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Section 8: Installing the Rudder, Control Horns, and Linkages
Step 5. Using a Moto-tool and a cut-off wheel, cut the bolt on
the side with the head so that 1" of thread is exposed.
Step 6. Thread an A-nut (included with swivel clevis) onto each
side of the threaded rod and securely tighten against the rudder.
Step 7. Screw a molded swivel link onto each side of the
8-32 threaded rod so that it is tight against the A-nut.
Step 8. Hinge the rudder using the same techniques as with the
aileron and elevator.
Step 9. Remove the stock servo arms and replace them with
heavy-duty 1
1
/
" arms. The arms need to be positioned as
4
shown below.
Step 10. Screw a 4-40 ball link five to six turns onto a
4
1
/
" long 4-40 linkage. Screw the opposite end of the linkage
2
into the swivel control horn that was installed in Section 7.
Adjust the length until the hole in the ball link lines up with the
outer hole in the servo arm when the rudder is in neutral and the
arm is centered.
Step 11. 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.
Step 12. Repeat Steps 10 and 11 for the other rudder servo.
CONTINUED
23
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