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TM 55-1520-240-23-9
11-1
FLIGHT CONTROLS
(Continued)
11-1
First and Second Stage Controls
The first stage controls are above the closet controls
between sta. 95 and 120. The second stage controls
are aft of the forward transmission mounting structure.
The first and second stage controls are connected
by four connecting links. The first and second stage
controls consist of bellcranks and linkage which mix
inputs from the thrust, pitch, roll, and yaw closet control
motions into two motions. These two motions are
transmitted directly to the forward and aft controls.
Forward Upper Controls
The forward upper controls are forward of the second
stage controls on either side of the forward transmission.
Links and bellcranks direct control motions to
control valves located in two dual servocylinders.
The servocylinders are connected to the forward
transmission and the controllable swashplate. A
longitudinal cyclic trim (LCT) actuator, yoke, and fixed
link are part of the forward flight controls, and are located
on the aft side and below the forward swashplate. The
LCT actuator is controlled by manually applied electrical
inputs from the cockpit or by the advanced flight control
system (AFCS).
11-5
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