aero dynamics1

8/8/2019 aero dynamics1

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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.html


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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

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