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1.8 Powerplant
1.8.1 Engine
Rotax is an Austrian engine manufacturer, founded in 1920 inDresden, Germany. In 1970 Bombardier bought Rotax. The
company constructed only two-stroke engines until 1982, when it started building four-stroke engines. In 1989, Rotax
received Type Certification for its 912 A aircraft engine.
The Rotax 912 ULS engine is an ASTM compliant engine. The 912 is a four stroke, horizontally opposed, spark ignition
engine with single central camshaft with hydraulic tappets. The 912 has liquid cooled cylinder heads and ram air cooled
cylinders and engine. It is rated at 5800 RPM and can be run continuously at 5500 RPM.
The oil system is a dry sump, forced lubrications system. The oil tank is located on the passenger side of the engine
compartment and holds 3 liters (3.2 quarts) of oil.
The dual ignition system is a solid state, breakerless, capacitive discharge, interference suppression system instead of a
mechanical magneto system. Each ignition system is powered by individual and totally independent AC generators which
are not dependent on the aircraft battery.
The electrical system consists of an integrated AC generator with an external rectifier – regulator. An external alternator
can be installed. The Rotax engine is equipped with an electric starter.
The dual carburetors are constant depression carburetors that automatically adjust for altitude.
The fuel system is equipped with an engine driven mechanical pump and electrical back up FACET pump.
The cooling system is a mixture of liquid and air cooling.
The engine uses a reduction gearbox with a gear reduction ratio of 2.4286:1.
A central console located throttle in the cockpit controls the engine.
The owner can register and get important information from the following website: http://www.rotax-owner.com/
.
1.8.2 Propeller
The GT propeller is a wood composite propeller built by GT Tonini in Italy. The Tonini brothers began building propellers
in 1969.
The propeller is finished with a white polyurethane lacquer and an additional layer of transparent lacquer. The tips are
painted in bright yellow and red so that when the propeller is turning it is obvious to personnel on the ground. The back of
the propeller is painted black to prevent reflections. More information on the company and the propeller can be found at
http://www.gt-propellers.com
. Check with your dealer for propeller options.
The Sensenich 2 or 3 blades propellers are also allowed to be mounted with the Sensenich provided installation kit for
Tecnam. For Propeller installation see the manufacturer’s AMM P/N 2A0 (2 Blades) and 3B0R5 / 3B0R5-FD (3 Blades).
The propeller pitch must be always set following Tecnam related Job Card N° 448 (Sensenich 2/3 Blades Installation
and Settings) to ensure the pitch will not allow the airplane to fly over the maximum legal 120KCAS and in order to avoid
overspeeds which could damage the engine. More information on the company and the propeller can be found at
http://www.sensenich.com/
.
1.8.3 Fuel system
The system is equipped with two aluminum fuel tanks integrated in the wing box and accessible for inspection through two
dedicated covers. Capacity of individual tank is 52lt (13.7 gal) and total usable fuel is 104lt (27.4 gal). Each fuel tank is
equipped with a cabin installed shutoff and selector Andair valve. A strainer cup with a drainage valve (Gascolator) is
located on the engine side of the firewall. Fuel level indicators for each tank are located on instrument panel. Fuel feed is
through an engine-driven mechanical pump. All fuel lines located in the engine compartment are protected with fireproof
braiding to avoid possible fire. Figure 1-3 illustrates the schematic of the fuel system. All lines in the fuselage are made in
steel hoses to prevent leaks and damages. Fittings are AN type.
WARNING
Fuel quantity should be checked on a level surface or a false reading may result. Always visually verify fuel quantity by
looking inside the tanks during filling.
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