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W E L C O M E
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Fundamentals offlight
By-
Prajwala M.S
Arshiya Sultana
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The Four Forces on Flight
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The Four Forces on Flight
The four forces act on the airplane in flightand also work against each other.
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WEIGHTAnd
LIFT
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eight counteracts.ift
he earth s gravity pullsown on objects and gives.hem weight
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Whats it take to create lift?
Air and motion.
How do we explain lift?
Newtons Laws of Motion andBernoullis Principal are used toexplain lift.
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:ewton s Second Law force causes ahange in velocity which in turn.enerates another force :ewton s Third Law net flow of airs turned down resulting in an .qual and opposite upward force
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ewton s Third Law states thator every action there is an.qual and opposite reaction
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Venturi Tube
Bernoulis firstpractical use ofhis theorem
Where are venturitubes used today?
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What is a wing?
A wing is really justhalf a venturi tube.
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Bernoullis Theory in Action
Air speeds up in the constricted&space between the car truck- .creating a low pressure area
Higher pressure on the other
.outside pushes them together
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(A fluid and air acts like a)fluid speeds up as it moves
through a constricted space
ernoulli s Principle,tates that as air speeds, .p its pressure goes down
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:ernoulli's Principlelower moving air belowhe wing creates greater.ressure and pushes up
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:ernoulli s Principle Air movingver the wing moves faster than. -he air below Faster moving airbove exerts less pressure on-he wing than the slower moving.ir below The result is an-- !pward push on the wing lift
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:ernoulli s Principalressure variationround the wing resultsn a net aerodynamic.ushing up
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http://www.grc.nasa.gov/WWW/Wright/airplane/shape.html8/8/2019 aero dynamics1
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wing creates lift due tocombination of &ernoulli s Principalewton s Third Law
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Weight and Lift
For a plane totake off, the lift
must begreater thanthe weight ofthe plane.
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The plane weight is
bigger than the liftthat the planewould be able tocreate.
The plane will nottake off because itcant createenough lift to overcome the addedweight.
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thrustanddrag
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Thrust
Thrust is force which moves plane forward
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(ngines either jet or)ropeller typically provide.he thrust for aircrafthen you fly a paper,irplane you generate the
.hrust
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Lift and thrustLift is created asair flows over thewings, hencekeeping the planein air.
Both have thrust.Wings on planescreates lift, Notthrust.
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DRAG It is caused by
the resistanceof the wind.
The shape andspeed of anairplane
determineshow much dragit has.
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Drag can slow down a plane
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Thrust drag and speed
Speed INCREASES when thrust INCREASES
If thrust is INCREASED the drag will alsoINCREASE a bit.
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Thrust is less than the amount ofdrag.
Plane will start slowing down
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hat will happen when the-ire fighting plane drops itsoad of water?
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irplane Parts
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CONCLUSION
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THANK YOU