DynaStar Grappler Bedienungsanleitung

Page 1

Grappler Parts List

P/N Description Qty

10092 Yellow Engine Mount Sleeve (AS-24/4.00) 1

10097 Engine Mount Tube (AT-24/15) 1

10197 Airframe Tube (AT-66/18) 2

13031 Centering Ring (CR18-24) 1

13035 Centering Ring (24-29) 2

13044 Airframe Coupler (AC-66) 1

15027 Die-Cut Ring Set CR24-66 1

13056 Launch Lug (1/4” X 3”) 1

15540 Die-cut balsa ﬁn sheet 1

19480 Plastic Nose Cone PNC-66A 1

24041 Standard Engine Hook 1

23011 Parachute Reinforcement Rings (8) 1

29500 Parachute Shroud Line (21.3 feet) 1

29117 32” Plastic Parachute canopy 1

29506 300# Test Kevlar®Shock Cord (8 ft) 1

31066 Grappler Instruction Sheet A 1

31067 Grappler Instruction Sheet B 1

37020 Grappler Tube Marking Guide Sheet 1

41029 Printed Decal Sheet 1

Other Tools and Materials Needed

• Scissors

• Hobby Knife

• Pencil

• Carpenter’s Wood Glue (or White Glue)

• CyA Adhesive (medium viscosity)

• Masking Tape

• Sandpaper (200 and 400 grit) & Sanding Block

• Aluminum “Angle” to draw lines on the tube

• Ruler

• Wood ﬁller or sanding sealer to smooth balsa ﬁns

• Paint Brush

• Spray Paint

• 24mm Spent Engine casing to insert engine block.

• Long wood dowel to spread glue deep inside tubes.

• 3 1/4 inch wooden dowel

Mid-Power

Model

Rockets

1130 Elkton Dr., Suite A

Colorado Springs, CO 80907 USA

web site: www.DynaStar-Rockets.com

Skill Level 2 – Previous Experience Suggested

The Grappler is about the biggest model rocket you can

make that still is under 1-pound in weight at lift-off. This

is important, because you don’t need FAA permission to

launch it. That gives you high-power thrills with inexpen-

sive low-power rocket engines. The Grappler is easy to

build, uses readily available “D” and “E” size rocket mo-

tors, and is a real eye-catching model that is sure to get

you noticed whenever you launch it.

While this is a big rocket, it is easy to build: it is only

ranked as a skill level two in difﬁculty. It can be assem-

bled by anyone that has built any other model rocket kit.

GRAPPLER

GRAPPLER Kit #5032

Sheet A - P/N 31066

Page 2

�

Grappler Rocket Assembly

1. Using 400 grit sandpaper, ﬁne sand the

balsa die-cut sheets before removing the ﬁns.

Carefully remove all the pieces from the balsa

sheet by freeing the edges with a sharp hobby

knife.

2. Group the three ﬁns together, and gently

sand the edges as shown in the illustration.

3. You can apply sanding sealer to the

surfaces of the balsa ﬁns. Coat both sides at

the same time to minimize the chances of the

ﬁns warping. Do not allow the sanding sealer

to get on the root edge of the ﬁn. This could

prevent the ﬁn from bonding well to the body

tube when it is glued on later in step 17. Set

them aside to dry completely. When they are

dry, sand the sealer smooth until you get a de-

sirable surface ﬁnish. You may need to repeat

this step several times depending on the level

of quality you wish to achieve.

4. Mark a line on the outside of the motor

mount tube 2 1/4 inches (57mm) from one

end. This end will be the aft end of the rocket.

Make this line about 1/8 inches (3mm) long as

the picture shows. Take a hobby knife and cut

a 1/8 inches (3mm) long slit in the engine tube

along the line as shown in the picture. Insert

one end of the motor hook into this slit.

