BRP-Rotax
INSTALLATION MANUAL
During engine start (dynamic condition, transient), the two circuits are connected to each
other.
When the engine is running or when the engine is turned off ( and the Fusebox is not sup-
plied with external power), the EMS circuit is electrically isolated from the rest of the
aircraft.
Therefore, the following components need to be installed without any contact to the air-
frame ground:
• ECU
• Regulator A (mounted on Fusebox)
The engine block must be connected to the airframe using a properly sized ground strap
(minimum the same cable cross section as the starter supply but at least 10 mm
2
), for car-
rying the starter current and to avoid static electricity between the engine and the
airframe.
To gain full lighting strike compliance the rubber shock mounts must be bridged by using
ground straps (min. 10 mm
2
).
BATTERY
NOTICE
The use of rechargeable batteries with lithium–ion technology should only be
used in combination with a suitable battery management system. If such an bat-
tery is used, the responsibility is up to the aircraft manufacturer. The approval of
the relevant aeronautical authority may be necessary. For installation of lithium-
ion batteries refer e.g. to FAA AC No: 20-184
The specification of the battery must ensure that during each operating state and also dur-
ing the transition between two operation states a sufficient supply of the avionics is guar-
anteed (e.g. during engine start). Depending on the applicable regulations avionics need
to be supplied for at least 30 minutes with energy after a failure of the primary power sup-
ply in case they are required for safe operation of the aircraft.
If the aircraft is regularly started at temperatures below - 5 °C (23 °F) (ambient- and oil/
coolant temperature are below this temperature) it is recommended to provide a connec-
tion for an external power supply and a possibility for adequate engine pre-heating.
NOTICE
If all consumers are active, take care not to discharge the battery deeply.
Following battery specifications are recommended:
916 i TYPE A
Effectivity: 916 i A / C24
Edition 0/Rev. 1
24–00–00
Page 21
December 01 2023
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