Thursday, December 5, 2013

SMITHSONIAN AIRPLANE ADVENTURE

SMITHSONIAN AIRPLANE INFORMATIONS

READ: open the highlighted link above & read the following topics listed below.

FORCES OF FLIGHT

  • The Four Forces
  • We Aren't Built to Fly
GRAVITY & AIR
  • Gravity keeps us Down to Earth
  • Air is Stuff
  • Buoyancy
AERODYNAMICS
  • Air Motion
  • Friction Drag
  • Shock Waves
  • Vortex Drag
PROPULSION 

STRUCTURES & MATERIALS
  • Materials
ACTIVITIES
  • How Wings Work
  • Forces of Flight

Watch the following video's to clarify the forces.  
(click on the highlighted word)

DRAG - Drag is the force that acts opposite to the direction of motion. Drag is caused by friction and differences in air pressure.


Lift is the force that acts at a right angle to the direction of motion through the air. Lift is created by differences in air pressure.




THRUST Thrust is the force that propels a flying machine in the direction of motion. Engines produce Thrust.

WEIGHT - Weight is the force of gravity. It acts in a downward direction—toward the center of the Earth.

Weight is the force of gravity. It acts in a downward direction—toward the center of the Earth.




When an airplane is flying straight and level at a constant speed, the lift it produces balances its weight, and the thrust it produces balances its drag. However, this balance of forces changes as the airplane rises and descends, as it speeds up and slows down, and as it turns.