OPERATION MANUAL
SILA 450 c
AERO EAST EUROPE
Date 01.09.2015.
Revision 00
Page | 47
AIRPLANE & SYSTEMS DESCRIPTION
7.13 COOLING SYSTEM
The engine is cooled through air, oil and liquid. Oil and water radiators are present as well as
an air intake for engine cooling entering through the openings in the front of the engine
cowling. The cooling air is directed around the cylinders and other areas of the engine by
baffling, and is then exhausted through an opening at the bottom aft edge of the cowling.
No manual cooling system control is provided. Constant monitoring of oil and water
temperatures according to the engine manuals is necessary.
As for the liquid cooling system this is designed for the cylinders heads where a closed circuit
with an expansion tank is previewed.
The coolant flow is forced by a water pump, driven from the camshaft, from the radiator to
the cylinder heads. From the top of the cylinder heads the coolant passes on the expansion
tank which is closed by a pressure cap with excess pressure valve and a return valve. A
transparent overflow bottle is provided in order to allow the flow to and from the bottle
itself via a hose (when cooling down the coolant is sucked back into the cooling circuit).
it is very important the constant monitoring in occasion of the pre-flight inspections verifying
eventual leaking, or critical points as the connections along the pipeline; more no contact
points between the engine parts must be in the potential condition to impair trough
vibrations any element of the pipeline including the radiator. Inspect carefully the
connection between the pump and the hose.
7.14 PROPELLER
The airplane equipment varies according the following:
Wooden two-bladed fixed-pitch.
Wood & Composite Three-bladed variable on ground-pitch.
Wood & Composite Three-bladed variable –pitch in flight.
Wood & Composite Three-bladed variable –pitch in flight with governor constant
speed.
Composite Three-bladed variable –pitch on ground.
Composite Two-bladed variable –pitch in flight.
It is recommended to clean the propeller blades (always before the flight) or in any case
when is possible. The airplane is equipped with a two or three-bladed, fixed-pitch or variable
pitch, one-piece forged aluminum alloy propeller, which is anodized to retard corrosion or
wood propeller covered with composite or completely in carbon. The propeller diameter is
between 165cm to 175cm(for more information’s check propeller manual).
7.15 FUEL SYSTEM
The airplane is equipped with a standard fuel system. System consists of two vented
removable aluminum fuel tanks (one tank of 45Litres each wing), a tow-position selector
valve, fuel strainer, (10Litres reserve tank with sensor, sender and panel red light wit tester
button
)**optional
, drain bowl with drain valves for fuel (and air
**optional
), electric pump with
pressure gauge
**optional
, mechanical pump, two carburetors and return line.