DynaStar Grappler Manuel - Page 3

Parcourez en ligne ou téléchargez le pdf Manuel pour {nom_de_la_catégorie} DynaStar Grappler. DynaStar Grappler 8 pages. Mid-power model rockets

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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.

Sheet B - P/N 31067

1/2" (13mm)

Pull

Tight

Smear glue around inside of tube.

1/2" (13mm)

Cut a notch for

the shock cord.

Glue ﬁllets on both sides of rings.

7" (17.8 cm)

Smear glue after partially

inserting tube.

Edges of tubes

should be even.

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