E-flite Cessna 150 Aerobat 250 ARF - Manual (Page 20)

20 E-flite Cessna 150 Aerobat 250 ARF Assembly Manual
 3. Install the vertical stabilizer into the fuselage
temporarily. Use a felt-tipped pen to trace the
outline of the fuselage on the bottom of the
vertical fin.
When cutting through the covering, use a new
#11 blade and light pressure to avoid cutting
into the underlying wood, which could weaken
the underlying structure, causing it to fail in
flight. We also recommend using a hot knife
to melt through the covering to help reduce the
chance of damaging the underlying wood.
 4. Remove the vertical fin from the fuselage. Use
a hobby knife and #11 blade to trim the covering
below the lines drawn in the previous step by 1/16-
inch (1.5mm). Remove the covering, exposing the
bare wood. The lines can be removed using a
paper towel and rubbing alcohol.
 5. Place the vertical fin back in the slot on the top
of the fuselage. Use a square to make sure the fin is
positioned 90-degrees to the stabilizer. If not, lightly
sand the exposed wood on the bottom of the fin to
correct its alignment.
Do not use CA accelerator when gluing the
fin to the fuselage. The CA must be allowed
to soak into the fuselage and fin for the
best bond between the two surfaces.
 6. Once aligned, wick thin CA into the joint
between the fin and fuselage. Allow the CA to fully
cure before proceeding.
 7. Also apply a small amount of thin CA where
the tab at the front of the vertical fin fits into the
fuselage. It may be necessary to hold the fin tightly
against the fuselage until the CA fully cures.