Dynaflite DYFA3901 - Manual (Page 17)

Q 10. Make two 3/16" balsa hatch keys from
leftover 3/16" square sticks. Wedge the hatch keys
between the fuselage sides at the locations shown
on the plan. Do not glue the hatch keys to the
fuselage sides.
Q 11. With the hatch keys flush or slightly higher
than the fuselage sides, put a bead of thick CA
along the top of the hatch keys. Place the hatch in
position and hold it in place until the glue cures. Do
not glue the hatch keys to the fuselage sides.
Ql 12. Remove the hatch and glue the hatch tongue,
cut in step 6, centered on the front of the hatch.
[-1 13. After the glue has cured, test fit the hatch on
the fuselage and lock it in place with the hatch tab.
U 14. Carve and sand the hatch, filler block, nose
block and 3/16" bottom sheeting to shape as
shown in the G-G cross section on the plan.
LJ 15. Cut the two pushrod exit slots at the aft end
of the fuselage. Make sure the lower slot (rudder) is
on the right side of the fuselage. The upper slot
(elevator) is on the left side of the fuselage.
d 16. Sand the bottom of the fuselage, blending
the 3/16" bottom forward sheeting into the 3/32"
bottom aft sheeting. Use the cross sections shown on
the plan as a guide to sand a radius on the corners.
Be careful not to sand the corners too thin and
weaken the structure. Sand a radius on the 1/4"
end cap.
LJ LJ 1. Lay the right wing plan on your building
board and cover it with Plan Protector or wax paper.
Q Q 2. Before removing the die-cut 3/32" balsa
ribs from the die sheets, label each rib using the die
patterns on page 7.
Q Q 3. Stack the W-1 through W-3 ribs together.
Insert the 1/2" x 3/8" x 24" basswood main spar in
the slot of the ribs. Lightly sand the leading and
trailing edges flush.
Q Q 4. Test fit the wing spars in all the ribs and
trim the slots as necessary. Important: The slots in
the bottom of the W-1 ribs are 1/16" shallower than
the spars. This is to allow the 1/16" sheeting to fit
between the spars, flush with the top of the spars.
U U 5. Pin the shaped 5/16" x 15/16" x
balsa trailing edge to the building board. Make
the front of the trailing edge and the tip end
aligned with the wing plan. The root end
24"
sure
are
will
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