Pilot’s Operating Handbook
AQUILA AT01-100C
Section 7
AIRCRAFT DESCRIPTION
Document Nr.:
Issue:
Supersedes Issue:
Date:
Page:
FM-AT01-1010-103
A.08
A.06 (01.06.2018)
25.05.2020
7 - 19
7.14 ELECTRICAL SYSTEM
The AT01-100 is equipped with a 12 V direct current (DC) electrical system that is
powered by an engine-driven alternator and a battery. When the
ALT1 / BAT
switch is
engaged, the electrical equipment can be operated and controlled by rocker switches
located on the lower left section of the instrument panel. All electrical circuits are
protected by circuit breakers that are accessibly arranged on the right hand section of
the instrument panel.
The engine ignition systems are independent of the aircraft power supply system.
7.14.1 Power Supply and Battery System
The 12 V lead-acid battery (capacity depending on type installed) is connected to the
electrical system of the aircraft via a 50-amp circuit breaker and the
ALT1 / BAT
switch.
With the engine operating, the battery is charged by a 40-amp alternator that is
equipped with an internal regulator and protected by the 50-amp alternator (
ALT1
)
circuit breaker. The alternator is air-cooled and driven by a V-belt drive geared down
from the propeller shaft.
If the alternator regulator fails, the red alternator warning light
ALT1
located in the
annunciator panel will illuminate.
The charging current of the battery is monitored by the amperemeter in the MVP-50P-
AQ which also displays aircraft voltage level. In an emergency, the battery is able to
supply all essential electrical equipment for at least half an hour, provided that the
battery is correctly maintained and in a good condition.
7.14.2 Ignition System and Starter
The engine is equipped with 2 electronically controlled ignition systems that have two
independent ignition circuits. The ignition system is activated by the ignition switch. An
internal control unit interrupts the ignition if the propeller speed drops below 100 RPM.
With the ignition key in the R or L position, an ignition circuit is deactivated. In the BOTH
position, both ignition circuits are active. When the key is turned to the START position,
the starter motor is activated. When the key is released it returns to the BOTH position
and the starter is disengaged.
Further information for engine operation and pre-flight checks are contained in the
Operator’s Manual for all versions of ROTAX
®
912 engines.
