gjslsffan

004

004
gjslsffan, Aug 4, 2015
    • mountaincreekar
      Is this the longest of Frisco cranes?
      With rail joiners and flexing ties,
      I wonder with this crane's cables, (like springs) so long, how much did the long arm
      bounce up and down?
      1st natural frequency is ~ 4 cycles per second (?) when large things start to vibrate with
      much higher amplitudes if cycles / second impulses stay ~ steady..

      I like this crane.

      -
    • gjslsffan
      Huh, what?
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  • Album:
    HO model Rolling stock
    Uploaded By:
    gjslsffan
    Date:
    Aug 4, 2015
    View Count:
    1,235
    Comment Count:
    2