To browser these website, it's necessary to store cookies on your computer.
The cookies contain no personal information, they are required for program control.
  the storage of cookies while browsing this website, on Login and Register.

Storing Cookies (See : ) help us to bring you our services at . If you use this website and our services you declare yourself okay with using cookies .More Infos here:
If you do not agree with storing cookies, please LEAVE this website now. From the 25th of May 2018, every existing user has to accept the GDPR agreement at first login. If a user is unwilling to accept the GDPR, he should email us and request to erase his account. Many thanks for your understanding

User Menu

Custom Search

Author Topic: Strange spinning toys  (Read 4603 times)

Offline FreeEnergy

  • Hero Member
  • *****
  • Posts: 2014
    • The Freedom Cell Network
Strange spinning toys
« on: August 22, 2007, 12:36:07 PM »
 The bizarre behavior of some spinning toys may be able to explain why the Earth's magnetic field reverses.

Offline fletcher

  • Sr. Member
  • ****
  • Posts: 399
Re: Strange spinning toys
« Reply #1 on: August 23, 2007, 01:26:29 AM »
Did someone catch the explanation for why the rattleback reversed ? Interesting & articulate presentation by the proffessor.

Looks to me like there should not be any diffence in torque [if considered in isolation] when the turtles were opposed at right angles to the lever/boat ?

Unless the direction the turtles face, in relation to the spin direction, causes asymmetric drag [like a helicopter advancing & retreating blade] when combined with the down-lift generated by the boats hull. This could cause the rocking motion, if there were any sort of relative air flow ?

That is, changing kinetic energy of induced torque [horizontal rotational KE] put into the system into a vertical component of KE i.e. rocking instability, by the aerodynamic forces ? The toy then takes the path of least resistance as it tries to stabilize its angular velocity [wobble] & reverses direction ? Just thoughts  :)

Edit : Nahh - not likely there was any breeze around it so it must be a theory related to the detabilization & reversing of the magnetic poles ?
« Last Edit: August 23, 2007, 01:49:49 AM by fletcher »

Offline FreeEnergy

  • Hero Member
  • *****
  • Posts: 2014
    • The Freedom Cell Network
Re: Strange spinning toys
« Reply #2 on: August 27, 2007, 09:54:59 PM »
i don't think too many people have seen this effect.

Offline Prophmaji

  • Full Member
  • ***
  • Posts: 124
Re: Strange spinning toys
« Reply #3 on: September 14, 2007, 06:16:10 AM »
vortex energy.