Definition of AIRCRAFT

• A device that is used for flight in the air

Definition of AIRPLANE

• An engine-driven,•

• fixed-wing aircraft,

• heavier than air,

• that is supported in flight by the dynamic reaction of the air against its wings

On 21 November 1783, the first free flight by humans was made by Pilâtre de Rozier, together with an army officer, the marquis d’Arlandes.

On the 19th of September 1783, the Aérostat Réveillon was flown with the first living beings in a basket attached to the balloon: a sheep called Montauciel ("Climb-to-the-sky"), a duck and a rooster.

The Montgolfier brothers in France, were the inventors of a hot air balloon.

As lift increases,drag increases;

As lift decreases,drag decreases.

Lift is created by the principleof physics called

“Bernoulli”s Principle” !!!

Angle of Attack also

affects lift !!!

However, if the angle of attack is too great,

the wing will “stall” !!!