国外航校私照飞行员地面课L1.pptxVIP

Sierra Academy of Aeronautics PPL Ground; Aircraft structure Aerodynamics – introduction Four forces Turning Tendencies ;Aircraft Structure;Empenage ;;Any surface designed to obtain a desired reaction force when in motion relative to the surrounding air. Examples: Wing Propeller; Leading Edge Trailing Edge Chord line Camber ;Four Forces;Is the upward acting force Two theories associated with Lift: Bernoullis Principle Newton’s 3rd Law of Motion ;Angle of Attack ;AOA - angle between chord line and relative wind. Pitch is where the nose of the airplane is in relation to the horizon. Could you have a low pitch but a high angle of attack?; As velocity increases, pressure decreases ; For every action there is an equal and opposite reaction ;Increase angle of attack This works up to the critical angle of attack Increase speed Add flaps;Gravity is the pulling force that tends to draw all bodies downward to the center of the earth. ;Forward acting force The propeller is an airfoil, it creates lift in a forward direction.;The rearward acting force Two types of drag Parasite Drag Induced Drag;Forces that slow an aircraft’s movement As speed increases parasite drag increases Three Types of Parasite Drag Form drag Design of the airplane Skin-friction drag Bugs, frost, dirt, etc. Interference drag Located where two points on the aircraft meet.;Induced Drag;Torque Reaction Corkscrew Effect (Spiraling Slip Stream) Asymmetrical Thrust (P-Factor) Gyroscopic Precession ;Torque Reaction;Corkscrew Effect (Spiraling Slip Stream) ;Review Prop Angle of Attack;Asymmetrical Thrust (P-Factor);