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the plan. Drill a 3 mm Ø hole into the stern tube through
the grease tube once the joint has cooled down. Remove
all drilling swarf. Fit the locknut 12 and the propeller 13 on
the shaft 11.
Fit the prepared stern tube through the hole in the hull from
the inside, then slip the propeller shaft into the tube from
the rear. Fit the tube support 14 under the stern tube, and
check that it rests on the support over its full length without
being under tension. You may need to adjust the hole in
the hull slightly.
The motor can now be installed. Fit and screw the prepa-
red coupling onto the prop shaft and the shaft of the motor
and bring motor and shaft assembly into allignment. If you
like, you can allign the coupling with 3 pcs of stripwood and
tape, that it remains stiff. Measure the distance between
the stern and the bulkhead, then glue the bulkhead and
stern tube in the hull, using plenty of UHU plus acrylit to
form a fillet round the joints.
Fit the two O-rings 18 and the brass bush 19 on the shaft
of the Kort nozzle 17; note that the rings must fit in the
annular channels. Slide the Kort nozzle and bush into the
hole in the hull from the underside, holding it at a slight
angle to the rear.
Fit the lower bearing 20 on the bottom spigot of the Kort
nozzle and align the system so that its underside is in line
with the keel. Check that the propeller is in the centre of
the Kort nozzle when viewed from the rear. Glue the lower
bearing 20 in this position, and secure it carefully while the
glue is hardening, packing up the Kort nozzle to keep it in
place.
Now invert the hull and apply a generous fillet of UHU plus
acrylit round the brass bush 19 where it meets the hull.
Check that the Kort nozzle still swivels smoothly.
Push the collet 22 into the steering lever 21 and fit the so-
ckethead screw 23. Fit the completed steering lever on the
rudder shaft and tighten the screw.
If you intend to install a battery other than the lead-acid or
seven-cell Nickel pack recommended, you may need to
adjust the opening in the mounting plate 24. These inst-
ructions describe the installation of the lead-acid battery
shown on the plan.
RC installation
Note: The receiver battery cradle 37, the receiver battery
38 and the switch 41 are also no longer required.
Glue the stiffening frame 24a to the underside of the moun-
ting plate 24. Glue the plate 24 in the hull, and weight it
down until the glue has set hard.
Hold the servo mount 26 (Not included) on the servo
mounting plate 25, drill suitable pilot-holes, and fix it in
place using the screws 27 and nuts 28.We recommend
gluing the servo with double-sided adhesive tape
directly to the servo board.
Note the angle of the servo mount as shown in the plan
view, and take care to maintain it accurately.
The prepared servo mount assembly can now be glued in
the hull in the position shown in the plan view. Fix the servo
29 in the mount when the glue has set hard.
The steering pushrod is made up from parts 30 - 32. Cut
the steel steering pushrod 31 to approximate length, and
solder a clevis 30 to one end. Screw the second clevis
onto the threaded coupler 32. Connect the soldered clevis
to a hole in the steering lever as shown, and connect the
clevis and threaded coupler to the servo output arm, after
cutting it down as shown on the plan. Cut the pushrod to
exact length, then solder the cut end in the socket of the
threaded coupler.
Final adjustment of the pushrod is carried out at a later
stage, as part of the check of the working systems.
Place the drive battery 33 and the speed controller 34 in
the hull.
During the wiring procedure please keep to the instruc-
tions provided with the speed controller. The red and black
wires attached to one end of the speed controller are those
which should be connected to the drive battery. Attach an
AMP-Faston plug 35 to each wire, and push them into the
corresponding connectors on the drive battery. The use of
connectors allows you to remove the battery at any time for
charging.
The receiver 39 can be secured on the mounting plate
using double-sided adhesive tape.
The RC system can now be connected. At this point it is
possible to make final adjustments to the steering system,
and test all the working functions. Give the drive battery a
full charge before you do this.
Adjusting the steering system, testing the working
systems
Switch on the transmitter and connect the speed controller
to the battery. The rudder stick and trim lever should now
be at centre. The rudder servo will now also be at "neutral"
(centre). Screw the clevis in or out on the threaded coupler
until the steering pushrod is at right-angles to the line of
holes in the steering lever. The Kort nozzle should now be
at "neutral" (straight ahead). If not, loosen the socket-head
screw 23 and adjust the Kort nozzle.
With these adjustments completed, check the movement of
the Kort nozzle including trim travel: the Kort nozzle must
be able to deflect through the same angle on both sides of
centre, without the nozzle or the steering pushrod binding
or fouling at any point.
The throttle function should be assigned to a non-neutrali-
sing stick on the transmitter. Check the system as follows:
move the stick forward (away from you), and the propeller
should rotate to the left (anti-clockwise) when viewed from
the rear.
If it spins in the reverse direction, swap over the connec-
tions between the motor and the speed controller.
On no account swap over the wires between the speed
© Krick Modelltechnik, Germany, Stand 04.2021
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