How a plane fly?

1. PRESENTATIONON AIRFLIGHT

2. ANCIENT CONCEPT
OF AIR FLIGHT
Flight:
Process by which an object achieves sustained
movement through the air by aerodynamically
generating lift.
Leonardo Da Vinci, Italian Scientist and Engineer.
 gathered data on the flight of birds and bats
 developed concepts of the propeller, the parachute
 first recorded scientific study of aeronautics
 experimented to prove feasibility of mechanical flight

3. AERODYNAMICS AND AIRFOIL
Aerodynamic :
A branch of fluid
mechanics that deals
with the motion of
air and other
gaseous fluids.
Airfoil:
An airfoil is the shape
of a wing, blade or
sail. An airfoil shaped
body moved through
a fluid produces an
aerodynamic force.

4. Bernoulli’sPrinciple
As the velocity of a fluid increases the pressure exerted by the fluid
decreases.
AirFlowPasta Wing
 The air speed is greater over the upper surface and the air
pressure is lower there and the wing is lifted
 When the wing is angled upward, air deflected from its lower
surface provides additional lift.
 If the angle is too great, turbulence reduces lift and increases
drag.

5. WHAT HAPPEN THERE ?

6. PROJECTILE MOTION
Any object released into the air is a
projectile.
Six Factors Affect a Projectile’s Path:
 Gravity
 Air resistance
 Speed of release
 Angle of release
 Height of release
 Spin

7. How Airplanes Fly:
4 important forces to account for
while flying
 THRUST : Aircraft’s engines generate thrust.
 LIFT : Air passes over/under airfoil.
 DRAG : Resistance
 WEIGHT : Gravity

8. FORCES OF FLIGHT
LIFT
Lift is an aerodynamic force
Lift must exceed weight for
flight
Generated by motion of
aircraft through air
Created by the effects of
airflow past wing
WEIGHT
Weight is
not
constant
Direction
is toward
earth
center
Maybe
assumed
concentrat
ed at the
center of
gravity

9. FORCES OF FLIGHT
DRAG
An
aerodynamic
force
Drag is also
called air
resistance
The force
that pulls
the plane
backward.
THRUST
Forward-acting
force opposes
drag
Direction of
thrust depends
on design
Propulsion
systems produce
thrust
Equal to drag in
straight, constant
speed flight

10. STABILITY OF FLIGHT
Center of Gravity
Center of pressure
Longitudinal Stability
Lateral stability
Directional Stability
EFFECT OF FORCES

11. DO NOT TRY AT HOME
THE END