The basic knowledge
of what a pilot must understand are the four forces of an aircraft. The
four forces are-
* Thrust
* Lift
* Weight
* Drag
Thrust
Before
an aircraft takes off, it have to gain some speed on the runway before
it is airborne. In order to achieve this, the aircraft
must have good and efficient engines in order to produce thrust, so the aircraft could accelerate
and take off. Without thrust, the aircraft will not fly.
Lift
Lift is produced by the wings of the aircraft as it accelerates
on the runway. Lift is produced due to the curved shape on the
surface of the wing.
This is how the wing of
an aircraft produce lift-
The wing of an aircraft is also
known as the aerofoil. It have a curved shape in order to produce lift. As the aircraft
accelerate before taking off, air moves on the surfaces of the wings. Low pressure air travels on thetop of the aerofoil because the
air on the top moves faster compared to the air in the lower partof the wing (The Bernoulli's Law
states that the faster a gas travels, the lower the air pressure). Thehigh air pressure in the lower part
of the wing pushes the wing upwards and therefore, lift
isproduced.
Stalling
Stalling occurs when the wings of the aircraft receives insufficient flow
of air due to decreased speed and thrust of
aircraft.
Weight
As an aircraft flies in the air, weight or gravitional force acts
on it . If the aircraft have less thrust, the aircraft would decrease
its altitude due to gravitional force.
Drag
Drag decreases the speed of an aircraft. There are two factors that could
produce drag. The first factor is when strong
air current moves in the opposite direction of the aircraft thus, slowing itdown.
The second factor is the structure of the aircraft (eg, Rough surface of
aircraft) that slows it down.
