GRAUPNER mx-20 Hott, Programming Manual

Page: 161 / 296

161 Detail program description - Control adjust
1
3
5
7
+
0%
0%
9
11
0%
0%
2
4
6
8
+
0 %
0%
0%
0%
10
12
0%
0%
+10 0 %
+100%
If this relatively simply variant should prove
impossible for whichever reasons, then the
alternative is a solution with two free mixers – and
potentially involving the
"MIX-only channel" menu
(see page 193).
In either case, however, the airbrake travels must
then be fi ne-tuned on the "
Servo adjustment " menu
(see page 90).
D.red. (Differential reduction)
Elevat cur ve
BRAKE SETTINGS
AILE
Crow
D.red 0%
0% 0% 0%
0% 0%
FLAP FLAP2
Earlier, we discussed the problems with the butterfl y
(crow) confi guration. Namely: that with the use of aileron
differential, the aileron effect can be strongly (negatively)
affected by the aileron elevation. This is fi rstly because
further defl ection of the one aileron upwards is
(almost) no longer possible and secondly because the
downward-defl ected aileron – depending on the elevation
and degree of differential confi gured – is often unable to
achieve even its "normal" position.
To be able to restore the effect of the aileron altered
in this way as far as possible, you should ensure that
you make use of the automated "Differential reduction"
feature. This feature continuously reduces the degree of
aileron differential as the airbrake system is extended.
The feature is confi gurable and can even be set to
suppress differential entirely.
A value of 0% means that the "aileron differential" set
at the transmitter remains fully in force. An entry that
equals the % value set for aileron differential means the
differential is fully eliminated once the butterfl y function
is at
maximum travel, i. e. with fl aps fully extended.
Setting a reduction value greater than the aileron
differential confi gured will eliminate the latter even
before the full travel of the airbrake joystick.
Values can be set in the range 0 to150%.
If you tap the

or

keys on the right touch
pad ( CLEAR ) at the same time, this will reset values
changed in the active (highlighted) fi eld back to 0%.
Elevat curve (Brake

elevator)
Elevat cur ve
BRAKE SETTINGS
Crow
D.red 0%
0% 0% 0%
0% 0%
If the airbrake control – to be set to 1, 7, 8 or 9 on the
"Brake Off" line of the "
Model type " menu (page 83) – is
used to extend the fl aps as described previously for the
"Brake settings" menu, this will often have a negative
effect on the aircraft model's airspeed. This mixer can
be used to compensate this type of effect by applying a
corrective value to the elevator.
By briefl y tapping the center SET key on the right touch
pad, you can switch to the display screen as shown below:
Input
Output
Point
?
–100%
0%
0%
Brake
nor mal
Ele
Cur ve off
Nor mal
Confi guration notes for "Elevat curve" (brake

EL)
The offset that you have confi gured on the " Model type "
menu (page 82) affects this mixer:
The vertical line on the display that indicates the
position of the airbrake control only moves from
the edge of the graph when the confi gured offset is
exceeded. Simultaneously, the airbrake control travel is
automatically expanded back to 100%, as described for
the "
Model type " menu.
Accordingly, the mixer's neutral point always lies on the
left edge, independently of the offset confi gured.
Now adjust the elevator curve in the direction of the
opposite end-point in accordance with the requirements.
Note that the approach taken to confi guring this 5-point
curve mixer follows the same principles as already
described (within the scope of the "Channel 1 curve"
menu, page
116 ) as applicable to the curve mixers, i. e.:
Input
Output
Point
1
–19%
–6%
–7%
Brake
Nor mal
EL
Cur ve on