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Transcript

  • 1. No.(10) Military Heavy Industry
    Aeronautical Division
    Title : Gyroscope
    Cpt: PhyoePayeAung
    BC. No; 51496
    Flight Test Department
  • 2. Outline of Presentation
    • What is a Gyroscope?
    • 3. History of Gyroscope
    • 4. Properties
    • 5. Axis of Gyro
    • 6. Why should we install Gyro in Aircraft & its Positions
  • What is a Gyroscope?
    • Gyro is a term derived from Egypt, gyration.
    • 7. A device consisting of a spinning mass, typically a disk or wheel, mounted on a base so that its axis can turn freely in one or more directions and thereby maintain its orientation regardless of any movement of the base.
  • History of Gyroscope
    • The earliest gyro was built by GermanJohann Bohnenberger, based on rotating massive sphere in 1817.
    • 8. In 1832, AmericanWalter R. Johnson developed a similar device that based on rotating disc.
    • 9. In 1852, French mathematicianLeon Foucaultwho named his device as Gyro invented world’s first Gyro to research the Earth’s rotation, which was visible in the 8-10 minutes before friction slowed the spinning rotor.
    • 10. In 1860, the invention of electric motors made it possible for a gyro to spin indefinitely and this led to the first prototypeGyro compass.
  • World’s first Gyro of Leon Foucault
  • 11. Angular Momentum
    -Angular momentum(L) can be expressed as the product of the body’smoment of inertia(I) (a measure of an object’s resistance to change in its rotation rate) and itsangular velocity (w)
  • 12.
  • 13. Properties
    • The fundamental properties of a gyroscope are as follow;
    (a)Rigidity in Space
    The property which resists any force tending to change the plane of rotation of its rotor. It is dependent on three factors:
    ( i ) the mass of rotor
    (ii ) the speed of rotation
    (iii) the distance at which the mass acts from the center
    (b)Precession
    The angular change in direction of plane of rotation under the influence of an applied force. The change in direction will not take place with the applied force but always at a point 90 away in the direction of rotation. The rate of precession also depends on three factors:
    ( i ) the strength & direction of the applied force
    ( ii) the moment of inertia of the rotor
    (iii) the angular velocity of rotor
    .
  • 14. ukdZmenfqDrSykHxnfh&ef
  • 15. Rigidity & Precession of Gyro
  • 16. Gyro effect on a Bicycle
    Applied force
    Spin Axis
    Precession
  • 17. Axis of Gyro
    • The three axis of Gyro are as follow;
    (a)
  • 18. Why Should we install Gyro in Aircraft & its Positions