Hangar 9 J-3 Piper Cub Instruction Manual page 16

Section 5: Installing the Horizontal
and Vertical Stabilizer
Step 5. With the fuselage resting on a flat surface, align the
horizontal stabilizer by measuring from fixed points on the wing
to the outside of the trailing edge tip of the horizontal stabilizer.
Make sure the trailing edge of the horizontal stabilizer stays on
its center mark.
Step 6. Adjust the horizontal stabilizer until you have an equal
distance on both the right and left side of the fuselage and that
the horizontal stabilizer is positioned correctly (not tilted) with
reference to the wing. Refer to the illustration below.
16
Correct
Incorrect
Step 7. When you're satisfied with the alignment of the horizon-
tal stabilizer with the wing, carefully mark the position with a
pencil at the junction where the horizontal stabilizer meets the
fuselage. The pencil should leave a slight indentation in the cov-
ering. Mark both the top and bottom of the horizontal stabilizer.
Step 8. Trial fit the vertical stabilizer in place on the fuselage,
after removing the rudder and hinges. Set these aside for now, as
the rudder will be attached later in Section 8. Make sure the ver-
tical stabilizer is inserted completely. Some trimming to the bot-
tom of the vertical stabilizer may be required.
Note: The back of the vertical stabilizer needs to be aligned
with the back of the fuselage.
CONTINUED