Gyroscopic forces in a flywheel kers system

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SUMMARY

The discussion focuses on the gyroscopic forces acting on a car equipped with a flywheel KERS (Kinetic Energy Recovery System). When the flywheel is mounted transversely and rotates clockwise, gyroscopic precession causes the car to roll left during a right turn, creating a clockwise torque from the front perspective. The angular momentum of the flywheel is calculated about its center of rotation, which remains constant despite the car's translation. Properly defining the coordinate axis and considering the flywheel's mounting position are crucial for accurate torque calculations.

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  • Understanding of gyroscopic precession
  • Knowledge of angular momentum calculations
  • Familiarity with KERS technology
  • Basic principles of vehicle dynamics
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Automotive engineers, physics students, and anyone interested in the dynamics of vehicles equipped with flywheel KERS systems.

Webbd050
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What gyroscopic forces act on a car fitted with a flywheel kers system? From what i understand if the flywheel was mounted transversely and rotating clockwise when viewed from the right side of the car and the car turned right gyroscopic precession would cause the car to roll to the left ie a clockwise torque acts on the car viewed from the front. Is this correct? Or would gyroscopic precession not occur because the flywheel isn't rotating about its centre point but is just moving with the car, if that makes sense. I am really confused haha. How would i go about calculating the torque that acts to roll the car if this is correct? Thanks
 
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You can try this out using the bike-wheel and swivel chair.
Usually you rotate the wheel and the chair turns the other way.
You want to know if you/someone rotate/s the chair, will the wheel attempt to turn?

To avoid confusion, you need to be more careful about where you put your coordinate axis.
The angular momentum in the flywheel is calculated about the center of rotation of the flywheel.
This does not change with translation. Travelling on a curve the car is rotating as well as translating ... try a simple model where the flywheel is centered at the rotation center of the car.
You'll also want to take account of where the flywheel is mounted.
 

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