User manual

321Programming examples - Helicopter models
menu …
»Servo adjustment« (page 112)
S1
S2
S3
Rev cent
+
trv
0%
0%
0%
100%
100%
100%
100%
100%
100%
0%
0%
100%
100%
100%
100%
S4
S5
This menu can also be used to adapt travel and
direction for individual servos. However, one must
attempt to retain 100 % servo travel so as to achieve
the best possible resolution and control accuracy. The
direction of travel is determined with “Rev.” and, in the
process, make sure that the direction is correct. The
tail rotor servo must run so that the nose (!) of the
helicopter follows the tail stick direction.
In the following menu, which is available as standard
on the
mc-20 HoTT transmitter only, but can be
unlocked on the mc-16 HoTT transmitter as an
extra-cost option …
»Stick mode« (page 116)
Thr.
Roll
Nick
Tr
+
time
4
4
4
0.0s
0.0s
0.0s
4
0.0s
Tail
0.0s
0.0s
0.0s
0.0s
TL
PH
PH
PH
St
… the column “Tr” is used to set the increment size of
each “click” on the digital trim keys.
The C1 trimming only affects the throttle servo for
the helicopter. At this point there is no need to go into
the particulars of this trimming (“cut-off trim”) once
again. Please read more about this on page 70.
(Thanks to digital trimming, trim values can be saved
automatically when a model change is affected. In the
mc-16 HoTT and mc-20 HoTT systems these
can even be stored automatically when a change of
flight phase takes place.)
An additional setting which is specific to helicopters
can also be made in this menu in which you deter-
mine which function the trim lever on the pitch stick
should have. This is accomplished by selecting the
“TL” setting in the “Thr(ottle)” line or leaving it as it is.
This roughly corresponds to trim for the familiar idle
trim function. If the trim indicator marker is moved all
the way forward by “turning” the trim lever (remember:
“pitch min rear” = “throttle forward”) the throttle limit
will later take over the throttle limit for throttle enable
seamlessly in the menu …
»Control adjust« (beginning on page 122)
In5
offset
Thro
Gyro
Lim.
–––
–––
–––
Lv2
0%
0%
0%
0%
GL
GL
GL
GL
typ
fr
fr
fr
–––
SEL
… where input “Lim.” is assigned and all other inputs
are “fr(ee)” by default.
This “Lim.” input serves as the throttle limiter. Its
effect is exclusively on output “6”, where the throttle
servo is connected. The throttle limiter is assigned by
default to the right-side proportional rotary control.
Once again, as a reminder:
• With the use of the “throttle limiter” function, you
do not have to program a flight phase “throttle pre-
selection”.
• The throttle limiter does not control the throttle
servo; it only limits the travel of the throttle servo
in the full throttle direction according to its position.
The throttle servo is generally controlled from the
pitch stick via »Helicopter mixer« menu setting/s
for throttle curve/s, which is why input 6 must ab-
solutely remain “free”. Refer to pages beginning on
page 191 in this manual about this.
• The C1 trimming also affects only the throttle ser-
vo for the helicopter. At this point there is no need
to go into the particulars of this trimming once
again. Please read more about this on page 70.
(Thanks to the digital trimming, trim can be auto-
matically saved values with a model changeover
as well as with a change of the flight phase).
• A detailed description of the idle run base setup
model and the adjustment of idle and throttle limit
can be found beginning on page 127.
Then switch to the “travel” column with the  selec-
tion key of the left or right touch pad and increase
the now inversely highlighted value from +100 % to
+125 % with a fully opened throttle limiter with a brief
tap on the center SET key of the right touch pad:
– travel +
+100%
+100%
+100%
In11
Lim.
+100%
+100%
+100%
+100%
+125%
In9
In10
In doing so, it is assured that the throttle limiter re-
leases the entire throttle travel with the pitch stick
later during flight.
Adjustment notice for electric helicopters:
Since electric drive systems have no need for an
idle setting, the basic configuration of settings for an
electrically-powered helicopter merely involves ma-
king sure that the control range of the throttle limiter
is both higher and lower than the adjustment range of
the speed controller (usually -100 % to +100 %) by a
safe margin. If necessary, therefore, the adjustment
of the “travel” setting of the throttle limiter described
above must be modified accordingly, for example, to
symmetric +110 %. The further adjustment, however,
can take place analogously to the combustion heli-
copter described here.