7-20 DESCRIPTION OF AIRPLANE AND SYSTEMS / ELECTRICAL SYSTEM
ICON A5-B / PILOT’S OPERATING HANDBOOK CHANGE A2
CHAPTER 7
NOTE: Although the propeller is ground adjustable,
ICON does not permit propeller pitch adjust-
ments.
7.12 ELECTRICAL SYSTEM
The electrical system on the A5-B is powered by the Rotax 912iSc2
Sport engine’s integrated internal alternator, charging a 12VDC,
24Ah, or 11Ah, battery located in the nose of the aircraft. The
alternator has two isolated coils, creating a redundant charging
system (a 16 amp alternator A and a 30 amp alternator B). The
engine voltage regulation is performed by two three-phase short
rectifier regulators located on the Rotax-supplied fuse box. The
output voltage of each regulator is 14.2 V ± 0.3.
During engine startup, the engine management system (EMS) is
powered by the battery. With sufficient speed, (2500 RPM)
alternator B takes over this function. After the EMS system check,
alternator A takes over the supply of the EMS system (engine), if the
switching threshold is exceeded. Alternator B is then used to charge
the battery and to power the aircraft systems, including all avionics
and instruments, exterior and interior lights, landing gear, water
rudder, flaps, pitch trim, bilge pump, cabin heat, master solenoid, two
USB outlets and a 12 VDC outlet. The outlets are located in the
center console under the armrest and have a maximum current
draw of 4.6A combined. Alternator B also powers the relay panel,
which is located aft of the baggage compartment on the RH side
and controls the logic for several of the systems listed above. Both
the battery and alternator B share the same electric bus.
7.13 EXTERIOR LIGHTING
The A5-B has navigation and strobe lights on each wing tip. In the
nose of the aircraft, there are narrow-beam, high-intensity landing
lights as well as a wide-angle, low-intensity light for taxiing. All of the
lights are controlled by switches on the center console. The aft wing
tip strobe and white navigation lights have two fences installed on
the inboard and outboard edges of the light housing.
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