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OPERATING AND MAINTENANCE MANUAL FOR ULTRALIGHT AEROPLANE
2.1.2. Power plant
Engine
The ROTAX 912 UL is 4-stroke, 4
cylinder, horizontally opposed, spark
ignition machine, one central camshaft –
push – rods – OHV. Liquid cooled
cylinder heats, ram air cooled cylinder.
Dry sump forced lubrication. Dual
breaker less capacitor discharge ignition.
Engine electrical system consist of 10-
poles single –phase generator, ignition,
electric
starter,
V battery. The coolant is forced trough
is forced through the radiator by a water
pump, driven from the crankshaft to
cylinder heads. From the top of cylinder
heads the coolant passes on the expansion tank which allows for coolant expansion. The
expansion tank is closed by a pressure cap with excess pressure valve and return valve. When
the temperature vises the coolant creating excess pressure, a relief valve opens and the
coolant flows through a hose to the overflow bottle mounted on the firewall.
The engine is attached to the engine mount attached to the firewall with 4 bolts. The engine
mount is spring – mounted with 4 rubber shock absorber.
Engine Manufacturer........... Bombardier – Rotax GmbH Gurnskirchen, Austria.
The engine instruments:
• Engine rpm
• Engine hours
• Cylinder head temperature
• Oil temperature
• Oil pressure
Document No:
Date of issue: 30.01.2008
UFM-13 Lambada
regulator
and
12
2-2
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