page 100
May 01/2009
Effectivity: 912 Series
Edition 1 / Rev. 1
d04639
INSTALLATION MANUAL
BRP-Powertrain
16.2) Requirements on the air intake system
▲ WARNING: Carb icing is a common reason for engine trouble. No imple-
ments are included in the supply volume for preheating of the
intake air.
If an airbox of not ROTAX origin is used provisions for
preheating the intake air have to be made to prevent formation
of ice in the intake system.
Preheating of the intake air will result in performance loss
because of the lower air density.
▲ WARNING: All items of the air intake have to be secured against loss.
▲ WARNING: The certification to the latest requirements such as FAR and
EASA has to be conducted by the aircraft manufacturer.
Air intake socket (1) for fresh air or pre-heated air (intake side)
outside dia. ø ........... 60 mm (2 3/8")
slip-on length ......... max. 25 mm (1")
■ CAUTION: Utilize the full slip-on length on all connection. Secure hoses by
suitable spring type clamp or screw clamp.
16.2.1) Requirements on the intake air ducting
- max. length of ducting 500 mm (20 in.)
- min. inside dia. at least outside dia. of the intake socket on airbox
- min. mean bending radius 100 mm (4")
High engine performance needs air temperature as low as possible at
air intake. Therefore the air filter should be located in a recess of the
engine cowling or separated from warm air by baffles such that fresh
air can be aspirated.
16.2.2) Airfilter
■ CAUTION: A minimum flow rate of 6,23 m
3
/min. (220 cfm) has to
be warranted for all conditions.
The pressure loss must not exceed 2 hPa.
▲ WARNING: Use only filter elements which will not tend to restrict
the flow when in contact with water.
BRP-Powertrain offers an air filter as described below.
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