Using a cutter, open up a small hatch above the
servo opening on the upper rudder mount
platform in order to access the servo arm. See
photo. Make up two servo linkages of exactly
the same length.
Install linkages on to the servo arms and
bearing box control arms.
Check to make sure horizontal stabs have full
movement on both top and bottom. Adjust
and trim material around the stab control arm
as needed to achieve full throws.
Test fit the vertical stab in place. You may
need to trim the lip around the bottom of the
opening to provide control arm clearance.
Check linkage cover for adequate clearance.
FB Su-27
Page 8
