Airplane Factory SLING 2
Pilot Operating Handbook
Page | 7-24
DC-POH-002-X-B-6
Revision : 2.6
Charge system
For aircraft fitted with the 912 iS engine refer to the applicable supplement
at the end of this manual.
For aircraft fitted with the 914 UL engine refer to the charge system
electrical diagram in the applicable supplement at the end of this manual.
The charge system wiring / operation for the 914 UL equipped aircraft is
similar to that of the 912 ULS equipped aircraft and the following
description applies.
Refer to paragraph 7.17.1. The alternating current (AC) output of the engine
driven alternator is routed to a rectifier / regulator where it is converted
(rectified) and regulated, to provide direct current (DC) output available to
the aircraft systems (e.g. to charge the main battery). Charge system output
is approximately 13.5 to 14 V DC (from 1000 ±250 rpm and higher).
The charge system output is connected to the battery. Refer to paragraph
7.17.1. The main bus is connected to the battery via the master switch,
power is also supplied to the main bus via the starter relay and key.
Alternator failure indication
For alternator failure indication / indicators on 912 iS equipped aircraft
fitted with the 912 iS engine please refer to the applicable supplement at
the end of this manual.
For aircraft fitted with 912 ULS or 914 UL engines the electrical system
incorporates an AC generator (alternator) / charge warning light (labeled
CHARGE) located on the upper left side of the instrument panel (refer to
paragraph 7.10). The light should illuminate if there is an AC generator
(alternator) failure. The main bus / system voltage (indication on EFIS) could
show a reduced reading.