Immediately after the H3 rocket's first launch attempt was aborted, a loud squealing noise could be heard on the live stream. What was this?

The only thing I could find about it when searching the Internet was a Twitter comment by Chris Bergin suggesting that it was expected in some way.

  • 1
    $\begingroup$ yikes - somebody set a phaser to overload? $\endgroup$
    – uhoh
    Feb 21 at 14:23
  • $\begingroup$ The tweet makes no sense, considering the rocket has never been launched. $\endgroup$ Feb 21 at 20:52
  • $\begingroup$ If you listen through the roar of the engines of the first launch, you can hear the squeal, which suggests it's some pad infrastructure $\endgroup$
    – Tristan
    Jul 31 at 14:42


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