Model Rockets Super CENTAURI User manual

Assembly
Instructions
Parts Included:
1 Nose Cone
1 Body Tube
1 Payload Tube
3 Laser Cut Balsa Fins
1 Thrust Ring
1 Motor Tube
2 Launch Lugs
1 Motor Hook
2 Centering Rings
1 Cou ler
2 Bulkheads
1 Screw Eye
1 Kevlar Shock Cord (yellow)
1 Elastic Shock Cord (white)
1 Parachute Kit
1 Decal Sheet
Materials (not Included):
Scissors
Ruler
Yellow Wood or White Glue
Sanding Sealer
Paint Brush
Sand a er (#240 grit)
Gloss S ray Paint
Primer S ray Paint
Masking Ta e
Motor Mount and
Shock Cord Assembly
Step 1 – Tie a single knot at the end of the
yellow kevlar shock cord.
Step 2 – Insert the flat end of the metal
motor hook into the re-cut slot ¼” from the
end of the motor tube.
Step 3 – Slightly ex and the inside of the 2
larger centering rings by twisting on the end
of the nose cone. Important: Don’t ex and
the smaller trust ring.
Step 4 – While holding the motor hook in
the slot, a ly glue around the motor tube
between the marks. Push the ex anded end
of the centering rings over the motor hook
with the knotted end of the kevlar shock cord
through the rear centering ring until the rings
are between the marks on the motor tube.
Step 5 – A ly glue around the outside of
the thrust ring and insert into the motor tube
at the end where the motor hook is inserted.
Push in until against the motor hook and flush
with the end of the motor tube.
Step 6 – Loo the yellow kevlar shock cord
through the thrust ring end of the motor tube.
The rings should be ositioned as shown.

2
Inserting and Attaching
the Motor Mount
Step 1 – Using a Q-ti or your little finger
a ly glue liberally around the inside end of
the body tube about ½” in at the end of the
slots for the fins.
Important: Do the following motor mount
insertion in one move. Do not sto until the
motor mount is in the correct osition.
Step 2 –Insert the motor mount and ush
in until the bottom of the motor tube is flush
with or slightly below the bottom of the body
tube. Both rings should be clear of the fin
slots. Clean any residue glue from the slots
and set aside to dry.
Preparing and
Attaching the Fins
Step 1 – Press or break out the balsa fins
from the laser cut sheet.
Step 2 – Sand the leading edge and the ti
of each fin round. Leave the root of the fin
where it inserts and attaches to the body tube
square.
Step 3 – A ly a bead of glue to the root
edge on each fin and insert the root tab of
each fin into the fin slots on the body tube.
The front root edge of the fins should glue
against the motor tube inside and the rear
root edge against the body tube outside.
Step 4 –A ly a thin bead of glue along the
length of the launch lug and attach to the
body tube where the launch lug line is
marked. Allow to dry for ½ hour or more.
Important: Kee the fins and the launch
lug aligned while drying. Make sure the fins
are aligned 120 degrees a art. Use the fin
guide on the next age to align the fins while
drying.

3
Preparing and
Attaching the Fins Continued…
Step 5 – After the fins and launch lug have
dried, a ly a thin layer of glue between the
body tube and the fins, and the body tube and
launch lug with your finger to create a fillet
that will strengthen the fins and launch lugs.
Set aside to dry. Check the fin alignment to
make sure they are 120 degrees a art while
drying.
Assembling the
Payload Section
Step 1 – A ly glue to the hole in the
center of the lywood bulkhead. Screw in the
screw eye in the same hole. A ly glue to the
edge of the bulkhead and insert into the
cou ler until flush with the end of the cou ler.
Set aside to dry.
Step 2 – A ly a thin bead of glue around
the inside edge of the ayload tube and insert
the bulkhead assembly until it is ½” from the
end of the ayload tube.
Step 3 – A ly a thin bead of glue along
the length of the launch lug and attach to the
body tube where the launch lug line is
marked. Allow to. After it is dry, fillet the
launch lug on the ayload section.
Step 4 – Check the fit of the cou ler in the
body tube. If necessary, sand with #240 grit
sand a er (usually not necessary) for a
friction fit. Wra masking ta e around the
shoulder of the nose cone for a snug fit in the
ayload tube.
Attaching the Parachute
and Payload Section
Step 1 – Feed the yellow kevlar shock cord
through the bottom of the body tube and ull
out through the to .
Step 2 – Tie both the white elastic shock
cord and the yellow kevlar shock cord
together with a single loo ing knot and ull
both shock cords a art to tighten the knot.
Step 3 – Remove the arachute arts from
the arachute kit bag and follow the assembly
instructions rinted on the arachute sheet.
Step 4 – Tie the end of the arachute
shroud lines to the screw eye on the ayload
section.

4
Finishing Your Rocket
(Optional
Step 1 – Using 240 grit sand a er, sand
the nose cone so that the aint will stick.
Step 2 – Roll u a sheet of a er and insert
into the bottom of the rocket body tube to
hold your rocket, a ly a thin coat of flat
white or gray rimer s ray enamel to the
whole rocket using even back and forth
movements. Let the rimer dry and sand
using 240 grit sand a er. Re-coat and sand
as necessary.
Step 3 – A ly a first thin color coat of
gloss s ray enamel to the whole rocket using
even back and forth movements.
Let the first coat tack u for a few minutes.
Then follow u with a heavier coat. Do not
coat too heavily or the aint will sag. The best
results are obtained when the color coat is
just thick enough to gloss. If additional coats
are needed to cover the rimer with full color,
re-a ly after the color coat has tacked u
within the first hour or wait 24 hours until the
color coat is com letely dry. Let the final coat
dry for 24 hours.
Step 4 – Remove the ressure sensitive
decals from the backing a er and a ly to
the fins and body tube. Use the icture on the
cover of this manual for a guide to decal
lacement.
Flying Your Rocket
F ight check ist:
□ Model Rocket
□ Launch Pad & Controller w/Batteries
□ Recovery Wadding
□ Model Rocket Motors and Igniters
Recommended Motors for the CENTAURI
rocket are A8-3. A6-4. B4-4, B6-4, C6-5 &
C6-7
Step 1 – Insert 2-3 crum led recovery
wadding sheets into the body tube and the
shock cord after the recovery wadding.
Step 2 – Fold the arachute and roll u
small enough to fit into the rocket body tube.
Insert the arachute into the rocket body tube
and insert the ayload section and align the
launch lug of the ayload section with the
launch lug on the body tube to com lete the
recovery assembly.
Step 3 – Install model rocket motor igniter
according manufacturers recommended
rocedure.
Step 4 – Insert the rocket motor with the
nozzle/igniter end facing the rear of the
rocket. The motor should cli into lace with
the motor hook retaining the motor.
IMPORTANT:
FOLLOW THE N.A.R.
SAFETY CODE REGARDING
LAUNCHING AND THE USE OF MODEL
ROCKET MOTORS