Apogee Spek Manuale di istruzioni - Pagina 3
Sfoglia online o scarica il pdf Manuale di istruzioni per Giocattolo Apogee Spek. Apogee Spek 6. Two-stage altitude rocket for altimeters
7. Fine sand the balsa wood laser-cut
sheets using 200 and then 400 grit sand-
paper before removing the fins. Carefully
remove all the pieces from the sheet by free-
ing the edges with a sharp hobby knife.
For higher flights, round the edges of the
fins with sandpaper – or better yet – sand an
airfoil shape into them. Test fit the fins into
the slots on the fin alignment fixture. If they
are too tight, you will need to sand down the
thickness slightly.
8. Sealing the surface of the balsa with
sanding sealer reduces the skin friction drag
on the rocket, allowing it to fly higher. It also
improves the rocket's appearance. Apply the
sealer with a paintbrush. When dry, sand it
with 400 grit sandpaper. Repeat the proce-
dure until the balsa grain is filled and the fins
look and feel smooth.
9. Slide the fin alignment fixture onto the
long body tube over the end that is etched
with the fin lines. Test fit the smaller set of
fins into the fixture. Position the trailing edge
of the fins on the tick-marks that are etched
onto the fin lines. When you know how the
fins are attached, you can remove them from
the fin alignment fixture and apply wood glue
to the root edge and then put them back into
the fin alignment fixture. Allow the glue time
to dry before removing the fin fixture.
10. Repeat the process of attaching the
fins, but this time use the larger fins and at-
tach them to the short booster stage tube.
OPTIONAL: For competition flights, it is
recommended that you launch the rocket
from a piston launcher or from a launch
tower. But if you do not have one, you'll
need to use a standard launch rod. In that
case, install the launch lug as follows.
11. Glue the balsa wood standoff to the
front end of the body tube in the position
marked on the tube. When the glue is dry,
glue the launch lug to the stand-off using
wood glue. Make sure the lug is parallel to
the length of body tube.
12. Add wood glue fillets to the fins and
the launch lug (if added). Lay the rocket
horizontally to let the glue dry.
p/n 31129
7
8
Smaller fins
9
Fin location
line
Larger fins used
in booster stage
10
11
12
Sustainer (upper stage)
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