GRAUPNER mx-16 ifs Programming Manual Download Page 120

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120

Programming example: model helicopter

should be changed to a value which provides a reliable
idle.

Set-up note for electric helicopters:
Since the motor must be stopped completely if an emer-
gency occurs with an electric-powered model helicopter,
this setting can be adopted unchanged.

At present the remaining sub-menus are of no interest.
Simply switch “Auto-rotation” off, and move back to the
fi rst menu list.
Call up the set-up page of the “ch1

tail (rotor)” menu:

this is where you set static torque compensation (DMA)
for the tail rotor. Once again, please restrict yourself
to the three default reference points; everything else
is the preserve of the experienced pilot. For the initial
set-up – intended for a heading-lock gyro system – the
uniform pre-set values of 0% should be changed to
-30% at Point 1 (collective pitch minimum) and +30%
at the opposite end, Point 5 (collective pitch maximum),
although you may fi nd it necessary to adjust the settings
slightly later:

0%
0%

tail

ch1

input
output
point

normal

Now switch back to the auto-rotation phase for a mo-
ment. The set-up curve is disabled here, with the result
that the tail rotor servo no longer responds to collective
pitch commands (when the main rotor is not powered,
there is no torque to be corrected).
The – static – pre-set of the gyro effect principle (“nor-
mal” or “heading lock” mode), and also the gyro gain can

now be altered by setting a value other than “0” in the
“Gyro” line:

ch1
ch1

ptch

thro
tail

normal

gyro

SEL

inp8

Please be sure to read and observe the set-up instruc-
tions supplied with your gyro at this point, otherwise
there is always a possibility that your helicopter will be
uncontrollable!
If your gyro features gain control from the transmitter
– unlike the model we are using in this example – you
will need another free proportional control for it, e. g. the
INC / DEC button CTRL 5. This can be assigned to the
“Gyro” input in the …

»contr set.«

menu.

(page 60)

t r v

100%

SEL

SYM

ASY

c t r l 5

e m p t y

thr
gyr

e m p t y

Hold the button pressed forward; the beep sound will
rise steadily. When it falls silent, move to the

ASY

fi eld in

the “Travel” column using the rotary cylinder. Press the
rotary cylinder, and you will be able to set a maximum
gyro gain such as 50% in the now highlighted fi eld; this
represents a safe fi xed value which is maintained as
long as the button is at its forward end-stop. You will
probably need to adjust the value in the course of fl ight-
testing.

Additional notes on setting up gyros can be found on
page 81.

Further adjustments

If you have followed this programming example, you will
have a helicopter which is set up properly, and in an
ideal state for hovering practice and simple circuits. Of
course, you may wish to activate further functions de-
pending on your skill and fl ying experience. If you wish
to fl y using different rotor speeds and trim set-ups, you
will need to activate a series of “fl ight phases”, which
can be called up via switches which you assign. The fi rst
step in this process is to call up the …

»base sett.«

(page 50 … 54)

0:00

SEL

pitch min
clock

front

phase 2

hover

autorotat.

… menu, assign a switch to “Phase 2”, e. g. SW 2, and
enter a relevant name (if you wish).
It is important to be quite clear in your mind that auto-
rotation always has absolute priority over any other
phases. This simply means: if you operate the auto-ro-
tation switch, you immediately move to the auto-rotation
phase from either of the other two fl ight phases (“nor-
mal” phase and “phase 2”).
Now move back to the »

heli mixer

« menu, switch to

“Phase 2” (which you have just set up), and modify the
settings accordingly. Since the

-16iFS features digital

trims, in the Heli program all the trim positions for the
control functions “roll”, “pitch-axis” and “tail rotor” are
stored separately for each fl ight phase, in addition to the