Installation Manual
UL
POWER
UL350i UL350i
F
UL350i
S
UL 350i
HPS
350i
SA
MI 350A01 Revision No: 7
Date:
2014-09-15
Page:
32
of
60
Cooling system
Cylinder head cooling:
Ram air ducts/chamber should guide the incoming air equally over the cylinders and cylinder heads.
Sufficient amount of fresh air keeps the temperatures within the limits of operation. Describe ram
air ducts and amount of air that should pass over the cylinders and cylinder heads.
Cylinder head temperature:
Max. :
180°C (356°F)
Max. continuous: 160°C (320°F)
Min.:
50°C (125°F)
Oil cooling:
Depending on the aircraft installation and climatic conditions it can be necessary to use an oil
cooler. The oil cooler should be placed in fresh airflow. For further information we refer to the
lubrication system description.
Oil temperature
Max.:
120°C (248°F)
Min.:
50°C (122°F)
Normal:
80-100°C (175-212°F)
Helicopter configuration
For helicopter configurations, as an option we can offer a forced cooling system. In this system
there is a fan fixed behind the alternator disc. The air flow generated by this fan blows into the ram
air boxes. Additional weight of this system is ca. 4 kilo. For more information, contact ULPower.
Summary of Contents for UL35Oi
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