Rudder Rigging; Rudder Trim Tab; Balance Cable Rigging; Elevators - THRUSH S2R – G10 Maintenance Manual

AIRCRAFT MAINTENANCE MANUAL

RUDDER RIGGING

Ref. Figure 7-6
A. Position the rudder pedals at mid-
adjustment position
adjustment channel.
B. Center and lock the rudder.
C. Adjust the turnbuckles in each
rudder cable, at fuselage station
175.12, to bring the rudder pedals
approximately 11.00 inches from the
back of the hopper.
* NOTE *
If the turnbuckles run out of
adjustment,
adjustment strap on rudder
horn to shorten cable.
D. Safety-wire the turnbuckles using
0.041 stainless steel wire.
E. Adjust and lock the rudder stop bolts,
located at the base of the rudder
post, to limit the travel of the rudder
to 19±1º left and right of center.

RUDDER TRIM TAB

A fixed-position trim tab is attached to the
lower edge of the rudder. An out-of-trim
rudder can be trimmed by bending the
metal trim tab. Use forming blocks when
bending tab and do not bend more than
0.50 inch deflection in either direction.

BALANCE CABLE RIGGING

The Thrush incorporates a rudder-aileron
balance cable/spring system.
cables are attached to the rudder pedals
and routed out of the cockpit and to the
spring which is attached to the opposite
aileron bell crank.
accomplished with
located on each cable. The system is
correctly adjusted when the rudder and
ailerons simultaneously align in the
neutral position. Ensure there is no
contact between balance springs.
7-12
Page
THRUSH AIRCRAFT, INC – MODEL S2R-G10
in the
relocate the
The
Adjustments are
the turnbuckles

ELEVATORS

Ref. Figure 7-7 & 7-8
Each elevator is attached to the rear spar of
the horizontal stabilizer at two hinge points.
The control stick is connected to the
elevators through the use of a belcrank,
idler, push tubes and elevator horn.
right and left elevators are attached to a
common elevator horn and hinge.

ELEVATOR DOWN SPRING

The elevator system has a down spring
attached to the elevator bell crank via a
cable from the top. The cable goes around
a pulley to the spring which is attached back
to bell crank support bracket. The cable and
spring are connected with a turnbuckle for
final adjustments. With the flaps up and the
elevator in neutral,
assembly is clamped to flap torque tube at
48 from center on fwd side. Rig the cable
to obtain a spring length of 39". The dual
cockpit elevator balance spring is connected
to the lower portion of the forward elevator
bell crank and to the left lower longeron at
fuselage station 193.43. With flaps up and
elevator neutral, adjust the turnbuckle so
that the dual cockpit spring is 36 inches in
length.

ELEVATOR REMOVAL

A. Disconnect aft push tube from elevator
horns.
B. Disconnect the trim tab push rods at
elevator trim-tab.
C. Remove hardware attaching both of the
elevators horns together.
D. Remove all hinge bolts from leading
edge of elevator.
E. Remove the elevator from aircraft.

ELEVATOR INSTALLATION

A. Position elevator on aircraft.
B. Attach the elevator to the horizontal
stabilizer hinges.
The
the pulley stand
Effective: 03/26/2010