Rotax 912 i Series Installation Manual page 117

4.2.1) General notes on the cooling air ducts
Front installa-
tion
For front installation in a closed fuselage, ducting of cooling air to the cylin-
ders is recommended. This removes the need for costly horizontal parti-
tioning (baffles).
NOTE:
BRP-Powertrain has developed a non-certified cooling air duct especially
for this application.
The following recommendations should assist the aircraft or fuselage man-
Selecting cool-
ing air ducts ufacturer in selecting suitable cooling air ducts.
Cross section of air duct
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.
It also means that the engine remains completely on the
warm side of the engine compartment and is very easy to
access. In special cases a separate cold air supply to the
air filters must be provided.
Cooling capacity
Material
Attachment options
The stated maximum permissible loads (per screw)
NOTICE
WARNUNG
are valid only if using the minimum specified thread
length, and must never be exceeded.
Thread height 18 mm (0.71 in.)).
The cooling air ducts must be designed such that they
transfer thermal energy of approx. 6 kW (5.7 BTU/s) at
take-off performance.
Cross section of air duct under the airflow baffle min.
2 2
100 cm (15.50 in ).
Glass fibre reinforced plastic or heat and fire resistant ma-
terial.
Formlocking on engine block and mounting above the cyl-
inder and the crankcase.
HINWEIS: If formlocking attachment is not suffi-
cient, additional attachment is possi-
ble using two M8 threaded lugs on the
top of the engine block.
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Page 19
January 01/2012