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Page 7-5
Elevator Control System and Pitch Trim
The two-piece elevator provides aircraft pitch control. The elevator consists of glass fiber sandwich composite, that
produces a smooth and seamless surface. The construction of the elevator includes skin, root and tip rib. Each piece of
elevator is attached to the horizontal stabilizer by means of two hinges and one center hinge in the middle that joints
both pieces of the elevator. Each piece of elevator has a mass balance weight located in its horn. The gap between
elevator and horizontal stabilizer is sealed by the sealing tapes. Unglued sealing tapes cause a significant decrease of
the effectiveness of the control surfaces.
The elevator is controlled by control sticks through mechanical linkage consisting of push-pull rods and levers
(Fig. 7-2).
The aircraft is equipped with a manually operated pitch trim. The pitch trim system deflects the elevator. The pitch
trim consists of one carbon composite leaf spring located in the central tunnel in front of the main spar and connected
to the control stick’s torsion tube.
The pitch trim is operated by a lever on the pedestal panel with a toothed self-
locking mechanism. The trim position is indicated by the trim lever.
CAUTION
Loose or missing sealing tapes cause significant decrease of control
surface effectiveness!
Fig. 7-2
Elevator control
Содержание WT9 Dynamic LSA / Club
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