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33
Do not connect the flight battery to the speed controller
until you have switched on the transmitter and move
the throttle stick or switch to the “Motor Stopped”
position.
Switch on the transmitter, connect the flight battery to the
speed controller, and the controller to the receiver. With
this model you must use a controller with what is known
as a BEC circuit (receiver power supply from the flight
battery).
Now switch the motor on briefly, and check once more the
direction of rotation of the propeller. Hold the model firmly
when you run the motor, and remove any loose lightweight
objects from the area behind the model before the propeller
does the job for you.
Caution: even small motors and propellers represent
a distinct injury hazard!
27. Setting the control surface travels
It is important to set the control surface travels correctly,
as these settings have a crucial influence on the model’s
overall control response. In all cases the travels are
measured at the point of maximum chord (width of control
surface.
Elevator
up - stick back - approx. + 11 mm
down - stick forward - approx. - 11 mm
Rudder
left and right - approx. 6-10 mm
each way
Ailerons
up - approx. + 7 mm
down - approx. - 3 mm
MagicMixer #1 (optional) # 7 3000
The MagicMixer #1 permits the use of a simple radio control
transmitter without mixer functions. It is adequate for:
MINI MAG 3-channel RC transmitter
Without the MagicMixer #1 you will need at least a four-
channel computer transmitter with mixer functions.
Using this module the Mini Mag can be flown even with a
transmitter such as the Ranger III, as supplied with the
EasyStar and SpaceScooter RTF models.
It provides a means of controlling
two aileron servos and
the rudder from a single channel (right / left output) at the
receiver.
The servos, and therefore the control surface travels, are
automatically actuated with the correct deflections. Using
the MagicMixer #1 the degree to which the rudder follows
the ailerons (“combi-switch” / CAR function) and the aileron
differential are fixed, i.e. they cannot be altered.
Aileron differential means that the up-aileron travel is greater
than the down-aileron travel. This helps to prevent the model
swinging away from the turn (adverse yaw) when ailerons
are applied.
If you are using the MagicMixer #1 your transmitter must
offer at least the following channels:
Channel 1: Ailerons, coupled rudder (3 servos)
Channel 2: Elevator (1 servo)
Channel 3: Throttle (1 servo)
Connect the aileron servo leads as described in the
“MagicMixer #1” instructions. Take care to maintain
correct polarity when making these connections: the signal
pin is indicated on the label of the MagicMixer with the
square signal symbol. The signal wire in the servo lead is
generally yellow or orange.
Connections at the MagicMixer #1:
r/l = to receiver, right / left output
AR = to right aileron servo
AL = to left aileron servo
R = to rudder servo
If necessary, set the correct direction of servo travel using
the servo reverse facility on your transmitter.
Y-lead for the aileron servos (optional)# 8 5030
The Y-lead permits the use of a simple four-channel radio
control transmitter, i.e. without mixer functions. The two
aileron servos are actuated simultaneously by a single
receiver servo output.
Please note: in this case the differential aileron movement
must be obtained by mechanical means. This is achieved
by offsetting the servo output arms forward by two splines.
This must be done before you install the servos. The rudder
is controlled via a separate channel with this arrangement.
Computer radio control transmitter
If you have this type of transmitter you need neither a
MagicMixer #1 nor a Y-lead.
The transmitter must feature the following adjustment
facilities:
- Aileron differential mixer
- Servo reverse
- Servo travel adjustment
- Optional combi-switch (coupled rudder / ailerons)
Note: when you apply a right-aileron command at the
transmitter, the right-hand aileron (as seen from the
tail) must deflect up.
If you find that you cannot set the correct control
surface travels with your radio control system, you
will need to change the linkage hole to which the
pushrod is connected.
28. Gilding the lily
The kit includes a multi-colour decal sheet. Cut out the
individual name placards and emblems and apply them to
the model, either following our scheme (kit box illustration)
or using your own arrangement. If you have built the rudder
/ elevator version of the model, you will find decals on the
sheet designed for covering the servo recesses in the wing.