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BASICS OF AERODYNAMICS AND FLIGHT
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AIRCRAFT
DEFINITION
A MAN MADE FLYING MACHINE.
are there types?
TYPES OF AIRCRAFT
AIR CRAFT
LIGHTER-THAN-AIR HEAVIER-THAN-AIR
Airships Free balloons Captive balloons
POWER DRIVEN NON-POWER-DRIVEN MAN-POWER-DRIVEN
Gliders Sailplanes Kites
AEROPLANE ROTORCRAFT ORNITHOPTER
Land plane seaplane Amphibian Helicopter(rotor power driven)
Gyroplane(rotornot powerdriven)
Cyclogyro(paddle-wheel type rotor)
Float plane Flying boat
AIR CRAFT
TYPES OF AIRCRAFT
LIGHTER-THAN-AIR HEAVIER-THAN-AIR
Airships Free balloons Captive balloons
POWER DRIVEN NON-POWER-DRIVEN MAN-POWER-DRIVEN
Gliders Sailplanes Kites
AEROPLANE ROTORCRAFT ORNITHOPTER
Land plane seaplane Amphibian Helicopter(rotor power driven)
Cyclogyro(paddle-wheel type rotor)
Float plane Flying boat
a
TYPES OF AIRCRAFT
LIGHTER-THAN-AIR HEAVIER-THAN-AIR
Airships Free balloons Captive balloons
POWER DRIVEN NON-POWER-DRIVEN MAN-POWER-DRIVEN
AIRCRAFT
AEROPLANE ROTORCRAFT ORNITHOPTER
Land plane seaplane Amphibian Helicopter(rotor power driven)
Cyclogyro(paddle-wheel type rotor)
Float plane Flying boat
TYPES OF AIRCRAFT
LIGHTER-THAN-AIR HEAVIER-THAN-AIR
Airships Free balloons Captive balloons
POWER DRIVEN NON-POWER-DRIVEN MAN-POWER-DRIVEN
Gliders Sailplanes Kites
AEROPLANE ROTORCRAFT ORNITHOPTER
Land plane seaplane Amphibian Helicopter(rotor power driven)
Cyclogyro(paddle-wheel type rotor)
Float plane Flying boat
AIRCRAFT
TYPES OF AIRCRAFT
LIGHTER-THAN-AIR HEAVIER-THAN-AIR
Airships Free balloons Captive balloons
POWER DRIVEN NON-POWER-DRIVEN MAN-POWER-DRIVEN
Gliders Sailplanes Kites
AEROPLANE ROTORCRAFT ORNITHOPTER
Land plane seaplane Amphibian Helicopter(rotor power driven)
Cyclogyro(paddle-wheel type rotor)
Float plane Flying boat
AIRCRAFT
TYPES OF AIRCRAFT
LIGHTER-THAN-AIR HEAVIER-THAN-AIR
Airships Free balloons Captive balloons
POWER DRIVEN NON-POWER-DRIVEN MAN-POWER-DRIVEN
Gliders Sailplanes Kites
AEROPLANE ROTORCRAFT ORNITHOPTER
Helicopter(rotor power driven)
Float plane Flying boat
AIRCRAFT
TYPES OF AIRCRAFT
LIGHTER-THAN-AIR HEAVIER-THAN-AIR
Airships Free balloons Captive balloons
POWER DRIVEN NON-POWER-DRIVEN MAN-POWER-DRIVEN
Gliders Sailplanes Kites
AEROPLANE ROTORCRAFT ORNITHOPTER
Land plane seaplane Amphibian Helicopter(rotor power driven)
Cyclogyro(paddle-wheel type rotor)
Float plane Flying boat
AIRCRAFT
ORNITHOPTER
TYPES OF AIRCRAFT
LIGHTER-THAN-AIR HEAVIER-THAN-AIR
Airships Free balloons Captive balloons
POWER DRIVEN NON-POWER-DRIVEN MAN-POWER-DRIVEN
Gliders Sailplanes Kites
AEROPLANE ROTORCRAFT ORNITHOPTER
Land plane seaplane Amphibian Helicopter(rotor power driven)
Cyclogyro(paddle-wheel type rotor)
Float plane Flying boat
AIRCRAFT
Gyroplane(rotornot powerdriven)
CYCLOGYRO
GYROPLANE
TYPES OF AIRCRAFT
LIGHTER-THAN-AIR HEAVIER-THAN-AIR
Airships Free balloons Captive balloons
POWER DRIVEN NON-POWER-DRIVEN MAN-POWER-DRIVEN
Gliders Sailplanes Kites
AEROPLANE ROTORCRAFT ORNITHOPTER
Land plane seaplane Amphibian Helicopter(rotor power driven)
Cyclogyro(paddle-wheel type rotor)
Float plane Flying boat
AIRCRAFT
Gyroplane(rotornot powerdriven)
TYPES OF AIRCRAFT
AIR CRAFT
LIGHTER-THAN-AIR HEAVIER-THAN-AIR
Airships Free balloons Captive balloons
POWER DRIVEN NON-POWER-DRIVEN MAN-POWER-DRIVEN
Gliders Sailplanes Kites
AEROPLANE ROTORCRAFT ORNITHOPTER
Land plane seaplane Amphibian Helicopter(rotor power driven)
Gyroplane(rotornot powerdriven)
Cyclogyro(paddle-wheel type rotor)
Float plane Flying boat
LIGHTER THAN AIR
EUREKA ! !! !
