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18. Installing the wing spar
Slide the wing spar under the servo leads and through the
fuselage, then glue it in place along its full length.
Fig. 20
19. Servo leads and servo fairings
Deploy the servo leads in the channels in the wings, starting
from the servo end. You may need to use the blunt side of a knife
to push them into the slot. The excess length of the servo leads
can be stowed in the space below the wing root. Trim the servo
fairings 33 to fit, and glue them in place at the corners using
cyano.
Fig. 21
20. Freeing the elevator from the tailplane
Carefully release the elevator by cutting along the marked lines;
the slots should be about 1 mm wide.
Fig. 22
21. Gluing the horn in the elevator
The elevator horn 24 is prepared and fitted as shown in the
illustration. Tighten the nut 27 only lightly, as the swivel pushrod
connector 25 must turn smoothly. Secure the nut with a tiny drop
of paint or glue.
Caution: only apply the paint or glue to the outside of the nut
and the stub of the thread. Glue the horn in the elevator recess.
Fig. 23
22. Installing the tailplane
Trial-fit the tailplane 12 "dry" (no glue), and position it accurately.
Carry out any minor trimming required, then glue the tailplane in
place using cyano, and check its position and alignment again.
Hold or pin the panel in position until the glue has set hard.
Connect the pushrod 31 and set it to the correct length using the
swivel pushrod connector 25.
Fig. 24
23. Fin
Trim the fin 13 to fit, and glue it in place. Check that it is exactly at
right-angles to the tailplane before the glue sets.
Fig. 25
24. Canopy
Glue the latch tongues 23 in the canopy 9 over their full area, but
take care to fit them projecting by the correct amount - not higher
or lower.
Fig. 26
25. Installing the power unit
The ducted fan (impeller) unit is supplied in the kit ready to install,
with a fully balanced rotor. Do not dismantle the assembly unless
there is a real need to do so - after re-assembly the motor might
be unbalanced, which would lead to a loss of performance.
Fig. 27
Connect the ducted fan 50 to the speed controller, and install the
fan in the fan hatch 6. Fix the ducted fan unit in place with a few
drops of cyano applied to the edges, or use double-sided
adhesive tape.
Carry out a test-run, and reverse the motor's direction of
rotation if necessary.
Deploy all cables neatly. The channel for the leads between the
hatch and the impeller should be sealed with a piece of foam.
Introduce the impeller and the hatch into the main duct; a recess
is provided for the speed controller in the intake duct forward of
the ducted fan unit, where it is cooled without causing major
disturbance to the airflow. Note that the cables run along the
outside of the fuselage in the appropriate channel, which is then
sealed with adhesive tape. Apply adhesive tape all round the
ducted fan hatch to produce an air-tight seal.
Fig. 28
26. Receiving system and power system fittings
1. The ducted fan unit is already in place.
2. Mount the speed controller on the maintenance hatch forward
of the impeller unit.
3. Fit the LiPo battery (2100, 2500 or 3200 mAh) in the battery
compartment in the nose of the fuselage, adjust its position to
obtain the correct Centre of Gravity, then secure it with Velcro
tape.
4. The receiver and cables are also held in place with Velcro
tape 20 + 21, which is supplied in the kit.
27. Centre of Gravity
The CG should be borne in mind when you are installing the RC
system components, to avoid the need for ballast as far as
possible.
The CG should be within the range 100 to 110 mm aft of the wing
root leading edge, measured where the wings meet the fuselage.
The moulded-in dimples on the underside of the wing indicate
the correct balance point.
Fig. 30
28. Model settings (guideline only):
CG:100 - 110 mm
Longitudinal dihedral:approx. +1° (non-variable)
29. Control surface travels:
Measured at the widest point of the control surfaces
Ailerons:
Elevator:
Exponential: ailerons 30%, elevator 15%
30. Test-flying:
Centre of Gravity
Start by balancing the model within the stated range. Once you
have test-flown the model, 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.
31. Aileron differential
Fly three or four rolls to the right at half-throttle; if the Twister
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.
32. Gilding the lily - applying the decals
The kit is supplied with a multi-colour decal sheet, part 2 + 3. Cut
out the individual name placards and emblems and apply them
to the model in the positions shown in the kit box illustration, or
in another arrangement which you find pleasing. We suggest
that you blacken the canopy and the jet nozzle with a waterproof
felt-tip pen, e.g. EDDING 3000.
33. 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 for the type of model
(powered model aircraft).
10 to 15 mm +/-
10 mm +/-
9
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