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Smithsonian National Air and Space Museum

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  • Forces of Flight
    • The Four Forces
    • We Aren't Built to Fly
  • Gravity & Air
    • Gravity
    • Air
    • Buoyancy
  • Aerodynamics
    • Air in Motion
    • Subsonic Wings
    • Factors Affecting Lift
    • Alternative Theories of Lift
    • Pressure Drag
    • Friction Drag
    • Vortex Drag
    • Waves in the Air
    • Shock Waves
  • Propulsion
    • Propellers
    • Engines
    • Rocket Propulsion
    • Vertical Flight
  • Structures & Materials
    • Weight and Strength
    • Materials
    • Hypersonic Vehicles
    • Shaped for Space
  • Flight Dynamics
    • Control Surfaces
    • Roll, Pitch, and Yaw
    • Instruments
    • Gravity in Orbit
    • Newton’s Laws of Motion
    • Kepler’s Laws of Orbital Motion
    • Moving in Space
    • Thrusters and Spinning Wheels
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