___________________________--------------------------------------------- ------------------------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------- ----------------------------------- ------------------------------ -------------------------- ------------------ --------------------------------------------------------------------------------------------------------- ------------------------------ ------------------------------- --------------------------------- ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- --------------------------------- ------------------------------- ---------------------------- -------------------- ------------------- ------------------------------- --------------- ------------------------------------------------------------------------------------------------------------------------------------------------------------------- --------------------------------------------------------
Upward thrust eqalTo weight of displacedwater
Weight of body
Principle of Archimedes
Upward thrust equal to weight of displaced air
Weight of Balloon + Weight of Gas
Archimedes’ principle applied to a balloon
IT’S SO HUGE !WHAT MAKES IT RISE TO THE SKY?
LIFT
Principles of heavier-than-air flight
Direction of forceActing on cardboard
Leading Edge
Direction of travel
Trailing Edge
LIFT
Meaning of lift and drag
Direction of travelLi
ft
Tota
l For
ce
Drag
ANGLE OF ATTACK
Angle of attack and centre of pressure
Direction of travel
Lift
Angle of attack
Direction of air flow
Centre of Pressure
PITCH ANGLE ?
USES OF AEROFOILS
• Wings
• Propellers and Turbofans
• Helicopter Rotors
• Compressors and Turbines
• Hydrofoils (wing-like devices which can lift up a boat above waterline)
• Wind Turbines
AIRFLOW OVER AN AEROFOIL
Upwash Downwash
Incr V
Decr V
Dirn of airflow
VENTURY
WHAT IS LIFT?
• Lift is the aerodynamic force acting at right angles to the direction of motion of the object.
• It is produced by interaction of the moving object and the fluid.
• This interaction typically leads to a pressure differential being set up between upper surface and lower surface of the object.
• The net effect of high pressure below and low pressure above will produce a force which sustains the object against descent due to gravity.
WHAT IS LIFT?
Flying aircraft
FACTORS AFFECTING LIFT
EFFECTS OF SIZE ON LIFT
EFFECTS OF SHAPE ON LIFT
EFFECT OF VELOCITY ON LIFT
Greater the velocity of fluid on the aerofoil the lower the pressure.
Hence greater the presssure differential.
Thus higher the value of lift.
Jo
What Happens to an Airfoil when it Stalls ?
• Flow over the top surface separates from the airfoil, resulting in a high pressure wake region
LIFT COEFFICIENT
DRAG.
LIFT
Meaning of lift and drag
Direction of travelLi
ft
Tota
l For
ce
Drag
DRAG IS THAT PART OF THE FORCE WHICH IS
PARRALEL TO THE DIRN OF AIRFLOW.
DRAG• TYPES OF DRAG
– ACTIVE/ WING DRAG• INDUCED DRAG • FORM DRAG• SKIN FRICTION DRAG
– PARASITE DRAG• FORM DRAG• SKIN FRICTION DRAG
– SHOCK DRAG• WAVE DRAG• SHOCK TURBULENCE DRAG