Rotax 912 Series Installation Manual

d04924.fm
INSTALLATION MANUAL
BRP-Powertrain
Effectivity: 912 Series
Edition 2/Rev. 0
75-00-00
page 13
August 01/2012
2.1) Determination of operating limits, Coolant and necessary modifi-
cation on radiator installation
Maximum values Depending on the achieved maximum values of the cylinder head temper-
ature and the coolant temperature following action are necessary:
a) Maximum cylinder head temperature is below operating limits. Opera-
ting 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 mo-
nitoring of the cylinder head temperature is necessary
which shows an exceeding in case of coolant loss.
Flight test The aircraft manufacturer has the option of converting the coolant temper-
ature 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 (page 14).
Once the calculation is made and the indicating instrument re-labelled it is
acceptable to use the cylinder head temperature as the primary cockpit
display instead of installing a sensor in the coolant flow.
Maximum values for Coolant used for tests
Coolant
temperature
Cylinder head
temperature
Conventional
coolant
Waterless coolant
less than
120 °C (248 °F)
less than
135 °C
1
(275 °F)
(150 °C)
2
(300 °F)
1. engine type 912 S/ULS
2. engine type 912 A/F/UL
Additional instruments
for displaying coolant
temperature is neces-
sary.
b)
Modifications to the in-
struments or limit not
necessary.
a)
more than
120 °C (248 °F)
less than
135 °C
1
(275 °F)
(150 °C)
2
(300 °F)
Cooling capacity too
low. Check of the in-
stallation necessary.
c)
less than
120 °C (248 °F)
more than
135 °C
1
(150 °C)
2
(300 °F)
Cooling capacity too
low. Check of the instal-
lation necessary.
c)
more than
120 °C (248 °F)
more than
135 °C
1
(275 °F)
(150 °C)
2
(300 °F)

Rotax 912 Series Specifications

General

Redline	5800 rpm
TBO	2000 hours
Displacement	1211 cc
Bore	79.5 mm
Stroke	61 mm
Power Output	80 hp (59.6 kW)
Compression Ratio	9.0:1
Fuel Type	Avgas 100LL
Ignition System	Dual electronic ignition
Fuel System	Fuel Injected
Oil System	Dry sump
Engine Type	4-cylinder, horizontally opposed, 4-stroke