5. Make a mark 1 1/2 inches (38.1mm)

from the rear of the engine tube. Locate the

yellow airframe sleeve. Apply a layer of glue

around the tube for a 2 inch length, forward

of the mark that you made. Slide the yellow

sleeve over the engine hook and onto the

engine tube until the rear end of the sleeve is

lined up with the mark. Apply a ﬁllet of glue to

both ends of the sleeve (Be sure that the en-

gine hook remains perpendicular to the engine

tube).

6. Now mark 1 1/8 inches (29mm) from the

rear of the engine tube. Find one of the large

green rings that ﬁts over the 24mm diameter

engine mount tube. Make a thin layer of glue

around the engine tube behind the mark you

made. Take the green ring, slide it over the

engine hook, and then onto the engine tube

until the rear end of the ring is lined up with

the mark you made (Be careful of the hook as

above).

7. Remove one of the three large centering rings

from the die-cut card sheet and apply a bead of

wood glue 71/2 inches (17.8 cm) from the front end

of the engine tube, Slide the cardboard centering

ring into the bead of glue. Check to be sure the ring

is aligned straight on the tube. Allow the glue to dry.

Engine Hook Size “A” Length

D-Engine 2-1/4” (57mm)

Do NOT use the Estes E9 in this rocket.

It doesn’t have enough thrust to safely lift

this big rocket kit.

1/8” (3mm)

1-1/8” (29mm)

7 1/2” (17.8m)

1-1/2”

Yellow Sleeve

Page 3

8. Remove a second large centering ring

from the die-cut card sheet. Apply a bead of

wood glue around the engine mount tube, 1/2

inch (13mm) from the aft end. Slide one of

the cardboard rings onto the engine tube over

the engine hook and into the bead of glue.

Check to be sure the ring is aligned straight as

shown.

9. Make a mark 1/2 inch (13mm) from the

front of the engine tube. Find the other large

green ring that ﬁts over the 24mm diameter

engine mount tube. Cut a notch on the inside

with a hobby knife. Tie the yellow Kevlar®

shock cord around the front end of the engine

mount tube. Apply a thin layer of glue in front

of the mark. Slide the green ring over the

shock cord and onto the tube, into the glue,

and up against the mark. The shock cord

should ﬁt tightly up against the ring.

10. Engine block installation: Using wood

glue, glue the smallest green ring (the en-

gine block) into the forward end of the engine

mount tube. Push it in using a long wood

dowel until it rests against the top of the en-

gine hook. Once it is in place and dry, add a

ﬁllet of glue around the front edge of the green

engine block using a 3 1/4 inch wooden dowel.

11. After the glue on the engine mount is

dry, put a ﬁllet of glue on each side of all three

of the centering rings. These rings take a lot of

stress at engine ejection, and you must make

sure to have a good glue bond (Note: it is not

necessary to use epoxy. Wood glue is plenty

strong for this application). Allow the glue to

dry completely before proceeding to step 11.

12. Test ﬁt the engine tube assembly into

one of the AT-66 tubes. If it is too tight, sand

the centering rings slightly. Apply wood glue

7 inches (178mm) in from the aft end of the

body tube. Insert the engine mount, and push

with one motion until the middle centering ring

makes it about 3 inches (76mm) past the aft

end of the body tube. Quickly apply wood glue

inside the body tube 1/2 inch (13mm) from

the aft end. Immediately push the motor tube

in until the aft end is ﬂush with the body tube.

Apply additional wood glue to the exposed

centering ring/body tube, making another ﬁllet.

Stand tube upright with engine hook hanging

over the edge of table until the glue is dry. This

prevents excess glue from dripping forward in

the tube.

1/2” (13mm)

Cut a notch for

the shock cord.

Pull

Tight

Glue ﬁllets on both sides of rings.

1/2” (13mm)

7” (17.8 cm)

Smear glue around inside of tube. Smear glue after partially

inserting tube.

Edges of tubes

should be even.

Sheet B - P/N 31067

Page 4

13. Thread the shock cord through the

remaining cardboard centering ring. Then slide

it into the front end of the body tube, and then

over the forward end of the engine tube. Push

it until it rests up against the green ring. Add

a ﬁllet of glue to the front side of the centering

ring at the centering ring/body tube joint and

also at the centering ring/motor mount tube

joint. Place upright on a table to allow the glue

to dry.

