Cut a servo mounting plate for the dimensions of your
servo. Length should be approximately 75 mm. Cut
the width to fit. It will taper slightly from fore to aft.
Glue the servo plate to the rails, centering the servo
hole with the access hole in the stab saddle. Use a
generous amount of V-poxy to secure the plate and
also reinforce the joints where the hardwood strips
meet the fore and aft formers.
Servo plate V-poxied to mounting rails. Note bead of glue along plate to
fuse joint.
This completes the modification required to earlier
kits.
Mount servo to mounting plate and connect to Match-
maker or receiver. Center servo and attach servo arm
with bolt.
Temporarily fit upper vertical stab to fuse.
Add rudders and recheck fit. When satisfied, inject a
generous amount of V-poxy into the hinge point holes
in the vertical fin structure. Refit rudders and U
bracket, reinstall steel straps and the servo arm, make
a final check for adequate movement from side to side
and set aside to dry.
Inject V-poxy into hinge holes and assemble upper vertical stab, rudders,
U bracket and steel straps and allow to dry.
Twin pushrods were fabricated from 2-56 rod with
threaded ends. Z bends are used to connect the rods
to the U bracket and clevises are threaded on to the
rods for attachment to servo arm. Carefully measure
length with components assembled as shown above
and then fabricate the pushrods.
Remove U bracket and attach pushrods. Reassem-
ble. Add clevises and attach to servo arm making
sure both sides are equal and the servo arm is cen-
tered. It is important to have the vertical stab installed
as shown as the tilt of the U bracket will affect the re-
quired length of the pushrods.
Construction Manual
Der Jet F9F-8 Cougar Page 13
