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  2. Critical speed - Wikipedia

    en.wikipedia.org/wiki/Critical_speed

    Both calculate an approximation of the first natural frequency of vibration, which is assumed to be nearly equal to the critical speed of rotation. The Rayleigh–Ritz method is discussed here. For a shaft that is divided into n segments, the first natural frequency for a given beam, in rad/s , can be approximated as:

  3. Dunkerley's method - Wikipedia

    en.wikipedia.org/wiki/Dunkerley's_Method

    Dunkerley's method [1] [2] is used in mechanical engineering to determine the critical speed of a shaft-rotor system. Other methods include the Rayleigh–Ritz method . Whirling of a shaft

  4. List of games compatible with FreeTrack - Wikipedia

    en.wikipedia.org/wiki/List_of_games_compatible...

    Battlefield 2 - [Yaw, Pitch, Roll, X, Y, Z] - BF2FreeLook; DCS: A-10C - [Yaw, Pitch, Roll, X, Y, Z] - FreeTrack compatible headtracker.dll plugin; DCS: Black Shark 2 ...

  5. Yaw (rotation) - Wikipedia

    en.wikipedia.org/wiki/Yaw_(rotation)

    A yaw rotation is a movement around the yaw axis of a rigid body that changes the direction it is pointing, to the left or right of its direction of motion. The yaw rate or yaw velocity of a car, aircraft, projectile or other rigid body is the angular velocity of this rotation, or rate of change of the heading angle when the aircraft is ...

  6. Rotordynamics - Wikipedia

    en.wikipedia.org/wiki/Rotordynamics

    The critical speed of a rotating machine occurs when the rotational speed matches its natural frequency. The lowest speed at which the natural frequency is first encountered is called the first critical speed, but as the speed increases, additional critical speeds are seen which are the multiples of the natural frequency.

  7. Campbell diagram - Wikipedia

    en.wikipedia.org/wiki/Campbell_diagram

    Analysis shows that there are well-damped critical speed at lower speed range. Another critical speed at mode 4 is observed at 7810 rpm (130 Hz) in dangerous vicinity of nominal shaft speed, but it has 30% damping - enough to safely ignore it. Analytically computed values of eigenfrequencies as a function of the shaft's rotation speed. This ...

  8. Hunting oscillation - Wikipedia

    en.wikipedia.org/wiki/Hunting_oscillation

    The potential energy at maximum axle yaw may be increased by including an elastic constraint on the yaw motion of the axle, so that there is a contribution arising from spring tension. Arranging wheels in bogies to increase the constraint on the yaw motion of wheelsets and applying elastic constraints to the bogie also raises the critical speed.

  9. Aircraft flight dynamics - Wikipedia

    en.wikipedia.org/wiki/Aircraft_flight_dynamics

    The three axes of rotation in an aircraft. Flight dynamics is the science of air vehicle orientation and control in three dimensions. The three critical flight dynamics parameters are the angles of rotation in three dimensions about the vehicle's center of gravity (cg), known as pitch, roll and yaw.