Rotax 912 i series Installation Manual

d05785.fm
INSTALLATION MANUAL
BRP-Powertrain
Effectivity: 912 i Series
Edition 1/Rev. 2
75-00-00
Page 19
January 01/2014
4.2) Cooling air ducts (optional)
General note Cooling air ducts are not required if the oil and coolant temperatures are
within the prescribed operating limits. Otherwise following measurement
must be performed for the first installation of an aircraft type (not in serial
production).
Hot day condition See Fig. 10.
In contrast to the cylinder heads, the cylinders are ram air cooled. Plan
the cooling air ducts according to installation requirement.
Max. permitted cylinder wall temperature on hottest cylinder...200 °C
(392 °F)
NOTE: If this temperature is exceeded, appropriate measures
(e.g. cooling air ducts, modifications to cowling, etc.) must
be taken to bring it within limits again.
Graphic Measuring point for Hot day condition
Fig. 10

WARNUNG

WARNING
Non-compliance can result in serious injuries or death!
The cooling air ducts must be designed and built such
that the operating temperatures are within the speci-
fied limits and maximum values are not exceeded.
This must also apply to "Hot day condition".

Rotax 912 i series Specifications

General

Number of Cylinders	4
Max Power	100 hp (73.5 kW)
Max Power Output RPM	5800 rpm
Ignition System	Dual electronic ignition
Oil System	Dry sump, forced lubrication with separate oil tank
Reduction Gear Ratio	2.43:1
TBO	2000 hours
Engine Type	4-stroke, horizontally opposed
Displacement	1352 cm³
Bore x Stroke	84 mm x 61 mm
Max Torque	128 Nm
Fuel Type	Avgas 100LL or unleaded automotive gasoline
Fuel System	Electronic fuel injection
Cooling System	Liquid/air-cooled