09/11/2018
RANS S-21 OUTBOUND
TEXT MANUAL
153
RUDDER
NEUTRAL POSITION AND CABLE TENSION
1.
Remove the tailwheel chain from the tailwheel.
2.
Verify neutral position of rudder with rudder pedals neutral (visual).
3.
Change the mounting hole on the multi-hole tang at the front of the rudder cable
for course cable tension adjustments.
4.
Change the hole in which the multi-hole tang on the forward cable bolts to the
rudder pedal assembly for fine cable tension adjustments.
5.
Cable tension should be 15 to 20 lbs. measured on both cables under seats. If no
cable tension meter is available, adjust by feel.
6.
Reconnect the tailwheel cables and adjust tension by removing links in the
tailwheel chain.
DEFLECTIONS
7.
For deflection measurements move rudder pedal in cabin, hold at full travel
position and measure at rudder. Adjust stops at rudder as required.
•
Left:
28°
(Tolerance is +3.0
/ -0.0
)
•
Right:
28°
(Tolerance is +3.0
/ -0.0
)
SURFACE CLEARANCE
8.
The minimum gap between rudder and vertical stabilizer is 0.06
0” all the way.
9.
The minimum gap between rudder and tip of vertical stabilizer is 1/8
”.
OPERATIONAL CHECK
10.
Operate rudder pedals throughout full range of travel and check for:
•
Correct rudder deflection.
•
Interference of controls, linkages, cables and rudder with other
components.
•
Excessive friction.
•
Slack cables between the tailwheel cable to rudder cable attach point and
the rudder horn.