11
Attach the rudder 10 to the fin using the hinges 22.
Fig. 30
13. Connecting the servos to the elevator and rudder
If you are using servos other than those recommended, you may
need to use different linkage holes - adjust as necessary.
Connect the pre-formed end of the rudder pushrod to the
outermost hole in the servo output arm. The swivel connector
should be mounted in the third hole from the outside of the horn
in the rudder 10. Tighten the nut of the pushrod connector just to
the point where the barrel swivels smoothly, but without slop.
Apply a tiny drop of thread-lock fluid or cyano to the outside of the
nut to secure it.
Repeat the procedure with the elevator pushrod 30.
Fig. 31
14. Installing the motor
If you are using the dedicated power set # 33 2638 you will have
no problems at this stage: everything fits, and the model is very
adequately powered. The method of installing the motor mount
32 and the motor is shown in Fig. 32.
15. Centre of Gravity
The CG should be corrected as far as possible when you install
the flight battery.
The model should balance at a point in the range 110 - 120 mm
aft of the wing root leading edge, measured on both sides of the
fuselage. Fig. 33
16. Initial test-run
Install all the receiving system components as shown in Fig. 34,
and connect them as described in the RC system instructions;
use the Velcro tape 20 + 21 to secure the components. Check
the neutral position and freedom of movement of the control
surfaces, and the direction of rotation of the servos. Check the
direction of motor rotation, and reverse it if necessary.
17. Settings (guide only!)
Centre of Gravity (CG): approx. 110 - 120 mm
aft of the wing root leading edge
Longitudinal dihedral: 0°
Downthrust: 0 - 2° (motor shaft angled down)
Sidethrust: 0 - 2° (motor shaft angled to the right)
Adjustments are possible using the set-screws in the motor
bulkhead.
Control surface travels:
Measured at the widest point of the control surfaces
Ailerons: 65 mm
Elevator: 65 mm
Rudder: 90 mm
Dual Rates on elevator and ailerons: 30 - 50%
Exponential: ailerons 30%, elevator 50%
18. Test-flying
Wait for a day with flat-calm conditions or very little wind.
Carry out all adjustments beforehand, in the calm of your
workshop!
Longitudinal dihedral = 0°. The design of the model automatically
sets this correctly.
Balancing:
Start by balancing the model within the stated range. Once you
have completed the initial test-flights, you can fine-tune the setting
as follows: fly straight and level at half-throttle, and roll the model
inverted. If you now have to apply a great deal of “down” to hold
level flight, the model is nose-heavy; the CG must be shifted
further aft. If the machine climbs whilst inverted, without requiring
elevator correction, the CG is too far aft. When balanced correctly,
the model will require slight down-elevator for level inverted flight.
Correcting straight and level flight:
First the static balance: support the model by the spinner and
the rudder: with the fuselage level, the wings should remain
horizontal. If not, add ballast to the lighter wingtip.
On the next flight, fly the aeroplane at minimum throttle (just
enough power to keep the model in the air), hold it straight and
level, and adjust the trims for straight flight. Now switch to inverted
and check the straight flying characteristics. If necessary, adjust
the wingtip ballast after landing the model.
Sidethrust:
Apply full throttle and fly the model straight and level past yourself
before pulling up into a vertical climb. When ascending vertically
the model should not exhibit any tendency to veer off to right or
left. If this is not the case, adjust the sidethrust to correct the
fault. Repeat the test several times, as any sidewind will tend to
falsify the model’s track.
Downthrust:
Apply full throttle and fly the model straight and level until it arrives
at your location, so that you have a clear view of the model from
one side. Pull the aircraft up into a vertical climb: it should
continue to climb vertically, and not fall away forward or back. If
this is not the case, adjust the motor downthrust to correct the
fault.
After these checks you may find it necessary to repeat the CG
tests.
Aileron differential:
Fly three or four rolls to the right at half-throttle; if the aircraft veers
to the right during this manoeuvre, you need to increase the
aileron differential. If it veers to the left, i.e. against the direction
of rolling, you should reduce the aileron differential.
19. Gilding the lily - applying the decals
The kit is supplied with a multi-colour decal sheet 2. Cut out the
individual name placards and emblems and apply them to the
model in the position shown in the kit box illustration, or in an
arrangement which you find pleasing.
20. Safety
Safety is the First Commandment when flying any model aircraft.
Third party insurance should be considered a basic essential. If
you join a model club suitable cover will usually be available
through the organisation. It is your personal responsibility to
ensure that your insurance is adequate (i.e. that its cover includes
electric / glow powered model aircraft).
Make it your job to keep your models and your radio control
system in perfect order at all times. Check the correct charging
procedure for the batteries you are using. Make use of all sensi-
ble safety systems and precautions which are advised for your
system. An excellent source of practical accessories is the MUL-
TIPLEX main catalogue, as our products are designed and
manufactured exclusively by practising modellers for other
practising modellers.
Always fly with a responsible attitude. You may think that flying
low over other people’s heads is proof of your piloting skill; others
know better. The real expert does not need to prove himself in
such childish ways. Let other pilots know that this is what you
think too. Always fly in such a way that you do not endanger
