GRAUPNER mc-16 Programming Manual page 210

Subsequent aero-tow flying has proven that you al-
ways have to fly with the up-elevator held slightly in
during the tow. The solution will be to set up a mix-
er that applies slight up-elevator trim to the ele vator
servo connected to receiver output 3 when the ae-
ro-tow release is closed. The screen-shot will be fa-
miliar from page 202: here, the fourth linear mix-
er has been set up for this function, with the switch
channel "S" as mixer input: Move the selected
switch to the OFF position and then switch ...
M1 6 EL
M2 C1 EL
M3 Tr 3 8
M4 S EL
M5 ?? ??
ty fr to
... to the mixer configuration page.
Here select STO under "Offset" then tap the centre
SET key of the right four-way button briefly ... de-
pending on the selected travel setting in the »Con-
trol adjust« menu and the switch setting, the offset
value will jump to +X % or -X %, for example:
L.Mix 4 S
Mix input
0% 0%
Offset
+100%
STO SET
Now use the Select button  of the left or right-
hand four-way button to move to the line below
"Mix input". Select SYM if appropriate, then press
the central SET button of the right-hand four-way
button. The value fields are now highlighted.
210 Program description - Free mixers
After you have moved the selected switch to the
mixer ON position, use the selection keys on the
right four-way button to set the required symmetri-
cal mixer ratio, for example:
4
2. If a multi- flap wing featuring a "crow or butter-
C4
fly system" with (additional) airbrakes is intended,
and this brake system is to be tested with and with-
2
out airbrakes, then move to the »Mix-only chan-
nel« menu, see page 212. This menu is available
as standard on the
Simply set Channel 1 to "MIX-only" ...
EL
... and follow this by programming a free mixer "C1
 C1" to restore control over the airbrakes via ser-
vo 1. If you also assign a switch to this mixer, then
you will be able to switch this mixer on and off as
you please.
3. The final example applies to model helicopters:
L.Mix 1 6 EL
Mix input
+10% +10%
Offset
+100%
SYM
ASY
mc-20 HoTT transmitter only.
MIX-only channel
only
normal
1 2 3 4 5 6
In the helicopter program, if you wish affect pitch
trim with a proportional control, e. g. one of the slid-
er controls in the middle of the console, then assign
one of these controls to this function in the »Con-
trol adjust« menu; for example the "In9" input.
(However, leave the default value of "GL" in the
"Type" column as it is so this configuration, analo-
gous to the free mixer yet to be programmed, will
be applicable globally for all flight phases.). Finally,
simply define a LinearMIX "9  1" with a symmetric
mixer ratio of, for example, 25 %. Due to the internal
coupling, this transmitter control then acts equally
on all of the model's collective pitch servos without
affecting the throttle servo.
L.Mix 1 9 1
Mix input
+25% +25%
Offset
0%
SYM ASY
However, you should also de-couple the assigned
transmitter control from control channel 9, so that
any servo which may be connected to receiver out-
put 9 can no longer be operated by this transmit-
ter control. This is accomplished in the »Mix-only
channel« menu, see page 212, which is available
as standard on the mc-20 HoTT transmitter only.