If you know your way around a soldering iron, you may choose to more
securely affix control horn to U bracket.
Current kits will have a servo mounting plate installed
in the lower vertical stab just below the horizontal stab
saddle. If this is the case, install your servo now with
the spindle forward.
Run your rudder servo extension.
Early kits were designed around a pull-pull cable sys-
tem to actuate the rudders. It is recommended that
you modify the horizontal stab as follows to position
the servo in the lower vertical stab.
As shown in the photo, cut two hardwood strips such
that they reach from the front vertical stab former to
the aft vertical stab former. You may need to trip away
a little at the aft portion to clear the vertical stab spar
clamp nuts.
Two hardwood strips approximately 15 mm square are installed between
the formers in the lower vertical stab just below the horizontal stab.
The depth of the two hardwood strips is determined by
running 2-25 linkage rods from the U bracket control
horn, through the holes formerly occupied by the cable
sheath in the aft former into the space where the
servo arm will be. Measure this distance from the
stab saddle.
To this figure, add the depth of the servo arm to the
bottom of the servo mounting tabs. Add in the depth
of the ply mounting plate to be cut out in the following
step. Mark this position on both sides of the fuse and
glue both hardwood strips in place. Measure several
times to make sure the depth is equal on both sides.
At this point, do not get any glue on the tops of the
hardwood strips, as the servo ply mounting plate
needs to sit down flush on the strips.
Construction Manual
Der Jet F9F-8 Cougar Page 12
