Determination Of Operating Limits, Coolant And Necessary Modification On Radiator Installation - Rotax 914 series Installation Manual

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.
maximum values for
Coolant
temperature
less than
120 °C (248 °F)
more than
120 °C (248 °F)
less than
120 °C (248 °F)
more than
120 °C (248 °F)
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:
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.
Effectivity: 914 Series
Edition 2 / Rev. 0
BRP-Rotax
INSTALLATION MANUAL
Cylinder head
Conventional coolant
temperature
Additional instruments for
less than
135 °C (275 °F)
temperature is necessary
less than
135 °C (275 °F)
Cooling capacity too low.
Check of the installation
more than
135 °C (275 °F)
more than
135 °C (275 °F)
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.
coolant used for tests
displaying coolant
b)
necessary
c)
Waterless coolant
Modifications to the instruments
or limit not necessary
a)
Cooling capacity too low. Check
of the installation necessary
c)
July 01/2008
07818
page 48