Aviation FLUID a substance such as a liquid

Aviation FLUID a substance, such as a liquid or gas, that is capable of flowing and that changes its shape at a steady rate when acted upon by a force tending to change its shape. � Aeronautical engineers study fluid dynamics. � blue directional lines represent flow of the fluid air � AIR FOIL

Air � air is a fluid � a mixture of nitrogen, oxygen, and minute amounts of other gases that surrounds the earth and forms its atmosphere � blue lines represent the air

Pressure � the exertion of force upon a surface by an object, fluid, etc. , in contact with it: the pressure of wind against a wall � air exerts pressure against the external surfaces of the airplane as it flows over the airplane

Air Density �the state or quality of being dense; compactness; closely set or crowded condition �example of gas molecules—. . �air density influences engine performance

Liquid-Buoyancy �the power to float or rise in a fluid; relative lightness-----refers to boats

FORCE �http: //www. youtube. com/watch? v=5 ltj. FEei 3 AI&feature=related

Gravity--Force �the force of attraction by which terrestrial bodies tend to fall toward the center of the earth �pulls plane toward the earth �Force of lift must exceed the force of gravity

Lift-Force �lift and speed angles affect the plane �to move or bring (something) upward from the ground or other support to a higher position; hoist

Thrust-Force �opposes drag �thrust must be greater than drag �a linear reactive force exerted by a propeller, propulsive gases, etc. , to propel a ship, aircraft, etc.

Drag-Force �force-opposes forward motion of the aircraft �to draw with force, effort, or difficulty; pull heavily or slowly along; haul; trail

Bernoulli’s Principle �an increase in the velocity of a fluid that is accompanied by a decrease of pressure. Swiss scientist, Daniel Bernoulli (1700 -1782), demonstrated that, in most cases, the pressure in a liquid or gas decreases as the liquid or gas moves faster. This explains in part why a wing lifts an airplane.

�Applies to fluids

Aerodynamics �Study of how air flows around the airplane �the branch of mechanics that deals with the motion of air and other gases and with the effects of such motion on bodies in the medium.

Parts of a Plane

Aileron �a movable surface, usually near the trailing edge of a wing, that controls the roll of the airframe or effects maneuvers, as banks and the like.

Rudder �a movable control surface attached to a vertical stabilizer, located at the rear of an airplane and used, along with the ailerons, to turn the airplane-feet control rudder.

Elevators �a hinged horizontal surface on an airplane or the like, used to control the longitudinal inclination and usually placed at the tail end of the fuselage. -trailing edge of the horizontal stabilizer.

Fuselage �the complete central structure to which the wing, tail surfaces, and engines are attached on an airplane. The body.

Wings Airplane wings are curved on the top which make air move faster over the top of the wing. It moves slower underneath the wing. The slow air pushes up from below while the faster air pushes down from the top. This forces the wing to lift up into the air.

Controlling the Flight of the Plane!

Pitch �stick goes forward trees get bigger �stick goes back trees get smaller �horizontal Stabilizer –elevators used � http: //www. grc. nasa. gov/WWW/k-12/airplane/pitch. html http: //www. youtube. com/watch? v=I_Hgckcho. A&feature=fvsr

Yaw �vertical Stabilizer— uses the rudder �movement of the nose of the aircraft from side to side � http: //www. grc. nasa. gov/WWW/k-12/airplane/yaw. html � http: //www. youtube. com/watch? v=6 Ddwm 4_Ca. YE&feature=channel

Roll �the roll axis is perpendicular to the other two axes with its origin at the center of gravity, and is directed towards the nose of the aircraft �a rolling motion is an up and down movement of the wing tips of the aircraft-uses the ailerons � http: //www. grc. nasa. gov/WWW/k-12/airplane/roll. html � http: //www. youtube. com/watch? v=VYSXWy 7 nz. Y 0&feature= channel

Aircraft-OV-10, T-37, T-38, OA-37, and Beechcraft.

Spacecraft �Name this ship!