Stall Warning System; Avionics Support Equipment; Audio Control Panel - Cessna 150 AEROBAT A150M Pilot Operating Handbook

CESSNA
MODEL A150M
SECTION 7
AIRPLANE & SYSTEMS DESCRIPTIONS
STALL WARNING SYSTEM
The airplane is equipped with a pneumatic-type stall warning sys-
tem consisting of an inlet in the leading edge of the left wing, and air-
operated horn near the upper left corner of the windshield, and asso-
ciated plumbing. As the airplane approaches a stall, the low pressure
on the upper surface of the wing moves forward around the leading
edge of the wing. This low pressure creates a differential pressure in
the stall warning system which draws air through the warning horn,
resulting in an audible warning at 5 to 10 knots above stall in all flight
conditions.
The stall warning system should be checked during the preflight
inspection by placing a clean handkerchief over the vent opening and
applying suction. A sound from the warning horn will confirm that
the system is operative.
AVIONICS SUPPORT EQUIPMENT
The airplane may, at the owner's descretion, be equipped with var-
ious types of avionics support equipment such as an audio control
panel and static dischargers. The following paragraphs discuss these
items.
AUDIO CONTROL PANEL
Operation of radio equipment is covered in Section
.9
of this hand-
book. When one or more radios is installed, a transmitter I audio
switching system is provided (see figure 7-10). The operation of this
switching system is described in the following paragraphs.
TRANS
COM
11--~-2
ADFI
SPEAKER
~ ~ ~ ~
elf
L
2
~
.. .
J
PHONE
LSPEAKER-PHONE SWITCH (TYPICAL)
TRANSMITTER
SELECTOR
SWITCH
Figure 7-10. Audio Control
Panel
7-31