GRAUPNER MC-22S, Programming Manual

Page: 88 / 180

88 Program description: Mixers
reduction”, which is explained in its own section later.
Elevator 3 6 fl ap
The fl aps can be used to enhance the effect of the
elevator in tight turns and aerobatics, and this mixer
feeds part of the elevator signal to the fl ap servos to
obtain this effect. The mixer direction must be set so
that the fl aps move down when up-elevator is applied,
and vice versa.
The “usual” settings for this mixer are in the low doub-
le-digit area.
( CLEAR = 0%.)
Elevator 3 5 aileron
This mixer allows the ailerons to reinforce the elevator
response in the same way as the previous mixer.
The “usual” settings for this mixer are in the low doub-
le-digit area.
( CLEAR = 0%.)
Flap 6 3 elevator
When camber-changing fl aps are deployed, whether
by an offset defi ned in the »
Control adjust « or using
a transmitter control assigned to “Input 6”, a side-ef-
fect may be an unwanted nose-up or nose-down trim
change. An alternative scenario may be that you wish
the model to fl y slightly faster than usual when the
fl aps are raised by a small amount. This mixer can be
used to solve both problems.
If this mixer is invoked, a corrective elevator defl ec-
tion automatically results when the fl aps are deploy-
ed. Naturally the value is user-variable, i.e. the achie-
ved effect varies only according to the magnitude of
the set corrective value.
The usual settings for this mixer are in the single-di-
git area.
( CLEAR = 0%.)
Flap 6 5 aileron
A variable proportion of the fl ap signal is mixed in
with the aileron channels 2 and 5 so that the ailerons
follow the movement of the fl aps, but normally with
a smaller defl ection. This provides more even lift dis-
tribution over the full wingspan. The ailerons move in
the same direction when the fl aps are raised or lowe-
red; usually travelling through a smaller angle.
This mixer is usually set up in such a way that the fl ap
travel of the ailerons is slightly lower than that of the
camber-changing fl aps.
( CLEAR = 0%.)
Differential reduction
The problem of reduced aileron response in the but-
terfl y confi guration has been mentioned earlier: if aile-
ron differential is employed, the aileron response may
be adversely affected through the extreme “up” de-
fl ection of the ailerons, which means that greater “up”
travel is (almost) impossible, and on the other hand
the down-travel of the ailerons is more or less “obst-
ructed” by the set differential. The net result is that ai-
leron response is signifi cantly reduced compared to
the normal position of the control surfaces.
In this case “Differential reduction” is the answer, as it
reduces the degree of aileron differential when you in-
voke the Butterfl y setting. Differential is reduced pro-
gressively, or even eliminated altogether, as the air-
brake stick is moved towards its end-point.
A value of 0% means that the full programmed “aile-
ron differential” is retained. A value the same as the
set percentage of the aileron differential means that
differential is completely eliminated when the butter-
fl y function is at its
maximum setting, i.e. fully deploy-
ed. If you set a value above 100% the aileron differen-
tial is eliminated even before full travel of the airbrake
stick is reached.