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Virus SW 121
Pilot Operating Handbook
POH-121-00-40-001
PAGE REV. 0
SECTION
7
AIRPLANE DESCRIPTION
APPROVED
The nose wheel is part of the yaw control system and is moved whenever the
pedal is pressed. Cables for nosewheel steering run from the bellcranks be-
hind the seats forward to the nosewheel hinge element, where a anti-shim-
my damper is also connected to.
7.3.5
WING FLAPS CONTROL SYSTEM
There are no separate flap control surfaces in place. Function of flaps is
achieved through symmetric deflections of the flaperons.
The flaps are hand activated through a lever common to both pilots, located
between the seats. The handle is spring locked in 4 positions, correspond-
ing to flap deflections of -5°, 0°, +9°, +20°. The positions are denominated (-),
(0), (+1), (+2) respectively. The thumb-lock button prevents inadverted handle
movement. The backside of the flap handle connects to the main flaperon
bell-crank.
7.3.6
AIRBRAKES CONTROL SYSTEM
Schempp-Hirth Style airbrakes are activated by a ceiling mounted pull-lever
requiring the thumb-trigger to be released for opening. The lever is connect-
ed to the wing-side of the push-rod mechanism via self-fitting coupling. A
bell-crank fitted into the wing just aft of the main spar near the root-rib con-
verts rotary motion introduced by the cockpit lever into translational motion
required to open and close the airbrakes.
7.3.7
ELEVATOR TRIM SYSTEM
Spring type elevator trim is activated by a linear servo motor assembly locat-
ed behind the luggage compartment. The motion of the linear servo is con-
trolled through a cockpit switch and an integral position sensor. Trim position
is indicated with discrete steps on a dedicated LED display adjacent to the
trim switch as well as a gauge in the G3X PFD.
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