18
Step 9.
Insert the shorter of the two tail tubes into the forward
hole in the rear of the fuselage. Insert the stabilizer with tube in
the rear hole. Carefully slide the stab onto the tube until it
touches the side of the fuselage. This may be a tight fit.
Step 10.
Install the other stabilizer onto the tube on the other
side of the fuselage. Carefully slide the stab onto the tubes until
it contacts the fuselage. When both stabs are touching the
fuselage, thread the other 4-40 socket head screw and split
washer into the top of the other stab to secure them in place.
Note:
Frequently check that these screws remain tight.
Step 11.
Remove the stock servo arms from the elevator servos
and replace them with heavy-duty 1" arms. The arms need to
face down as shown below. Be sure to use a drop of Blue
Locktite
®
on the servo arm screw if using metal geared servos.
Step 12.
Screw a 4-40 ball link 5 to 6 turns onto a 4
1
/
2
" long
4-40 linkage. Screw the opposite end of the linkage into the
swivel control horn on the elevator. Adjust the linkage length until
the hole in the ball link lines up with the outer hole in the servo
arm when the elevator is neutral and the servo arm is centered.
Step 13.
Using the 4-40 screws and nuts included in the Rocket
City package, attach the ball link to the outer hole in the arm. The
correct sequence is 4-40 screw, ball link, servo arm, and 4-40
nut. (Don’t use the spacer/ standoff.) Be sure to use Blue Locktite
®
.
Section 6: Installing the Elevator, Control Horns,
and Linkages
CONTINUED