14. Take the red AC-66 Airframe Coupler

and test ﬁt it into the front end of the mo-

tor mount assembly. Mark the coupler with

a pencil 2 inches (51mm) from one end,

which will be the forward end. Run a bead of

glue around the coupler on the rear half and

smooth it out with your ﬁnger. Now, push and

turn the coupler as you insert it into the for-

ward end of the tube. Stop when it gets to the

line. Wipe any excess glue away.

15. Apply wood glue to the exposed portion

of the coupler tube and quickly twist on the

upper body tube until the two body tubes are

butted-up against each other. Allow the glue

to dry.

16. Cut out the tube marking guide from the

pattern sheet (see page 8). Wrap the guide

around the aft end of the bottom white body

tube and tape the ends together. Mark a small

line at each of the arrow points. Remove the

marking guide.

17. Using a your metal angle tool (a door

frame will work, but it is not recommended on

large diameter tubes), draw a pencil line down

the outside of the body tube at each pencil

mark. Label the launch lug line so you don’t

glue a ﬁn in the wrong position.

18. Lightly sand the area along which the

ﬁns will be attached; just enough to take the

“sheen” off the tube. Apply a very thin layer of

glue to the root edge of one of the ﬁns. Allow

the glue to dry slightly for ﬁve minutes, and

then attach it along one of the lines on the

body tube, as shown in the illustration. Each

ﬁn is attached so that it is ﬂush with the end

of the tube. Make sure the ﬁn is straight along

the tube. Allow the ﬁn to dry before proceeding

with the next ﬁn. Repeat this step two more

times as you attach the other two ﬁns.

Glue ﬁllet on both inside and outer perimeter.

2” (5.1 cm)

Shock cord

Fin

Note the wood

grain direction.

YES NO

Page 5

19. Apply a bead of wood glue to both

sides of each ﬁn-body tube joint. Pull your ﬁn-

ger along the joint to smooth out and remove

the excess glue. Lay the tube horizontally

while the glue dries.

20. Using wood glue, attach the launch

lug to the tube on the pencil line; position it

so that it is ﬂush with the seam where the two

body tubes meet. Allow the glue to dry. Apply

a bead of wood glue to both sides of each

launch-body tube joint. Pull your ﬁnger along

the joint to smooth out and remove the excess

glue. Lay the tube horizontally while the glue

dries.

21. After all the glue has completely dried,

you may now paint your Grappler model

rocket (Note: you can temporarily put the nose

cone on the white body tube while you paint

the rocket).

Roll a piece of paper and insert it into the

aft end of the body tube so you can hold the

model while painting it. For best results, paint

the model with primer before using the ﬁnal

paint colors. Follow the directions on the paint

can, and always paint outdoors with the wind

against your back. Let the paint harden at

least 24 hours before proceeding.

22. Cut around the perimeter of the de-

cal with a pair of scissors. Peel off the paper

backing, and afﬁx the decal in place on the

model. Use the picture on page 1 for decal

placement.

23. Tie the loose end of the shock cord to

the loop on the base of the nose cone using 2

overhand knots. Apply a little bit of the wood

glue onto the knot to keep it from coming

untied.



Front edge of launch lug even with tube seam.

www.DynaStar-Rockets.com

DynaStar is a brand of Apogee Components, Inc.

1130 Elkton Drive, Suite A

Colorado Springs, CO 80907 USA

DynaStar Mid-Power Model Rockets

P/N 41029

Nose Cone: paint “silver”

Fins: paint “silver”

Body Tube: paint “black”

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.

�

Figure 1

Shroud line

Adhesive circle

a division of APOGEE ROCKETS

1130 Elkton Drive, Suite A

Colorado Springs, CO 80907 USA

www.ApogeeRockets.com

CAREFULLY CUT OUT ALONG DASHED LINE

STEP 2

Press the circle firmly and attach second end to the

circle next to it on the same side of the parachute

(see Figure 2).

