Water Rockets

just air,   4 bar


note how the interior of the bottle suddenly fogs up when the pressure falls

Coke bottle rockets:


water + air,   8 bar:

fixed bottles to see outflow:


Badoit bottle rockets: (very streamlined shape)


water + air,   8 bar:

fixed bottles to see outflow:

+++    BBC "Bang goes the Theory" feature on Water Rockets  +++http://www.bbc.co.uk/bang/handson/waterbottlerockets.shtml