Pipistrel Virus SW 121, Pilot Operating Handbook

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7-9
Virus SW 121
Pilot Operating Handbook
POH-121-00-40-001
PAGE REV. 0
PAGE
SECTION 7
AIRPLANE DESCRIPTION
APPROVED
7.4 LANDING GEAR
7.4.1 MAIN GEAR
The landing gear is a conventional, fixed tricycle type. The main landing gear
consists of a single composite landing gear strut made of glass fibre. The
strut is composed by two parallel elements producing a semi-redundant
structure and allowing for predictable locations of stress points. The tube-
less type wheel tire is 4.00 x 6. Wheel track is 1.60 m, wheel base 1.58 m.
Inflate to maximum 3.0 bar.
7.4.2 NOSE GEAR
The nose landing gear is supported from the main engine frame. The nose
landing gear is steerable, connected to the rudder pedal control system and
incorporates an oil-spring damper element. All wheels are equipped with
aerodynamic fairings made of CFRP. The tube-type nosewheel tire is 4.00
x 4. The nose gear is steerable. It is always connected to the rudder pedal
control system. The suspension is a spring-type oleo-strut. The main tube of
the strut and the fork are made out of aluminum. The inner tube is made out
of crome plated steel. Inflate to maximum 2.5 bar.
7.4.3 BRAKE SYSTEM
The main wheels are equipped with hydraulic disc brakes. Right and left
brake are independent and activated by tip brakes on each set of rudder
pedals. A parking brake in form of a center console lever accessible to both
pilots is installed.
The brake system consists of a master cylinder for each rudder pedal, two
hydraulic fluid reservoirs, a parking brake valve, a single disc brake assembly
on each main landing gear wheel, and associated hydraulic plumbing. Brak-
ing pressure is initiated by depressing the lever on top of a rudder pedal (toe
brake). The brakes are plumbed so that depressing either the pilot’s or copi-
lot’s left or right toe brake will apply the respective (left or right) main wheel
brake. The reservoir is serviced with DOT-4 hydraulic fluid.
Brake system malfunction or impending brake failure may be indicated by a
gradual decrease in braking action after brake application, noisy or dragging
brakes, soft or spongy pedals, excessive travel, and/or weak braking action.
Should any of these symptoms occur, immediate maintenance is required. If,
during taxi or landing roll, braking action decreases, let up on the toe brakes