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I BELIEVE I CAN FLY
by Tantivarakorn Prajai
Outline● Introduction● Information
○ 4 Force on an Airplane○ Banuri Equation○ Newton's Law ○ Future Aircraft
● Conclusion
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IntrodutionQuestion
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Introdution
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Introdution
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4 Force on an Airplane
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What is Lift?● Lift is a mechanical force.● Lift is the force that holds an aircraft in the air.● Lift acts perpendicular to the motion.● NO FLUID, NO LIFT
○ It is generated by the interaction and contact of a solid body with a fluid (liquid or gas)
● NO MOTION, NO LIFT○ The difference in velocity between the solid object and the fluid.
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What is Weight?● Weight is the force generated by the gravitational attraction
of the earth on the airplane.● Weight(gravitational force) is a field force.● Weight is a force which is always directed towards the center
of the earth.● The magnitude of this force depends on the mass of all of the
parts of the airplane.
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What is Thrust?● Thrust is a mechanical force.● Thrust is the force which moves an aircraft through the air. ● Thrust is generated by the engines of the airplane. ● The magnitude of the thrust depends on many factors
associated with the propulsion system:○ type of engine○ number of engines○ throttle setting○ speed.
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What is Drag?● Drag is the aerodynamic force that opposes an aircraft's motion
through the air.● Drag is generated by the difference in velocity between the solid
object and the fluid.● NO MOTION, NO DRAG● many factors that affect the magnitude of the drag force including:
○ the shape of the airplane○ the "stickiness" of the air○ the speed.
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Bernoulli Equation
Daniel Bernoulli
[Portrait by anonymous painter, in Historisches Museum Basel] 10
Bernoulli Equation
http://www.grc.nasa.gov 11
Bernoulli Equation
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Sir Isaac Newton
Sir Isaac Newton
http://astronomy.utfs.org/ 13
Newton's Law● Every object will remain at rest or in uniform motion in a
straight line unless compelled to change its state by the action of an external force
● When flying at a constant attitude : If Thrust and Drag are equal, aircraft holds constant airspeed
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Newton's Law● If Thrust is increased
Aircraft accelerates - airspeed increases Drag depends on airspeed - Drag increaese
● When Drag is again equal to thrust : aircraft no longer accelerates but holds q new, higher, constanr airspeed
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Newton's Law
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Newton's LawAircraft : the air is deflected downward by the action of the airfoil, and in reaction the wing is pushed upward.
Jet engine : The engine produces hot exhaust gases which flow out the back of the engine.
http://www.grc.nasa.gov 17
Future Aircraft
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Future AircraftNASA Tail Technology Could Someday Reduce Airplane Fuel Use
NASA Tail Technology Could Someday Reduce Airplane Fuel Use
The coDemonstrator 757https://www.nasa.gov 19
Quieter More Fuel-Efficient Lighter
NASA's green aviation project
https://www.nasa.gov 20
Electric Propulsion Paired with Digital Control May Open New Horizons for Flight
Mark Moore
https://www.nasa.gov 21
https://www.nasa.gov 22
Conclusion
Greased Lightning GL-10
https://www.nasa.gov 23
Yves Rossy
Wing-suit system backpackw 2.4 mJet-Cat P200 jet engines
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Yves Rossy
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Conclusion
4 Force on an AirplaneBernoulli equationNewton's Law
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Reference● http://www.grc.nasa.gov/WWW/k-
12/VirtualAero/BottleRocket/airplane/newton2.html
● http://www.thaigoodview.com/node/111803● http://www.aeronautics.nasa.gov/● https://www.youtube.com/watch?
v=ygY6BKheiHI
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Q&A28
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