The Physics of Jetpacks?

  1. Jun 29, 2013 #1
    I saw a working jetpack shown on a tv show on the science channel and it got me thinking how exactly we can make the perfect jetpack. I came up with an idea. AIR CONDITIONERS! Bear with me, just as how a tornado is a vortex of cold and warm winds and can have all that speed and strength, we can make our own vortex using air conditioner-like power sources, cooling the air and then coming out of a hole making a vortex, like smoke makes a vortex when hit out of a drum.
     
  2. jcsd
  3. Jun 29, 2013 #2

    Drakkith

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    Staff: Mentor

    How's this vortex going to push you up?
     
  4. Jun 29, 2013 #3
    The vortex will be shooting down first pushing you off the ground, then colliding with air molecules to keep you rising.
     
  5. Jun 29, 2013 #4

    Drakkith

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    Staff: Mentor

    I'm not sure, but I think just shooting exhaust straight down is more efficient than trying to make a vortex. You're using up a lot of energy to make this vortex only to have most of its energy be in the direction of rotation and not pushing you anywhere.
     
  6. Jun 29, 2013 #5
    That makes more sense.
     
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