General Directives For The Cooling System - Rotax 914 series Installation Manual

12.9) General directives for the cooling system

See Fig. 28.
BRP-Rotax offers essential parts of the cooling system for this engine such as radiator,
etc..
▲ WARNING: Certification to the latest requirements to FAR or EASA has to be
Fig. 28
08320
In an installation as depicted with the radiator (9) in a higher position than the
standard supplied expansion tank, a water accumulator (10) has to be fitted instead
of the expansion tank. Additionally a suitable expansion tank (1) has to be installed
at the highest point of the cooling circuit.
■ CAUTION:
◆ NOTE:
Effectivity: 914 Series
Edition 2 / Rev. 0
BRP-Rotax
INSTALLATION MANUAL
conducted by the aircraft manufacturer.
9
The size and type of radiator should be adequate to transfer
thermal energy of approx. 30 kW (28 BTU/s) at take-off power.
Assessment data by experience. For troublefree operation at good
airflow a radiator of at least 500 cm
The flow rate of coolant in the cooling system is approx. 60 l/min
(16 US gal/min) at 5800 rpm. As reference value for the necessary
cooling airflow approx. 0,75 m³/s at full load can be assumed.
The flow resistance of the coolant in the optional ROTAX-radiator
is properly designed for the cooling system.
Check flow rate and cooling capacity if other radiators are used.
1
10
2 2
(78 in ) area has to be used.
page 57
July 01/2008