fly comparatively fast and thus react
“harshly” to the control movements of the servos.
However, since small control movements and cor-
rections are not optically perceptible, because this
results in inevitable point deductions in competition,
we recommend setting an exponential control char-
acteristic of the stick. For this purpose, switch to the
menu …
»Dual Rate / Expo« (page 130)
Experience has shown positive results with values of
approx. +30 % on the ailerons, elevator and rudders,
which you set in the right column with the selection
keys. In order to be able to control the F3A model to
run smoothly and cleanly:
+33%
+33%
+33%
Ail
Ele
Rud
EXPO
–––
–––
SEL
–––
(Some experts even use up to a +60 % exponential
ratio.)
Since (some) combustion motors do not react linearly
to movements of the throttle stick, through the menu
…
»Channel 1 curve« (page 138)
… a “bowed” or, in other words, non-linear throt-
tle curve can be set. Four-cycle motors with Roots
pumps, in particular, such as OS Max FS 120, require
a steep ascension of the curve in the lower speed
range. However, the corresponding values must be
adapted. The C1 control curve for the motor could
appear as follows: