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Note: if you intend to install an aero-tow release, remember to
cut the slots "A" and "S" in one of the two fuselage panels 6.1,
6.2 to take the pushrod.
When you have glued the fuselage components together you
can saw out the slot "N" through which the towline is engaged.
To operate the release you will need a servo no larger than mini-
size as space is restricted. The servo can be installed aft of one
of the two standard servos for the control surfaces.
- Glue together the outside fuselage panels 6.1 and 6.2 in pairs
with their edges flush.
- Glue the three core components 6.3 - 6.5 to one outside
panel, aligning the parts by lining up the holes. Glue the
assemblies together with their edges flush.
- Drill out the holes using a 4 mm Ø drill.
- Sand the fuselage to a harmonious shape as shown in the
plan view and the cross-sections. Note that the top face must
be left flat.
- Cover or paint the fuselage, again leaving the top surface (the
joint area) bare and untreated.
- Apply a little oil to the threaded shank of the screws 6.6 to
prevent them becoming stuck. Fit the screws 6.6 through the
wing from the top to act as locators. Glue the fuselage to the
underside of the wing.
- Drill 5.5 mm Ø holes in the motor pylon baseplate 6.7.
- Press the captive nuts 6.8 into the holes and apply a drop of
cyano round the edges to secure them.
- Glue together the three parts 6.9 and 6.10 to form the motor
pylon. Note that the joint surface on the underside must be left
perfectly flat.
- Drill out the holes for the screws 6.6 to 4 mm Ø.
- Oil the threads of the screws 6.6 again lightly. Fit the screws
6.6 from the underside to act as locators for the pylon.
- Glue the complete pylon assembly on the baseplate, and
check that the parts are exactly at right-angles.
- Relieve the triangular strips 6.11 slightly to provide clearance
for the captive nuts, and glue the strips on both sides.
- Sand the completed motor pylon base overall.
- If you decide to use the motor pylon it can be attached to the
model using the screws 6.6. Check that the ailerons are not
obstructed in their movement. If necessary trim the pylon
mount base until you are satisfied.
- Paint the completed pylon mount with fuel-proof lacquer to
prevent it absorbing fuel.
- Note on the motor pylon (robbe Pylon Tank):
- Assemble and install the pylon tank as described in the
Building instructions
Hot Shot
instructions supplied with it. Install the glowplug motor and
accessories.
- Disable the throttle barrel.
- Use the spacer sleeve ø 5 x x 6 x 10 mm to mount the propeller
if you need.
- Important: be sure to set the motor thrust line as shown in the
side view on the plan.
- Screw in the towhook 6.12 if you intend using a bungee
system to launch the model.
Balancing
Mark the Centre of Gravity „C.G." on the fuselage on both sides
as shown on the plan.
Support the model at the marked points and allow it to hang
freely. Ideally it will balance level with the nose inclined slightly
down.
If the tail hangs down, you will need to add lead ballast to the
nose. If the nose hangs down too far, fit lead ballast at the tail
of the fuselage. In either case the easiest method is to drill a
hole and fill it with lead.
Fix any lead ballast carefully (i.e. glue it in place) so that there
is no chance of it shifting in flight.
Note: the motor pylon is located exactly at the model's Centre
of Gravity.
This means that you can safely fly the model with or without the
pylon, as the model's balance will not alter. Provided that you
use the recommended components there is no need to re-
balance the model.
Checking the working systems:
Switch on the RC system and check that all trims on the
transmitter are at neutral (centre).
The control surfaces must now also be at neutral as defined by
the template „S". Check the setting of the control surfaces
carefully using the template „S" once more. Adjust the pushrods
if necessary.
The next step is to check the direction of rotation of the servos:
stand behind the model and move the aileron stick to the right.
The trailing edge of the right-hand control surface should now
rise, the left-hand one fall.
Pull the elevator stick back towards you and the trailing edge of
both control surfaces should rise.
If either servo operates in the wrong direction, reverse it using
the servo reverse facility on your transmitter.
Set the control surface travels as stated in the drawing.
12
Order No.
3078
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