DG Flugzeugbau LS8 - Control Surfaces Free Play; Control Surfaces Friction

Maintenance Manual LS8
Issued: December 2009
Copyright DG Flugzeugbau GmbH - any copy or publishing prohibited
Manual valid with the up-to-date cover page only
5-5
5.3 Control surfaces free play
(Inspect annually)
Free play
Elevator Maximum 2.5 mm <0.1 in> at inner
edge
Aileron <*> Maximum 2.5 mm <0.1 in> at drive
Rudder Not applicable
Measuring Technique
Free play should be measured with control stick fixed to zero position.
Measure at the trailing edge of the control surface.
5.4 Control surfaces friction
(Inspect annually)
Friction
Elevator Maximum travel due to friction 50 mm <1.97
in>,
measured at top end of control stick.
Aileron
<*>
200 to 500 grams <0.441 to 1.102 lbs>
measured 30 mm below top end of control stick
Rudder Up to 500 grams <1.102 lbs>
measured at lower end of rudder
<*> Upper and lower side aileron seals must always be installed!
Measuring technique for control friction
:
Rudder friction should be measured at upper rudder edge.
Aileron friction should be measured 30 mm <1.2 in> from top end of control
stick. Values include seals.
For elevator friction travel, set trim to about zero elevator deflection. Apply
approximately 1/3 of control stick travel, then allow stick slowly to return
until it stops by itself, retarding this movement by hand. Measure final stick
position. Repeat procedure for opposite movement, difference of both
resulting positions yields travel due to friction .