Air Persuasive Speech

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FOR A MOMENT, THINK OF AN AIRPLANE MOVING FROM LEFT TO RIGHT AND THE FLOW OF AIR MOVING FROM RIGHT TO LEFT. THE WEIGHT OR FORCE DUE TO GRAVITY PULLS DOWN ON THE PLANE OPPOSING THE LIFT CREATED BY AIR FLOWING OVER THE WING. THRUST IS GENERATED BY THE PROPELLER AND OPPOSES DRAG CAUSED BY AIR RESISTANCE TO THE AIRPLANE. DURING TAKE OFF, THRUST MUST BE GREATER THAN DRAG AND LIFT MUST BE GREATER THAN WEIGHT SO THAT THE AIRPLANE CAN BECOME AIRBORNE. FOR LANDING THRUST MUST BE LESS THAN DRAG, AND LIFT MUST BE LESS THAN WEIGHT. THE FOUR FORCES ACTING ON AN AEROPLANE AN AIRPLANE IN FLIGHT IS THE CENTRE OF A CONTINUOUS TUG OF WAR BETWEEN FOUR FORCES: LIFT, GRAVITY FORCE OR WEIGHT, THRUST, AND DRAG. LIFT AND DRAG ARE CONSIDERED AERODYNAMIC FORCES BECAUSE THEY EXIST DUE TO THE MOVEMENT OF THE AIRCRAFT THROUGH THE AIR. THE WEIGHT PULLS DOWN ON THE PLANE OPPOSING THE LIFT CREATED BY AIR FLOWING OVER THE WING. THRUST IS GENERATED BY THE PROPELLER AND OPPOSES DRAG CAUSED BY AIR RESISTANCE TO THE FRONTAL AREA OF THE AIRPLANE. DURING…show more content…
THE DESIGN WAS RELATIVELY THIN AT THE LEADING EDGE AND PROGRESSIVELY WIDENED TO A POINT OF GREATEST THICKNESS AS FAR AFT AS POSSIBLE. THE THEORY IN USING AN AIRFOIL OF THIS DESIGN WAS TO MAINTAIN THE ADHESION OF THE BOUNDARY LAYERS OF AIRFLOW WHICH ARE PRESENT IN FLIGHT AS FAR AFT OF THE LEADING EDGE AS POSSIBLE. ON NORMAL AIRFOILS THE BOUNDARY LAYER WOULD BE INTERRUPTED AT HIGH SPEEDS AND THE RESULTANT BREAK WOULD CAUSE A TURBULENT FLOW OVER THE REMAINDER OF THE FOIL. THIS TURBULENCE WOULD BE REALIZED AS DRAG UP THE POINT OF MAXIMUM SPEED AT WHICH TIME THE CONTROL SURFACES AND AIRCRAFT FLYING CHARACTERISTICS WOULD BE AFFECTED. THE FORMATION OF THE BOUNDARY LAYER IS A PROCESS OF LAYERS OF AIR FORMED ONE NEXT TO THE OTHER, IE; THE TERM LAMINAR IS DERIVED FROM THE LAMINATION PRINCIPLE

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