Can Air Conditioners Power Jetpacks?

[nst.john]

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.

 

[Drakkith]

How's this vortex going to push you up?

 

[nst.john]

The vortex will be shooting down first pushing you off the ground, then colliding with air molecules to keep you rising.

 

[Drakkith]

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.

 

[nst.john]

That makes more sense.