Bedienungsanleitung Graupner MX-16 HoTT (Seite 179 von 200) (Englisch)

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Programming example: delta and ﬂying wing

Programming a model delta using the “normal” tail

setting

Alternatively, if you select the “normal” tail type in the

“Base settings” menu, and connect the servos to the

receiver as shown in the lower of the two receiver socket

sequence diagrams on the left-hand page, then the

aileron function of the two elevon servos will work cor-

rectly, but not the elevator function.

In the “normal” tail type you have to force the two ailer-

on servos and the two ﬂap servos to move in the same

direction and provide an elevator effect when an eleva-

tor command is given. This requires the “elev  NN *”

wing mixers, whose effect can be adjusted separately.

The procedure starts by selecting the …

“Fixed-wing mixers” menu (pages 108 … 113)

(The following settings are model-speciﬁc, and you

must check carefully that they work correctly on

your model before accepting them.)

+55%

+66%

+77%

–––

ail

diff aile.

rudd

flaps

brak

elev

flap

aile

elev

flap

aile

elev

flap

diff–red

aile

diff flaps

… where you set values other than zero for these mixers.

With this set-up the tailless model is considered to be a

range of wing mixers which the software makes avail-

able. If you select the “Delta / ﬂying wing” tail type, the

software automatically superimposes the elevator and

aileron functions. In this case the mixer ratios can be

adjusted by varying the Dual Rate settings in the “D/R /

Expo” menu (see page 102).

If you select “Delta / ﬂying wing”, all settings of the

“NN *  elev” wing mixers in the …

“Fixed-wing mixers” menu (pages 108 … 113)

–––

diff aile.

ail

rudd

brak elev

diff–red

… affect the elevator (up / down) function of the two

elevon (combined aileron / elevator) servos, as well as

the ﬂap / elevator servos.

Notes:

The flap mixers and flap differential only appear in •

the list if you have also entered “2fl” in the “aile/flap”

line at the “Delta / Flying wing” model type; see illus-

tration on the right.

In principle the same applies to the “Brake •  NN *”

mixers. These are also suppressed if you have de-

cided on “Throttle min forward / back” in the “motor at

C1” line of the “Base settings” menu.

Even if you have selected “2aile2fl”, the (digital) ele-•

vator and aileron trims only affect aileron / elevator. If

you wish to circumvent this, it is simpler to program

your model as described in the following section.

“normal” four-ﬂap wing (two ailerons and two ﬂaps), and

therefore has all the options associated with this wing

type. The method involves the “elev  NN *” mixers,

which were originally intended only for pitch trim com-

pensation and non-standard applications. In this case

they are “abused” by setting higher values than normal,

in order to transfer the elevator signal to the control

surfaces of the tailless model.

However, none of the ﬁxed-wing mixers includes the

digital trim of the elevator stick - so an alternative has to

be found.

Start by switching to the …

“Transmitter control settings” menu (page 94)

trv

+15%

+100%

ctrl 6

I8 +100%

+100%

free

ctrl 6

+15%

… and assign the same transmitter control to the inputs

5 and (if required) 6, e. g. the rotary proportional control

CTRL 6. Now move to the “Travel” column and reduce

the travel of the transmitter control for these two inputs

symmetrically to around 50%, or even less, because: the

lower this value, the ﬁner the trim control.

However, if you prefer to use the normal elevator trim

lever, set - or leave - the “elev  NN *” mixers to 0%,

and instead set up free linear mixers to do the job.

This is done by calling up the …

* NN = Nomen Nominandum (name to be stated)

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