d04924.fm
INSTALLATION MANUAL
BRP-Powertrain
Effectivity: 912 Series
Edition 2/Rev. 0
75-00-00
page 5
August 01/2012
1.2) Operating Limits
General note
Optional radia-
tor
When correctly installed in the aircraft, the optionally available BRP-Pow-
ertrain radiator has enough cooling capacity to keep within the standard
specified operating limits. The flow resistance of the radiator coolant is
correctly adjusted to the cooling system. The tube size must be sufficient.
Boiling point of
the coolant
Monitoring the cooling system is important for controlling engine cooling
and prevent knocking combustion within the operating limits. It is important
that the coolant circuit is designed so that the coolant does not reach boil-
ing point under any conditions. If the temperature exceeds the boiling
point, the engine can quickly overheat due to loss of coolant.
The boiling point of the coolant is mainly influenced by:
- the type of coolant
- mixture ratio (percentage water rate)
- the system pressure (opening pressure of radiator cap).
Coolant temper-
ature
Using conventional coolant:
Using waterless coolant:
Non-compliance can result in serious injuries or death!
The cooling system must be designed so that operat-
ing temperatures will not exceed the maximum values.
Coolant temperature: (coolant exit temperature)
Max. 120 °C (248 °F)
Cylinder head temperature:
912 A/F/UL Max. 150°C (300 °F)
912 S/ULS Max. 135°C (275 °F)
Permanent monitoring of coolant temperature and cylinder head tem-
perature is necessary.
Cylinder head temperature:
912 A/F/UL Max. 150 °C (300 °F)
912 S/ULS Max. 135 °C (275 °F)
Permanent monitoring of cylinder head temperature is necessary.
Additional monitoring of the actual coolant temperature is possible
but not necessary for waterless coolant.
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