A I R C R A F T
SA 160
A I R C R A F T
A I R C R A F T
Symphony
7.43 STALL WARNING SYSTEM
or eventual system failure.
To protect the gyroscopes, the system has a vacuum relief valve that is
attached to the firewall in the cabin that is adjusted so that the vacuum
gauge will normally indicate 4.5 - 5.5 in. Hg.. This is sufficient to operate
all gyroscopes within their rated RPM. A higher setting will damage the
gyroscopes; at a lower setting, the gyroscopes could provide unreliable
information. At high altitudes (above 12.000 ft), and at low engine RPM
(for example during an approach), the vacuum gauge indicates lower
vacuum pressure. This is normal and should not be construed as a
system malfunction or an improperly adjusted vacuum relief valve.
The aircraft is equipped with a stall warning system. The signal
provides the pilot with an audible alarm to warn him that a stall
situation is developing.
The stall warning system consists of a mechanical transmitter, located
in the leading edge of the left wing and a warning buzzer behind the
instrument panel. Both are connected by electrical wires.
As the aircraft approaches a stall, the center of pressure on the upper
surface of the wings moves much forward towards the leading edge of
the wings. As a result, a micro plate located at the transmitter is
deflected upwards. A mechanical contact is made thereby sending an
electrical signal to the warning buzzer in the cockpit. The warning
buzzer gives off an alerting tone.
7.45 AVIONICS
The following provides a description of the avionics package for the
basic VFR version of the SA 160. For the SA 160 IFR version the owners
should refer to the applicable supplements provided in section 9.
(a)
Radio and Intercom
SECTION 7
DESCR. & OPERATION
Feb 25, 2005
7-52
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