DynaStar Grappler Manuel - Page 6

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Parachute Assembly
24. Carefully cut out the parachute canopy
along the dashed lines. Place one reinforce-
ment ring on each of the marked corners.
Take a sharp pencil or knife and poke a hole
through the plastic in the center of each ring.
25. Fold the shroud line in half, and cut at
the fold to make equal lengths; cut each piece
in half again to make a total of four lines of
equal length.
26. Pull each parachute line end through a
parachute reinforcement ring and tie using two
overhand knots. Repeat for all the corners as
shown.
27. Holding the parachute at the center of
its top, pull the lines together to even up the
ends. Thread the 4 looped lines through the
loop at the base of the nose cone. Take the
top of the parachute and pull it through all 4
string loops at the same time and then pull to
tighten the knot. This securely attaches the
parachute to the rocket.
28. Congratulations! Your Grappler is now
complete.
Launch Supplies Needed
To launch your rocket you will need the follow-
ing supplies:
u A model rocket launching system.
u Flame resistant recovery wadding.
u Recommended 24mm Diameter Rocket
Engines — see the motor matrix to the right.
Page
6
A
Tape Ring
B
Motor Matrix: How High Will the Grappler Fly With Different Motors
Motor
Produced
Type
by:
D12-5
Estes
E15-7
Aerotech
E30-7
Aerotech
The Estes E9 is NOT recommended for use in this rocket. It doesn't have enough
kick to keep the rocket going straight up. It will make the rocket go horizontal, which
is very dangerous.
The above motor matrix was made using RockSim. Initial conditions:
slightly breezy (3-7mph wind), straight up launch angle. You can use
RockSim to find other motor combinations that will work well in the Grap-
pler rocket kit. Download the RockSim file for this kit at: www.ApogeeRock-
ets.com/grappler.asp
Poke hole through
each ring.
Estimated Altitude
Estimated Altitude
(feet)
329 ft
1164 ft
1178 ft
C
(meters)
100.5 m
354.9 m
359.2 ft