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1. Mask off the FIN-LOK tab on each of the four Astrobee D
fins. Carefully wash the fins in a detergent/soap bath to
remove any oils left over from the molding process. On the
decal sheet locat the 4 leading edge cuffs (labelled 'M'). Cut
these cuffs and crease each of them along the center
dashed line. Remove the backing from a cuff decal. Center
the dashed line over the leading edge apex of the fin.
(Review instruction drawing for proper orientation.) Press
the center of the decal to the leading edge of the fin. Press
down the sides of the cuff decal over the front of the fin. Be
sure to check the position of the decal as this is done and
press out any air pockets which may be under the decal.
Repeat this step for the remaining fins. Paint each fin matte
light tan. Set aside to dry.
2. Using a hobby knife, carefully remove any body tube
material that may still be attached to any pre-cut slots in the
body tube.
3. Insert the loose end of the shock cord and then the motor
tube assembly into the back of the rocket body tube as
shown. Position the motor tube assembly so that the fin
locks are located under and visible through the body tube's
pre-cut fin slots.
4. Apply cement along the full length of the fin root of a fin
(area of the fin that makes contact with the outside surface
of the lower body tube). Carefully insert the fin through a
LOWER BODY AND FIN ASSEMBLY
slot in the body tube and snap the fin into place. Repeat this
process for the other three fins. (NOTE: Each fin should be
snug against the body tube.)
5. Through the back of the body tube, apply cement where the
fin tabs meet the motor tube, fin locks, front centering ring
and body tube. Through the front end of the body tube,
apply cement where the baffle assembly centering ring
meets the inside surface of the body tube.
6. Locate the length of plastic launch lug rail. Using a model
knife or razor saw cut off two pieces 1 15/16" (49mm) long.
Cut out the aft launch lug top and bottom marking guides.
Trace their patterns on to each of the pieces of launch lug
rail previously cut. Using a sharp model knife, cut these two
pieces to the proper shape. Wash these parts in a deter-
gent/soap bath. Rinse and let dry. Paint both pieces gold.
7. Note the location of the scale launch lugs on the lower body
tube. Carefully cut out the aft launch lug marking guide.
Remove the inner outlined area inside the guide using a
model knife. Place the marking guide between two fins
located 90 degrees around either side of the body tube from
the flight launch lug (See drawing). Using a pencil, lightly
mark the outline of the aft launch lug rail on the end of the
body tube. Apply cement to the bottom of one of the launch
lug rails. Press in place and hold until the cement sets.
Repeat this step for the remaining launch lug rail.
5
A/D-5
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