Rotax 912 i Series Installation Manual page 115

4) General notes on the cooling system
Certification
Essential parts of the cooling system, such as radiator, etc., are available
for this engine from BRP-Powertrain.
Radiator
NOTE:
The flow rate in the coolant circuit is approx. 60 l/min (15.85 USgal/min.) at
Flow rate
5800 rpm. At full throttle, an approximate value of around 0.75 m
(28.59 cu.ft/sec) can be assumed for the required cooling air flow.
The flow resistance of the coolant in the optional ROTAX radiator is cor-
Flow resistance
rectly adjusted for the cooling system.
If using other radiators, check the flow rate and cooling capacity.
No provision has been made for attachment of the radiator(s) on the
Installation of
the radiator
engine (rubber mounts are recommended).
4.1) Coolant capacity
4 cylinder heads ......................................... 560 cm
Coolant pump............................................. 100 cm
Expansion tank........................................... 250 cm
2 m coolant hose (inner
Total coolant quantity for engine ................ approx. 1.5 l (0.4 USgal)
Effectivity: 912 i Series
Edition 1/Rev. 0
BRP-Powertrain
INSTALLATION MANUAL
Non-compliance can result in serious injuries or death!
WARNING WARNUNG
Certification according to the latest regulations, such
as FAR or EASA, must be conducted by the aircraft or
fuselage manufacturer.
The radiator must be designed to dissipate approx.
NOTICE
WARNUNG
30 kW (7.58 BTU/s) of thermal energy at take-off per-
formance.
Experience has shown that with good airflow, a radiator with
an area of 500 cm² (77.5 in²) is required for troublefree op-
eration.
The radiator must be installed without distortion or
NOTICE
WARNUNG
stress and free of vibrations. If a GENUINE
ROTAX radiator is not being installed, ensure suffi-
cient cooling capacity.
Ø
18 mm).............. 500 cm
3 /s
3
(0.02 cu.ft)
3
(0.004 cu.ft)
3
(0.008 cu.ft)
3
(0.018 cu.ft)
75-00-00
Page 17
January 01/2012