GRAUPNER MC-22S, Programming Manual

Page: 123 / 180

123
Tail : “Normal”, “V-tail”, “Delta / fl ying wing” or
“2 EL Sv 3 + 8”
Ailerons / fl aps: 1 or 2 aileron servos and 0, 1 or 2
fl ap servos
Brake : Airbrake servo control via Ch1 stick or
(optionally) using a transmitter control
connected to input 8 or 9 (»
Control ad-
just « menu).
As we wish to operate the airbrake servo at output 1
using the Ch1 stick, we leave the setting under “Bra-
ke” at “Input 1”. The only change you need to make
here is to move the mixer neutral point to the position
at which the airbrakes are retracted; this is carried out
via “Offset”. If the offset is not located right at the end
of the control travel, the remaining travel is a “dead
zone”, i.e. it no longer affects any mixers. However,
this is only signifi cant if you later use one of the three
mixers “Brake
NN”, in the » Wing mixers « menu.
At this juncture – if not before – you should check that
the servos are connected to the receiver in the stan-
dard
Graupner sequence:
Note:
If you set up a V-tail, but the “up / down” and / or “left /
right” functions work the wrong way round, please re-
fer to the table in the right-hand column of page 35.
The same procedure can be used if you set up fl ape-
rons (superimposed ailerons and fl aps) and they work
the wrong way round.
7
6
5
4
3
2
1
8/Ba
tt.
izer-MICRO-SUPERHET
1 6
FM
Best.-Nr.
7052
Kanal 60-282/182-191
as 35MHz/35MHz-B-Band
Made in Malaysia
S C A N
! #
Battery
Y-lead, Order No. 3936.11 or 3936.32
Auxiliary function
Right fl ap servo
Flap servo or left fl ap servo
Right aileron servo
Rudder servo or V-tail
Elevator servo or V-tail
Aileron servo or left aileron servo
Airbrakes or throttle / speed controller
(electric motor)
The following settings apply to a model with a “nor-
mal” tail; if your model has a V-tail, the settings can
be accepted virtually unchanged. However, if the mo-
del is a delta or fl ying wing the situation is not quite
so simple. You will fi nd a special programming examp-
le covering this model type on page 138.
»Servo adjustment« (page 56)
S e r v o 1 = > 0 % 1 0 0 % 1 0 0 % 1 5 0 % 1 5 0 %
S e r v o 2 = > 0 % 1 0 0 % 1 0 0 % 1 5 0 % 1 5 0 %
S e r v o 3 = > 0 % 1 0 0 % 1 0 0 % 1 5 0 % 1 5 0 %
S e r v o 4 = > 0 % 1 0 0 % 1 0 0 % 1 5 0 % 1 5 0 %
R e v c e n t . - t r a v e l + - l i m i t +
S E L S E L S Y M A S Y S Y M A S Y
t
In this menu you can set various parameters rela-
ting to the servos, i.e. “
Direction of rotation ”, “ Neu-
tral setting ”, “ Servo travel ” and “ Travel limit ” (maxi-
mum permitted servo travel) to suit the requirements
of the model.
By “requirements” we mean adjustments to servo
centre and servo travel which are needed to compen-
sate for minor tolerances in servos and
slight inaccu-
racies on the model.
Note:
The facilities provided in this menu for setting asym-
metrical servo travels are not intended for setting dif-
ferential travel on ailerons and / or camber-chan-
ging fl aps. There are functions designed specifi cal-
ly for this in the »
Wing mixers « menu; for a V-tail the
» Dual mixer « menu should be used.
In the last column “ Travel limit ” – the basic settings
of 150% in each case should be reduced signifi cant-
ly, since the values stated here act virtually as “limit-
ers”. This setting defi nes the point on the servo’s tra-
vel beyond which it is not permitted to move, and is
designed to prevent the servo striking its mechanical
end-stop and stalling (drawing a heavy current). The
deciding factor for this value is therefore the end of
the mechanical movement available at the servo, con-
trol surface and / or linkage.
As an example of this we will consider a model with a
standard (cruciform, “cross”) tail in which the rudder
moves in a wedge-shaped cut-out in the elevator. The
rudder must not defl ect to the point where it fouls the
elevator, as this could jam it, and it is usual practice to
adjust the pushrod travel mechanically so that at full
stick defl ection the rudder has slight clearance to the
elevator at both extremes of travel. Provided that the
rudder is controlled solely by its dedicated stick, this
system presents no further problems. However, if you
set up a mixer which also affects the rudder, i.e. you
add an additional signal to the normal rudder signal
(e.g. an “aileron
rudder” mixer), the cumulative ef-
fect of the two signals may be excessive, and the rud-
der may yet foul the elevator. Setting the travel limit
correctly in this menu will reliably prevent the rudder
defl ecting too far. However, take care not to set the
travel limit at too low a value, as this would place an
excessive restriction on the rudder defl ection.
When you have completed the settings to this point, a
fi xed-wing model – either powered or glider – will be
ready to fl y in its basic form; note that for a powered
model you must also defi ne the correct idle stick posi-
tion in the »
Model type « menu.
However, there are no “refi nements” in this set-up,
and it is the refi nements which will give you more
long-term pleasure in your fl ying. Assuming that you
are already capable of fl ying your model safely, it is
time to get a taste of these extra facilities; to this end
we now move on to the menu ...
Programming examples – Fixed-wing models