STEP 1

Carefully cut out parachute canopy along dashed lines.Take parachute

shroud line and cut into 3 equal lengths. Placing the end of each shroud

line over a circle at the parachute corners, secure line with adhesive

circle as shown in Figure 1.

Figure 2

STEP 3

Holding the parachute canopy

by the center of its top, pull the

lines together and try to even up

the ends.

STEP 4

Pass the parachute lines through the nose cone eye screw. Pass the canopy

completely through the loop ends of the parachute. Pull the lines tightly against

the eye screw and fix the knot in place with a drop of glue.

nose cone eye screw

Tape Ring

Poke hole through

each ring.

Page 6

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

Motor

Type

Produced

by:

Estimated Altitude

(feet)

Estimated Altitude

(meters)

D12-5 Estes 329 ft 100.5 m

E15-7 Aerotech 1164 ft 354.9 m

E30-7 Aerotech 1178 ft 359.2 ft

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.

Motor Matrix: How High Will the Grappler Fly With Different Motors

Rocket Preﬂight

A. Loosely crumple and insert 8 sheets of

recovery wadding into the body tube.

B. Carefully fold the parachute and insert it

into the tube with the shock cord.

C. Insert the motor into the motor tube until

the motor hook holds it in place.

D. Insert and secure the engine igniter as

directed on the package the engines came

with.

Countdown and Launch Procedure.

Fly your rocket on a large ﬁeld that isn’t near

any power lines, trees, or low ﬂying aircraft.

The larger the ﬁeld, the greater your chances

of recovering your rocket. The launch area

around the pad must be free of dry weeds and

brown grass. Launch only during calm weather

with very little or no wind and good visibility.

Always use a launch pad that includes a blast

deﬂector.

10. Remove the safety key from the launch

controller

9. Slide the launch lugs over the launch rod

to place the rocket on the pad. The rocket

should slide freely over the rod.

8. Attach the micro-clips to the igniter. The

clips must not touch the other or the metal

blast deﬂector.

7. Stand back from your rocket as far as the

launch wire allows (at least 5 meters - 15

feet).

6. Insert the safety key to arm the launch sys-

tem. The light (or buzzer) on the controller

should come on.

Give a loud countdown 5 ... 4 ... 3 ... 2 ... 1 ...

LAUNCH!

Push and hold the button until the engine

ignites. Then remove the safety key and place

the safety cap on the launch rod.

Misﬁre Procedure

Occasionally the igniter will burn, but the mo-

tor will fail to ignite. If this happens, the cause

is that the pyrogen on the igniter was not in

contact with the engines propellant. When an

ignition failure occurs, remove the safety key

from the launch controller and wait 60 seconds

before approaching the rocket. Remove the

old igniter from the engine and install a new

one. Make sure that the igniter is insert fully

into the engine and touches the propellant.

Secure the igniter as directed on the engine

package and repeat the countdown and

launch procedure.

1 2 3

Fold

Peak

Down.

Spike

Canopy. Lay Excess String

on Top of Canopy.

Roll Sides Inward.

Loosely Wrap Any

Excess String around

Canopy And Insert.

Hook securely latched over edge of the

rocket engine.

Page 7

Place wadding in ﬁrst. Do

not compact too tight.

insert parachute last.

Always follow the NAR* Model Rocket Safety Code when launching model

rockets.

*National Association of Rocketry

**Kevlar® is a brand name of E.I. DuPont for their selection of aramid ﬁbers.

Only DuPont makes Kevlar®

Make sure the clips don’t

touch each other, or the

metal blast deﬂector.

Page 8

Fin

Launch Lug

Fin Template

Use this template to make replacement

fins, just in case you break one off.

Note the wood grain direction!

Overlap

Visit Us Online at: www.Dynastar-Rockets.com

Tube Marking Guide Sheet

P/N 37020

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