User's Manual

169
Programming example: model helicopter
+
+100%
+100%
+100%
+100%
+100%
+100%
+100%
+100%
+50% +50%
trv
free
free
ctrl 6
ctrl 7
I5
thr
gyr
I8
lim
free
This represents a safe fi xed value which is maintained
as long as the rotary control is at its right-hand 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 pages 98 / 99.
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 …
“Basic model settings” menu (pages 64 … 71),
pitch min rear
timer 10:01 C3
phase 2
phase 3
hover
acro
autorotat.
2
–––
8
… assign a switch to “Phase 2”, e. g. SW 8, and enter a
relevant name (if you wish).
It is important to be quite clear in your mind that auto-
rotation always has absolute precedence over any
other phases. This simply means: if you operate the
auto-rotation switch, you immediately move to the auto-
rotation phase from either of the other two fl ight phases
(“normal” phase and “phase 2”).
Now move back to the “Helimix” menu, switch to “Phase
2” (which you have just set up), and modify the settings
accordingly. Since the mx-16 HoTT 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
other menu settings which you entered separately for
each fl ight phase (see page 94).
For example, if the motor run is limited by the fueltank
size or battery capacity, you should set the stopwatch
to count down. Enter the maximum possible motor
run time, e. g. “5 min.”. The transmitter’s sounder now
starts emitting warning sounds starting at “30 s” before
“zero”, as described on page 67 / 68. You could assign
the transmitter control switch “G3” to this timer, by fi rst
activating switch assignment and then turning the throt-
tle limit control from its idle position in the direction of
full-throttle:
rotor direct
swashplate
right
3sv(2rol)
cut off –100% +150%
1
pitch min
rear
timer
5:00 C3
With the stopwatch halted, touch the cd or ef but-
tons of the left-hand touch-key (CLEAR) simultaneously
at the basic display, so that the stopwatch switches to
the “Timer” function. The timer then starts automatically
when you move the throttle limit slider towards full-
throttle, and stops again when you move the limiter back
to the idle range.
Suggested refi nement: speed governor
At some time you may wish to install a speed governor
(regulator) in your helicopter, e. g. the mc-Heli-Control,
to try fl ying with a system rotational speed which is
automatically maintained at a constant value. It makes
sense to couple the individual rotor speeds with the
fl ight phases, as this enables you to carry out further
fi ne-tuning.
The initial requirement when programming the transmit-
ter is to install and program the speed governor exactly
in accordance with the manufacturer’s instructions. Of
course, the mx-16 HoTT provides further facilities to
allow you to implement different rotational speeds in the
individual fl ight phases. A practical suggestion, which
includes the throttle limiter function, can be found in the
section starting on page 97.
If you have set up your helicopter as described in this
programming example, you will fi nd that it is capable
of carrying out extremely challenging fl ight tasks even
though it is not suitable for competition work.
We suggest that you should not make use of additional
functions until your model is fl ying perfectly, so that you
will be in a position to recognise and appreciate any
improvements. Whenever possible, it is always best to
implement additional refi nements one at a time, other-
wise you won’t know which change has brought about
any improvement. Bear in mind that the good pilot is
not recognised by the number of complex functions with
which he can cope, but by the results he can obtain
when fl ying a relatively simple set-up.