Aileron Control System; Control Stick; Control Stick, Fork And Torque Tube Removal; Control Stick, Fork And Torque Tube Installation - THRUSH S2R – G10 Maintenance Manual

WARNING
FAILURE TO STAY WITHIN
CONTROL SURFACES STATIC
BALANCE LIMITS
LEAD TO CONTROL SURFACE
FLUTTER, WHICH
LEAD TO LOSS OF AIRCRAFT,
LIFE, AND/OR PROPERTY.

AILERON CONTROL SYSTEM

CONTROL STICK

Ref. Figure 7-1
The control stick is attached to the torque
tube with bushings and bearings so it
can move fore and aft relative to the
torque tube. The torque tube is attached
to the cockpit floor through bearings so
that it can rotate about the aircraft
longitudinal axis. The control stick fork
thus moves with two degrees of freedom.
A series of push rods, push tubes and
bell cranks form
between the control stick and the
ailerons. The control stick activates the
elevators through push tubes, a bell
crank, an idler and the elevator horn.
The control stick forks and torque tube
may be removed for replacement of
bearings and bushings.
Control Stick, Fork and Torque Tube
Removal
Remove the external side skins at the
cockpit and the control stick dust cover
base assembly.
procedure to replace the bearings.
A. Disconnect the aileron push rods
and elevator push tube.
B. Remove the attaching hardware
securing the control stick fork to the
torque tube.
C. Withdraw controls stick and fork from
aircraft.
7-4
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THRUSH AIRCRAFT, INC – MODEL S2R-G10
AIRCRAFT MAINTENANCE MANUAL
!
COULD
COULD
solid connections
Use the following
D. Remove the bolts securing the torque
tube to the pillow blocks. (See Fig. 7-1)
E. Remove the torque-tube from aircraft.
Control Stick, Fork and Torque Tube
Installation
A. Install bearings on the torque tube and
in the control stick forks as required.
B. Install torque-tube in the pillow blocks.
C. Tighten pillow block hardware per torque
values in Section 2.
D. Install control sticks fork on torque tube
and tighten hardware per torque values
in Section 2.
E. Check freedom of movement on control
stick and torque tube.
F. Lubricate bearings per Section 2 of this
manual.
G. Connect the elevator push-tube and
aileron push-rods and check for proper
operation of control system.
H. Replace control stick dust cover base
assembly and aircraft side skins.

AILERON CONTROL LINKAGE

Ref. Figure 7-1
The aileron control is driven by a single push
rod from the control stick torque tube to a
vertical bell crank at the right side of the
fuselage. A short push rod connects the bell
crank to a vertical idler in the left side of the
fuselage. In each wing, the inboard push
tubes connect between the bell crank and
idler in the fuselage to the aft side of a bell
crank near the inboard end of the aileron.
From the forward side of this bell crank, the
outboard push tube connects to the forward
arm of the drive bell crank located at the
aileron mid span. The short arm of the drive
bell crank is connected to a push rod that
drives the aileron.
connected to the rudder controls by spring-
loaded cables that enable the ailerons to be
activated in conjunction with the rudder (Ref.
Figure 7-2). This provides a safety factor in
The ailerons are also
Effective: 03/26/2010