PD9B01M0 1ST ISSUE 1/07/2019 23
4.2 Engine cowling
The engine cowling is made of composite material; the upper cowl can be simply removed for
inspections. Additionally, there is an oil access door located in the upper, right-hand portion of
upper engine cowling that allows easy access to the oil fill neck/dip stick, making removal of the
cowl unnecessary during pre-flight inspections. The lower cowl is attached to the fuselage frame
but is easily removed for any necessary maintenance (see Maintenance Manual for more details).
4.3 Exhaust/Muffler system
The exhaust system is made of stainless steel. Muffler is also covered with a shroud that is used
as a heat exchanger to draw hot air for the cabin.
4.4 Air induction system
A suitable amount of air is guaranteed by the presence of different air intakes which have been
designed in order to improve their functioning during the flight operations and speed increasing.
In fact, there is a vent on the top-left (pilot view) of the engine cowling which provides air to the
engine (or directly to the airbox when this latter is installed).
Another vent is applied on the left side (pilot view), in correspondence of the engine firewall
bulkhead, with the aim to provide air into the cabin.
A very exhaustive description of the air induction system is given by the engine manufacturer in the
Engine Operators Manual.
4.5 Oil system
The oil system is an integral part of the engine, except for the cooler that is mounted on the top
right (pilot view) of the engine cooling plenum, above the engine. Moreover, the air flow is forced
by a dynamic duct that ensure a suitable air induction during the flight for best oil cooling. The oil
filler is on the right side of the engine too.
4.6 Cooling system
The cooling system is an integral part of the engine, except for the cooler that is mounted on the
bottom (pilot view) of the engine gearbox, below the engine sump.
The coolant expansion box is located in the upper engine area, just behind the gear box while the
coolant tank is located on the firewall right side (pilot view).
5 Fuel system
The fuel system is equipped with two fuel tanks integrated within the wing leading edge and
eventually an auxiliary fuel tank installed just in front of the dashboard.
In the cabin, between the two pilots, there is a fuel valve that permits the actual fuel tank selection
and also to stop the fuel flow to the engine. The fuel flows from this valve (when open) to the
gascolator which contains both a strainer screen and a drain valve.
Starting from the gascolator, the fuel passes through the electric pump/pumps that push it through
a distribution fitting towards the fuel injectors or the carburetors (see Rotax applicable EOM).
Excess fuel is routed back to the fuel valve and from it there is returned to the tank in use. Each
tank is vented to balance the internal pressure.
