Mount The Stab & Fin - GREAT PLANES Piper J-3 Cub Instruction Manual

Mount the Stab & Fin
❏ 1. Use a fresh #11 blade to trim the covering from the
slots in the aft end of the fuse for the stab and fin.
❏ 2. Measure the Stabilizer and accurately mark the center
with a felt-tip pen. Use a 90-degree triangle to mark a
vertical centerline across the mark you made.
❏ 3. (Refer to this sketch while you align the stab.) Slide the
stab into the fuse. Align the centerline you marked with the
slot for the fin. Measure the stab on both sides of the fuse
to make sure it is centered (A=A).
❏ 4. Remove your cowl if it's on the fuselage. Insert a T-pin
into the bottom center of the firewall in the front of the
fuselage. Tie a small loop at one end of a 42" [1070mm]
piece of monofilament string and slip it over the T-pin.
❏ 5. Fold a piece of masking tape over the other end of the
string and draw an arrow on it. Slide the tape along the string
and align the arrow with one end of the stab. Swing the string
over to the other end of the stab, while keeping the stab
centered in the fuselage. Shift the stab and slide the tape
along the string until the distances between both ends of the
stab and the front of the fuse are equal (B=B). Now your stab
is centered and square with the fuse.
❏ 6. Use a felt-tip pen to mark the sides of the fuselage
on the top and bottom of the stab. Remove the stab from
the fuselage.
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