7 - 10 Page Date: 22. April 2015
Section 7
Description and Operation of Aircraft and Systems
Pilot´s Operating Handbook
EXTRA 300LT
7.10.3 ENGINE INSTALLATION
The engine is supported by four shock mounts (type LORD or BARRY CONTROLS), to the
tig-welded steel tube engine mount which is attached to the fuselage with four bolts on the
firewall axis.
The engine cowling is divided into two parts, a lower and an upper part both made of glass-
fibre/carbonfibre reinforced epoxy. The parts are fixed by a number of screws and the upper
cowling has a separate hatch for easy access to the oil dip-stick.
7.10.4 PROPELLER
The standard propeller is a 3-blade wood composite, constant speed MTV-9-B-C/C 198-25 type
propeller. The propeller has a diameter of 1.98 m (77.95 in.).
7.10.5 THROTTLE
Dual control mounted on the left side of the cockpit.
7.10.6 MIXTURE
Vernier-control located at the left side of the rear cockpit (red knob).
7.10.7 RPM-CONTROL
Vernier-control on the left side of the rear cockpit.
Preselection of RPM possible due to constant speed governor (blue knob).
7.10.8 FUEL SELECTOR VALVE
Dual control. A rotary fuel selector valve is mounted behind the firewall on the right side of the
fuselage. A torque tube connects the valve to both cockpit handles. Pull and turn the handle
90° to open the valve to the Acro & Center Tank. A further 90° turn switches to the Wing
Tank fuel supply.
Position down = CLOSED
Position left = ACRO & CENTER TANK
Position up = WING TANK
7.10.9 EXHAUST SYSTEM
A complete Gomolzig 6 in 1 System with integrated silencer is installed on the 300LT.
7.11 FUEL SYSTEM
The fuel system (refer to Figure 3) consists of two separate, independent tanks:
- Acro & center tank in the fuselage
- Wing tank (LH and RH)
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