GRAUPNER mx-12 Hott Programming Manual Download Page 191

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191

Programming example: model helicopter

ch1

ptch

thro

tail

normal

gyro

inp8

Please be sure to read and observe the set-up
instructions supplied with your gyro at this point,
as there is a possibility that your helicopter will be
uncontrollable if you set it up incorrectly!

If your gyro features gain control from the transmitter -
unlike the type we are using in this example - you will
need another free proportional control for it, e. g. CTRL
7. This can be assigned to the “Gyro” input in the …

“Transmitter control settings”

(page 96).

trv

free

ctrl 6

ctrl 7

thr

gyr

lim

+100% +100%

free

Turn the rotary control until its number (transmitter
control number) appears on the screen, then use the ar-
row button



of the left or right-hand touch-key to move

to the

ASY

field in the “Travel” column. Briefly press the

central

SET

button of the right-hand touch-key, and you

will be able to set a maximum gyro gain such as 50% in
the now highlighted field:

+100% +100%

+50% +50%

trv

free

ctrl 6

ctrl 7

thr

gyr

lim

free

This represents a safe fixed 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 flight-testing. Additional notes on setting up gyros can
be found on pages 118 / 119.

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 flying experience. If you wish
to fly using different rotor speeds and trim set-ups, you
will need to activate a series of “flight phases”, which
can be called up via switches which you assign. The first
step in this process is to call up the …

“Base settings”

(pages 82 … 90),

pitch min

rear

timer

10:01

phase 2

phase 3

hover

acro

autorotat.

–––

… 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 flight 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 flight phase, in addition to the
other menu settings which you entered separately for
each flight phase (see page 114).
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 86. You could assign the transmit-
ter control switch “G3” to this timer, by first activating
switch assignment and then turning the throttle limit con-
trol 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

With the stopwatch halted, touch the





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-