Mi-7 Double Wheel Gyroscope


To demonstrate that the angular momentum is a vector quantity.


  • Double wheel Gyroscope
  • Gyro spinner

Double Wheel Gyro

Double Wheel Gyro.


Two bicycle wheels are mounted on a single arm and may be spun to high speed independently. If one wheel is spun the normal precession demonstration may be carried out. If the second wheel is spun so that it is rotating in the same direction as the first, the precession rate is increased. If instead, the second wheel is made to rotate in the opposite direction to the first, the angular momentum vectors cancel and the system has essentially no angular momentum and the wheels act as dead weights.