Dr. Eberhardt's Talk

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Classical Aerodynamics • Lift does no work! • But, classical aerodynamics assumes a wing of infinite span if span -> infinity power induced -> 0!
Summary • Lift is a REACTION FORCE • Lift is described using Newton’s Laws • Lift requires Power • High span increases wing efficiency
Page 1 and 2:
Understanding Flight: Newton Reigns
Page 3 and 4:
Military Aviation
Page 5 and 6:
What you will learn today • Some
Page 7 and 8:
Explaining Lift • Mathematical de
Page 9 and 10:
The Actual Origin of the Bumblebee
Page 11 and 12:
Physical Description of Lift “For
Page 13 and 14:
Physical Description • Based on N
Page 15 and 16:
Newton’s First Law A body at rest
Page 17 and 18:
Cessna Citation flying over fog (Ph
Page 19 and 20:
Does this picture show an airfoil g
Page 21 and 22: Downwash Wing pulls air down -- Dow
Page 23 and 24: Nature Abhors a Vacuum This cannot
Page 25 and 26: Air could fill from below? Can’t
Page 27 and 28: Air could fill from back
Page 29 and 30: Air could fill from top
Page 31 and 32: Air Picture a curved hose Force
Page 33 and 34: Viscosity Force on glass Force on w
Page 35 and 36: Newton’s 2nd law applied to a win
Page 37 and 38: Diverted Air The amount of air dive
Page 39 and 40: Vertical Velocity The vertical velo
Page 41 and 42: Angle of Attack
Page 44 and 45: Vertical Velocity Vertical velocity
Page 46 and 47: What’s going on in this photo?
Page 48 and 49: T=0 Myth: 1 Particles reach trailin
Page 50 and 51: Reality Air goes much quicker over
Page 52 and 53: Myth #2 These two pictures are not
Page 54 and 55: Summary of Lift • Lift is proport
Page 56 and 57: If Lift didn’t require Power •
Page 58 and 59: What is the Lift? •Lift = Weight
Page 60 and 61: Therefore, as speed increases, down
Page 62 and 63: Induced Power At half the speed: Ha
Page 64 and 65: Parasitic Power The energy loss to
Page 66 and 67: Power 120.0 100.0 80.0 60.0 40.0 20
Page 68 and 69: Summary of Power • Lift requires
Page 70 and 71: Wing Efficiency • Induced power i
Page 74 and 75: References • http://home.comcast.
Page 76 and 77: Composite Structure Lower Maintenan
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Dr. Eberhardt's Talk

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