Pipistrel Virus SW 121, Руководство по эксплуатации для пилотов

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Virus SW 121
Pilot Operating Handbook
POH-121-00-40-001
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SECTION 7
AIRPLANE DESCRIPTION
APPROVED
Cabin Air Selector
This is the shut-off valve from the firewall forward compartment into the cab-
in. The stainless steel ON/OFF valve is controlled by a push-pull knob on the
bottom of the switch panel, next to the battery disconnect ring. Pull to open,
twist to lock, push to shut. Make sure the Cabin Air Selector is open before
using the Cabin Heat System.
Cabin Heat System
The cabin heat system is composed of a stainless steel heat muff fastened to
the exhaust system muffler that serves as the system’s source of hot air. Air
from the oil cooler enters the engine bay and is directed into the heat muff.
Hot air leaving the heat muff is then directed through scat tubing to a mixer
where it meets fresh air coming from a NACA inlet positioned on the upper
engine cowling. The mixer regulates the fresh/hot air ratio passing through
the cabin air selector, which is fastened to the aircraft’s firewall. The system
is controlled from the cabin by a cabin heat panel.
The cabin heat panel is positioned on the instrument panel and allows the pi-
lot to control, via rotary knobs and toggles switches, the temperature (fresh/
hot air ratio), the flow (fan on/off) and where (cabin or windshield) the air
entering the cabin should go.
The following are the offered control possibilities:
Airflow direction
The bottom knob on the cabin heat system panel controls the direction of
airflow, either towards the windshield (rotate left) or towards pilot’s feet (ro-
tate right). Any setting inbetween these two results in air flowing in both
directions.
Heating
The upper knob on the cabin heat system panel controls the temperature of
the airflow. Rotate left for cooler and rotate right for warmer. Maximum cold
position will result in external ambient being delivered to the cabin. In this
case the system serves as an additional source of fresh air. Maximum hot
position will only let the hot air from the exhaust muff into the cabin.