Smarter Every Day video shows Subsonic bullets moving air at supersonic speeds Way cool

Discussion in 'NFA - Stamp collecting' started by 11B CIB, Nov 5, 2018.

  1. 11B CIB

    11B CIB IG: HandloadsAndHoldovers Staff Member Charter Member

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    I want to compare all kinds of different bullets and speeds now
     
  2. BigWaylon

    BigWaylon Head philatelist Staff Member Charter Member Benefactor

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  3. Millie

    Millie Well-Known Member Supporting Member

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    That was awesome! Thanks....
     
  4. Chdamn

    Chdamn Dungeon Master Staff Member Benefactor Charter Life Member

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    I just nerded the effe out on that video. Man I love that kind of stuff. Really makes me wish I'd gone to college and studied Aerodynamics.
     
  5. InvisibleOne

    InvisibleOne a.k.a. LoboLoco Life Member

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    The bullet is flying subsonic, but the air speed passing over the ogive becomes supersonic .... VERY cool!
     
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  6. willpgn

    willpgn Active Member Supporting Member

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    Very cool! He had a good one on suppressors as well.
     
  7. Duane

    Duane Member Supporting Member

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    Wow. Just wow. Thanks for posting the link.
     
  8. Duane

    Duane Member Supporting Member

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    Wow. Just wow. Thanks for posting the link.
     
  9. Harper

    Harper New Member

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    great video. Thanks for sharing
     
  10. BigWaylon

    BigWaylon Head philatelist Staff Member Charter Member Benefactor

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    Follow-up video posted:

     
  11. 11B CIB

    11B CIB IG: HandloadsAndHoldovers Staff Member Charter Member

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    It looked like with the SUBSONIC bullet, there are still supersonic waves due to the particulates and the air moving out from in front of the bullet. I wonder if they tested one at 1000fps vs 850fps how different it would look, and if that would translate to a reduction in noise at all (due to the powder variation, that would have to be excluded some how). Probably not, as it’s happening so fast the sounds blend together, but it’s interesting to think about

    It also sucks that the people who watch his videos complained enough he had to put a “I’m not glorifying guns” disclaimer out there. The so called intellectuals can’t let go of anything...they see a gun and freak out.
     
  12. Goofyfoot2001

    Goofyfoot2001 Member Supporting Member

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    My father passed a few weeks ago. He has a patent on a mach speed sensor from his prat and whitney days. Uses that shockwave angle to measure the speed of supersonic aircraft...er as far as I can tell. Math is the same.

    Screenshot_2018-12-06-20-30-45.png
     
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  13. Harper

    Harper New Member

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    How does powder get in front of the bullet? Assuming that the powder isn't from the round shot before. ???????

    Great video
     
  14. Button Pusher

    Button Pusher Well-Known Member Benefactor

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