O.T. RAW POWER AT ITS FINEST

Discussion in 'Australian Motorcycles' started by Aido, Dec 18, 2003.

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  1. Aido

    conehead Guest

    Gawd, if it's not computer geeks, it's boffins.

    Neil must have got his name at uni.
     
    conehead, Dec 22, 2003
    #21

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  2. Aido

    James Mayfield Guest

    JM> Can't be right. Even using litres (smaller than gallons) 1million
    litres
    Yep, but the main burn (which includes the 2 massive booster rockets, not
    just the three engines on the back of the shuttle) lasts a lot longer than
    1.2 seconds.
     
    James Mayfield, Dec 22, 2003
    #22

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  3. Aido

    Hamish Alker-Jones Guest

    Used in early cart racing 60's?

    Hammo
     
    Hamish Alker-Jones, Dec 22, 2003
    #23
  4. Aido

    Hamish Alker-Jones Guest

    Is it compressed?

    Hammo
     
    Hamish Alker-Jones, Dec 22, 2003
    #24
  5. Aido

    Theo Bekkers Guest

    He said liquid. So that would be.... ahellofalotagas.

    I need a scientist! How many metres of gas would that be Hammo?

    Theo
     
    Theo Bekkers, Dec 22, 2003
    #25
  6. Aido

    Hamish Alker-Jones Guest

    Oh, I missed that bit. What you need to know is it stoichiometric
    conditions, flow rates,.....actually just email NASA.....

    Hammo
     
    Hamish Alker-Jones, Dec 23, 2003
    #26
  7. Aido

    Theo Bekkers Guest

    "Hamish Alker-Jones" wrote
    Come-on Hammo. Givus a guesstimate. What does a cubic metre of liquid H2 gas
    out to at NTP? Don't give us that shit about stodgy conditions.

    Theo
     
    Theo Bekkers, Dec 23, 2003
    #27
  8. Aido

    Iain Chalmers Guest

    Well, this page:

    http://www.spinglass.net/scooters/thumb.html

    suggests that liquid H2 weighs 70.8kg/m^3

    1 mole of H2 weighs 2 grams, so 70.8kg would be 35,400 moles, or almost
    800,000 litres at STP.

    So, the originally quoted 2361m^3 of liquid H2 would be just shy of 2
    billion m^3 of gasous H2.

    this page:

    http://www1.msfc.nasa.gov/NEWSROOM/background/facts/ssme.html

    sats the engines burn for 8.5 minutes, or around 500 seconds. So they'd
    be burning around 4 million m^3 of "gasous H2" per second. Except that
    they dont...

    "The engines operate for about eight-and-one-half minutes during liftoff
    and ascent -- long enough to burn more than 500,000 gallons (1.9 million
    liters) of super-cold liquid hydrogen and liquid oxygen propellants
    stored in the huge external tank attached to the underside of the
    Shuttle."

    :)

    big
     
    Iain Chalmers, Dec 23, 2003
    #28
  9. Aido

    Neil Downe Guest

    Iain Chalmers said....

    IC> I found it at

    IC> http://home.austarnet.com.au/mtaylor/500kV_Switch.mpg

    IC> after a bit of poking around...

    You've got me here. I'm trying to pick the mistake in my given URL...

    IC> Its pretty cool :)

    Certainly is. I've seen some scary stuff in HV switchyards, particularly
    on cold damp nights. But never anything like this before. I've seen some
    nasty stuff as a result of electrical explosions too, anything from 240v
    up to 21kv.

    IC> http://images.burningman.com/gallery/petes.10612.jpg

    Yep, the power of electricity....
     
    Neil Downe, Dec 23, 2003
    #29
  10. Aido

    Iain Chalmers Guest

    You've got a space between the V and the S, not an underscore...
    heh heh...

    big
     
    Iain Chalmers, Dec 23, 2003
    #30
  11. Aido

    Knobdoodle Guest

    Knobdoodle, Dec 23, 2003
    #31
  12. Aido

    Knobdoodle Guest

    ~
    It was an underscore when I clicked on it.
    Clem
     
    Knobdoodle, Dec 23, 2003
    #32
  13. Aido

    Knobdoodle Guest

    Hmmmm......
    [steps back and cocks head]
    [realises he looks like a backward cockhead]
    OK; I give up; what's the "cart" reference?
    Clem
     
    Knobdoodle, Dec 23, 2003
    #33
  14. Aido

    Neil Downe Guest

    Knobdoodle said....

    Kn> I thought a couple of millimeters was safe; I didn't know arcs could jump
    Kn> METERS!!!!!

    Limits of approach in 500kv switchyards is 6 metres. Also, if you look
    at transmission line insulators, they may look they're say, 2 metres
    long. But because they're "corrugated", the surface length is over
    double that.

    Kn> Faaaaaaaark!

    Yeah, that's what I said.
     
    Neil Downe, Dec 23, 2003
    #34
  15. Aido

    James Mayfield Guest

    Limits of approach in 500kv switchyards is 6 metres. Also, if you look
    If the spark was travelling through the _AIR_ though (and not through the
    insulator or along a crack in the insulator, or along a bead of water in the
    insulator, etc etc) then it's only the distance from one end of the
    insulator to the other that matters, not the "surface length".
     
    James Mayfield, Dec 23, 2003
    #35
  16. Aido

    Hamish Alker-Jones Guest

    Sorry, got a sick kid presently. Have to keep walking around witrh,
    cleaning up spew, shit and crying, aswell as typing posts that can take half
    an hour, I'll thiunk about it!

    Hammo
     
    Hamish Alker-Jones, Dec 23, 2003
    #36
  17. Aido

    Intact Kneeslider Guest

    Intact Kneeslider, Dec 24, 2003
    #37
  18. Aido

    Knobdoodle Guest

    Knobdoodle, Dec 24, 2003
    #38
  19. Aido

    conehead Guest

    A friend of mine made a field mouse just a couple of feet once
     
    conehead, Dec 25, 2003
    #39
  20. Aido

    sharkey Guest

    sharkey, Dec 25, 2003
    #40

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