page 48
July 01/2008
Effectivity: 914 Series
Edition 2 / Rev. 0
d04277
INSTALLATION MANUAL
BRP-Rotax
12.5) Determination of operating limits, Coolant and necessary modification
on radiator installation
Depending on the achieved maximum values of the cylinder head temperature and
the coolant temperature following action are necessary.
a) Maximum cylinder head temperature is below operating limit. Operating with
waterless coolant, is permissible without modification to the installation.
b) Maximum cylinder head temperature and coolant exit temperature is below
operating limit.
For operating with conventional coolant it is necessary to monitoring constantly
cylinder head temperature and coolant exit temperature.
◆ NOTE: For detection of possible indication error an additional monitoring
of the cylinder head temperature is necessary which shows an
exceeding in case of coolant loss.
The aircraft manufacturer has the option of converting the coolant temperature and
the cylinder head temperature to an aircraft specific cylinder head temperature. This
is possible by calculating the difference between the head material and the coolant
temperature.
This is done by following the flight test procedure on page 47.
Coolant
temperature
Cylinder head
temperature
Additional instruments for
displaying coolant
temperature is necessary
b
more than
135 °C (275 °F)
Modifications to the instruments
or limit not necessary
a)
Coolin
capacity too low. Check
of the installation necessary
c)
Cooling capacity too low.
Check of the installation
necessary
c)
more than
135 °C (275 °F)
less than
135 °C (275 °F)
less than
135 °C (275 °F)
less than
120 °C (248 °F)
more than
120 °C (248 °F)
less than
120 °C (248 °F)
more than
120 °C (248 °F)
maximum values for
Conventional coolant Waterless coolant
coolant used for tests
07818
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