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    sonicbomb.com :: View topic - Double-fireball

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    bueschu
    Cherokee (3.8 mt)


    Joined: Mar 17, 2008
    Posts: 420

    PostPosted: Wed Apr 30, 2008 3:48 pm Reply with quote

    Does anyone know if large blast (500kt <) can create double-fireballs like the grable-usphot-test? On the footage I've seen so far, large blasts seem to create only single-fireballs. But then, those fireballs are often hidden behind wilson-clouds (not sure that's the right term), so it's difficult to tell.
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    Graviton
    Yankee (13.5 mt)


    Joined: Sep 03, 2006
    Posts: 1513
    Location: USA

    PostPosted: Wed Apr 30, 2008 4:50 pm Reply with quote

    bueschu wrote:
    Does anyone know if large blast (500kt <) can create double-fireballs like the grable-usphot-test? On the footage I've seen so far, large blasts seem to create only single-fireballs. But then, those fireballs are often hidden behind wilson-clouds (not sure that's the right term), so it's difficult to tell.


    I have never seen one from other than Grable and Priscilla shots.

    Read this about Priscilla shot, from
    DNA 6603F
    (PDF pp. 29-30)
    SHOT PRISCILLA
    A Test of the PLUMBBOB Series
    24 JUNE 1957:

    Quote:
    Loudspeakers announced the 30-minute warning and the observers were ordered into the trenches. All unnecessary electronic equipment, including radios and vehicles, was turned off. Radio silence was ordered 15 minutes before the detonation. A siren announced the ten-minute warning. Loudspeakers announced the five-minute warning and gasoline engines were turned off. Persons without dense goggles turned their backs toward ground zero at this time and were not to turn around until after the initial flash. One minute before the detonation the AEC Control Point announcer started to broadcast the countdown. Those observers in trenches crouched, closed and covered their eyes; those supplied with goggles put them on (35).

    One Armed Forces Special Weapons Project (AFSWP) participant described Shot PRISCILLA as follows: "H hour and what an hour. . . . the thermal wave was very intense and the shock wave upset a number of people who were not braced for it." The ground shock reportedly caused a portion of one observer trench to collapse, partially burying some observers. These individuals were promptly dug out by their companions in the trench area.


    Also read this account of Priscilla in dramatic detail, by Saffer.
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    sonicbomb
    Forum Admin
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    Joined: Aug 06, 2006
    Posts: 1693
    Location: UK

    PostPosted: Thu May 01, 2008 12:59 am Reply with quote

    I'm sure we discussed this before and I think the consensus was that it was a unique combination of atmospherics and the weapon used that made for a double fireball.

    Don't forget Owens Plumbob. Not that I have seen any footage, but based on this picture it appears to have a double fireball too.

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    Graviton
    Yankee (13.5 mt)


    Joined: Sep 03, 2006
    Posts: 1513
    Location: USA

    PostPosted: Thu May 01, 2008 1:31 am Reply with quote

    sonicbomb wrote:
    I'm sure we discussed this before and I think the consensus was that it was a unique combination of atmospherics and the weapon used that made for a double fireball.

    Don't forget Owens Plumbob. Not that I have seen any footage, but based on this picture it appears to have a double fireball too.



    Yes, Owens. A hasty omission of mine.
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    altair7
    Cherokee (3.8 mt)


    Joined: Aug 10, 2007
    Posts: 426
    Location: Monte Bello Islands

    PostPosted: Thu May 01, 2008 3:35 am Reply with quote

    Here is a video of Grable.

    http://video.google.com/videoplay?docid=7278951069225366106&ei=yTkZSPHONaSQqwPc8PXnBg&hl=en
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    bueschu
    Cherokee (3.8 mt)


    Joined: Mar 17, 2008
    Posts: 420

    PostPosted: Thu May 01, 2008 9:39 am Reply with quote

    Hmm, guess we'd have to test our own h-bomb to find out. Twisted Evil
    Actually here there is a similar phenomenon. Probably the explosion had to occur at a lower hight to form a proper double-fireball (assumed large weapons could create one).

    http://sonicbomb.com/modules.php?name=Content&pa=showpage&pid=118&page=2

    Here's one too, but it's a small weapon, all right.

    http://sonicbomb.com/modules.php?name=Content&pa=showpage&pid=207

    Thx for the info & the links anyway!
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    altair7
    Cherokee (3.8 mt)


    Joined: Aug 10, 2007
    Posts: 426
    Location: Monte Bello Islands

    PostPosted: Fri May 02, 2008 3:31 am Reply with quote

    I thinks its caused because the top part of the fireball rises much faster than the bottom part, therefore it splits and causes a double fireball, I mean just whatch the Grable video, it is a perfect example. Smile Look at your Avatar, bueschu, that has a bouble fireball effect.
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    Blake
    Tewa (5 mt)


    Joined: Jun 25, 2007
    Posts: 680
    Location: Florida

    PostPosted: Wed May 07, 2008 3:57 pm Reply with quote

    How about Plumbob Fizeau? This looks like two scoops.


    Last edited by Blake on Sat May 10, 2008 11:21 pm; edited 1 time in total
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    sonicbomb
    Forum Admin
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    Joined: Aug 06, 2006
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    Location: UK

    PostPosted: Wed May 07, 2008 4:55 pm Reply with quote

    Agreed, but more of a skirt than a second fireball.

    Fizeau
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    raigainousa
    King (500 kt)


    Joined: Sep 28, 2007
    Posts: 89

    PostPosted: Thu May 08, 2008 9:40 am Reply with quote

    Quote:
    I thinks its caused because the top part of the fireball rises much faster than the bottom part, therefore it splits and causes a double fireball, I mean just whatch the Grable video, it is a perfect example. Look at your Avatar, bueschu, that has a bouble fireball effect.

    No, its water vapor sucked again by fireball.

    Double fireball are probably created when the shock wave is so powerful and the fireball exploded low enough to have its fireball intact yet being sliced by shock wave...
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    sonicbomb
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    PostPosted: Thu May 08, 2008 10:16 am Reply with quote

    ^ What you are saying does not make any sense raigainousa
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    Blake
    Tewa (5 mt)


    Joined: Jun 25, 2007
    Posts: 680
    Location: Florida

    PostPosted: Sat May 10, 2008 11:23 pm Reply with quote

    sonicbomb wrote:
    Agreed, but more of a skirt than a second fireball.

    Fizeau


    Yes, I have to agree after watching the video.
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    raigainousa
    King (500 kt)


    Joined: Sep 28, 2007
    Posts: 89

    PostPosted: Tue May 13, 2008 9:35 am Reply with quote

    Quote:
    ^ What you are saying does not make any sense raigainousa


    First, or second statement, sb?
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    sonicbomb
    Forum Admin
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    PostPosted: Tue May 13, 2008 10:42 am Reply with quote

    The second statement about the water vapour, maybe I'm just not understanding what you are suggesting.
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    raigainousa
    King (500 kt)


    Joined: Sep 28, 2007
    Posts: 89

    PostPosted: Wed May 14, 2008 12:55 am Reply with quote

    Sorry, its not water vapor. Sad Its ice crystals. Very Happy

    Please "just" watch a video of Chinese test No. 6. you'll see what Im talking about.
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