User Tag List

Results 1 to 5 of 5

Thread: Instability or a Body Rotating About a Minor Axis In Space - Cool Video

  1. #1
    Alumni Member & VIP V.I.P
    Overall activity: 30.0%

    Sled Dog's Avatar
    Join Date
    Feb 2014
    Location
    Los Angeles
    Posts
    36,500
    Thanks
    7,507
    Thanked: 21,799
    Blog Entries
    2
    Rep Power
    21474877

    Instability or a Body Rotating About a Minor Axis In Space - Cool Video

    Freedom Takes "I Won't". - Eric Frank Russell

    Trump has been President for 412 days and Ruth Bader Ginzberg hasn't had the decency to die. What's up with that?

    Because we have fascists that can't turn this country into Venezuela until the victims are disarmed.



    And some said my other husky avatar was scary.

  2. The Following User Says Thank You to Sled Dog For This Useful Post:

    Jen (04-19-2017)

  3. #2
    Alumni Member & VIP V.I.P
    Overall activity: 59.0%

    Rickity Plumber's Avatar
    Join Date
    Nov 2014
    Posts
    16,645
    Thanks
    9,795
    Thanked: 13,634
    Rep Power
    21474856
    interesting . . .

    I had to watch with sound off. Does he explain the theory behind this?



  4. #3
    Alumni Member & VIP V.I.P
    Overall activity: 30.0%

    Sled Dog's Avatar
    Join Date
    Feb 2014
    Location
    Los Angeles
    Posts
    36,500
    Thanks
    7,507
    Thanked: 21,799
    Blog Entries
    2
    Rep Power
    21474877
    Quote Originally Posted by Rickity Plumber View Post
    interesting . . .

    I had to watch with sound off. Does he explain the theory behind this?
    No, but it's about energy transfers between two different slightly unstable modes of rotation about a minor axis of inertia.

    The major axis of inertia would be parallel to the axis of the bigger cylinder, but offset by some fraction due to the mass of the stem sticking out. If it had been spun through that axis, it would have been more or less happy and

    But this object is rotating about the lesser axis through the stem and it wobbles slightly, and as the wobble gets farther away from the principal axis, it gets more unstable and then it slips into the other mode.

    The math is both complicated....and something I haven't reviewed since 1990.
    Freedom Takes "I Won't". - Eric Frank Russell

    Trump has been President for 412 days and Ruth Bader Ginzberg hasn't had the decency to die. What's up with that?

    Because we have fascists that can't turn this country into Venezuela until the victims are disarmed.



    And some said my other husky avatar was scary.

  5. The Following 2 Users Say Thank You to Sled Dog For This Useful Post:

    Conservative Libertarian (04-19-2017),Rickity Plumber (04-19-2017)

  6. #4
    V.I.P. V.I.P
    Overall activity: 22.0%

    Swedgin's Avatar
    Join Date
    Feb 2014
    Posts
    8,911
    Thanks
    2,472
    Thanked: 9,187
    Rep Power
    21474849
    I hope he doesn't lose that lever, if is important!
    Al Swearengen: What's your partner so mad about all the time?
    Sol Star: He's not mad.
    Al Swearengen: He's got a mean way of being happy.



  7. #5
    Alumni Member & VIP V.I.P
    Overall activity: 30.0%

    Sled Dog's Avatar
    Join Date
    Feb 2014
    Location
    Los Angeles
    Posts
    36,500
    Thanks
    7,507
    Thanked: 21,799
    Blog Entries
    2
    Rep Power
    21474877
    My daughter says the guy in the khakis looks like the State Farm guy.
    Freedom Takes "I Won't". - Eric Frank Russell

    Trump has been President for 412 days and Ruth Bader Ginzberg hasn't had the decency to die. What's up with that?

    Because we have fascists that can't turn this country into Venezuela until the victims are disarmed.



    And some said my other husky avatar was scary.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •