Rotax 503 UL DCDI - Description of Systems; Cooling System

d04093
page 9 - 1
Jan. 01/2007
Effectivity: 447 SCDI, 503 DCDI
OM Edition 1 / Rev. 0
BRP-Rotax
9) Description of systems
9.1) Cooling system
9.1.1) Cooling system of ROTAX 447 UL SCDI and of ROTAX 503 UL
DCDI
Two versions of air cooling are available.
9.1.1.1) Free air cooling
Engine cooling by air-stream generated by aircraft
speed and propeller.
9.1.1.2) Fan cooling
Cooling in air-stream generated by fan.
The fan is permantly driven from the crankshaft
via a V-belt.