3 AirplanesStraight and Level FlightThrust = DragLift = Weight
4 Airplanes Thrust Means of Thrust Aerodynamic force created by an airplane inorder to overcome drag.PropellersJet EnginesRocketsMeans of Thrust
5 AirplanesDragAn aerodynamic force that resist the motion of an objectThrough a fluid (air and water are fluids)The amount of drag an airplane creates depends on:Size and shape of the plane.Speed of an airplane.Density of the air.Landing gears areretracted to reduce thedrag.
6 AirplanesWeightEvery object on earth has weight (including air)
7 Airplanes Lift Aerodynamic force that holds an airplane in air. Most of the lift required to keep the plane aloft is created bythe wings.
8 Airplanes Longer Path Explanation Particles split at the leading edge, and they come together at thetrailing edge of the wing.Since the particles on top travel longer distance in same amountof time, they must be traveling faster.Bernoulli’s Theory: The speed of a fluid increases, its pressuredecreases.Faster moving air on the top creates a low pressure on the top.The low pressure on the top essentially “sucks” the plane wingsupward.
9 Airplanes Interesting Things about wings Wing Shape The Angle of AttackFlapsSlats
11 Airplanes Angle of Attack The angle that the wing presents to oncoming air, and itControls the thickness of the slice of air the wings is cutting off.As it controls the slice, the angle of attack also controls theamount of lift that the wing generates.Zero angleShallow angleSteep angle
12 AirplanesTo compensate for different speeds (Cruise speed 901Kph andLanding speed 332Kph) Airplane wings are equipped with:Flapsairplane wings have moveable sections at the trailingedge .are extended rearward and downwardSlatssame function as Flaps, but attached at the front of the wings
13 Airplanes Propeller: provides the thrust that moves the plane forward Has an angle of attackAngle of attack changes along the lengthof the propellerThe angle is greater toward the center becausethe speed of the propeller through the air isslower close to the hub.Some props have an adjustable pitch: propellerAngle changes depending on air speed and altitude
14 Airplanes Horizontal and Vertical Stabilizers Tail of airplane has two small wings: horizontal andvertical stabilizers.Horizontal: Controls up and downVertical: Controls left and right
15 Airplanes Controlling the Direction Rudder controls Yaw Ailerons controls RollElevators controls Pitch
16 Airplanes Elastic Band Airplane Facts: In 1909 American record for distance flown with a rubberband powered airplane was just over 200 feetIn 1916 , Thomas Hall flew his model plane 5337 feetIn 1924, Robert V. Jaros flew a model 7920 feet in10 minutes and 14 secondsToday model airplanes fly for over 40 minutes.
17 Airplanes References Google Search Engine Mike’s Free Gifs How Stuff Works