Kavan CUMUL DLG Bauanleitung Seite 5

the fin and rudder assembly into the notch in the end of the tail boom and
tack glue it to the tail boom. Bind the fin to the tail boom with a Kevlar®
thread threaded through the slots in the fin.
◊ Slide the horizontal stabilizer on the F22 tailplane pylon; align it square
to the fin and to the longitudinal axis of the tail boom and tack glue it to
the pylon. Double check the correct alignment; once satisfied, apply a ge-
nerous amount of cyano along all the joints and onto the Kevlar® thread.
Insert the elevator and rudder push rod outer tubes into the tail boom.
Secure them with a piece of polyurethane foam soaked with epoxy that
you will work into the centre of the tail boom with a thin stick. This is great
for a precise, slope free elevator and rudder control. (Fig. 20 + 21)
◊ The F12 servo mount supplied in the kit has been tailored for the re-
commended KAVAN GO-6MG servos. If you go for a different type of ser-
vos, the openings might need a bit of trimming. We recommend soaking
the edges of the servo openings with cyano. Once satisfied, glue the F12
servo mount in place (the servos are to be fitted in the up side down po-
sition). (Fig. 22)
◊ Thread the protruding ends of the elevator and rudder push rod outer
tubes through the holes in the F6 former so the tubes lead directly to
the horns of servos in the F12 servo mount. Insert the tail boom into the
fuselage - no glue yet.
◊ Attach the wing to the fuselage and secure with the M4 bolt. Looking from
above, front and rear check the fuselage and tail boom are straight and the
wing dihedral makes a nice symmetrical "V" in relation to the horizontal
stabilizer. Once satisfied cut the push rod outer tubes to the correct length
and epoxy thoroughly the tail boom into the fuselage. Double check the
correct alignment before the glue sets.
◊ Solder the M2 brass threaded couplers on one end of the 0.8 mm piano
wire push rods. Screw the ball links on and slide the push rods into the
FLYING
Be sure you are using fully charged batteries. Now (and before any further
flight again) check correct function of whole radio equipment, motor and
moving of control surfaces. Be sure any part of flight equipment cannot
move during flight. We strongly recommend making a range check (see
your radio instruction manual for details).
The first flight: Wait for a calm day. Fly only on a safe site as a RC club flying
field. Glider will be very happy on your favourite slope on a calm day. The
very light lift will allow perfect fine trimming out.
Switch your transmitter and then the receiver on and check all the working
systems one more time. Facing INTO the wind hold your transmitter in one
hand; grip the model in the other hand near the centre of gravity. Hold it
at head level and give the model a fairly powerful push exactly into wind;
wings level, nose slightly down. Your model should now glide in a long,
flat and straight path without needing any help from you. Use the controls
gently if necessary, and adjust the trim tabs until your CUMUL DLG glides
above described way. Now check the position of control surfaces; set
length of pushrods to bring back trim tabs on your transmitter to central
position if necessary (we strongly recommend doing it in any way). Check
again gliding of your CUMUL DLG.
Now you are ready to make your first discus launch.
Discus Launch
The discus launch allows your model reaching quite high altitude without
much effort. As it is with any "sport performance", it will require some trai-
ning in order to do it right – our step by step manual makes it easy. We will
describe the procedure for a right-handed pilot; with the launching pin atta-
ched to the left wingtip. The "left-handed" procedure is the mirror image.
respective outer tubes. Secure the ball links to both two servo arms with
the M1.6 screws supplied in the kit. Insert the fibreglass control horns into
the slots in the elevator and rudder - do not glue yet. Set the servos to the
neutral with your radio on; attach the servo arms square to the side of the
servo case. Set the elevator and rudder flush with the horizontal stabilizer
resp. fin. Mark the correct length of the push rods and bend them to the
right angle (you can make a "Z-bend", but the simple L-bend usually works
well enough). Insert the L-bends into the holes in control horns and cyano
the horns into the elevator and rudder still set in the neutral position. Fina-
lly, secure the servos with drops oh hot melt glue, silicone or MS polymer
glue in the servo tray. (Fig 20 + 21 + 22)
◊ Install your received into the fuselage under the wing, the receiver battery
will go into the nose. (Fig. 18 +22)
Wing
◊ Epoxy thoroughly the carbon discus launch pin into the left (for a right-h-
anded pilot) or right (for a left-handed pilot) wing tip. (Fig. 25)
Tow Hook
◊ Install the tow hook into one of the pre-drilled holes in the F7 tow hook
plate; it should be positioned about 5 mm in front of the centre of gravity.
Recommended Control Surface Throw, CG Position
◊ CG Position: 69-72 mm
◊ Rudder: ±25 mm
◊ Elevator: ±10 mm
◊ Discus launch configuration: rudder -1 mm against the direction of the
launch (right-handed - rudder 1 mm right), elevator 1 mm down.
(Note: Use this configuration for the climbing phase of the discus launch
only; and only after the model has been trimmed out properly and you've
made yourself familiar with the controls.)
Position A - Getting Ready:
Your right index finger and middle finger should be wrapped around the
launch pin at the left wing tip. Your thumb is to be gently pressed against
the leading edge of the wing. Stand with your left shoulder into the wind
and the right wing tip pointing at ca 45° angle to the ground.
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A