Water rocket launch in slow-motion (3)

Close-up view as I launch the same unmodified 2-litre-bottle, again tethered to a house-brick with a length of braided nylon cord. I use this set-up for indoor demonstrations and wanted to see exactly what is happening in slow-motion. The movie revealed some important details. See how the bottle turns vertical apparently in reaction to the stopper being forced away to one side. This explained why I'd previously noticed that the cord needed to be shorter than expected in order to avoid hitting the ceiling. And I really didn't want to hit the ceiling during indoor demos, because the movie also showed that the bottle reaches a velocity of 100 miles per hour almost immediately after lift-off. Finally, notice how the lightweight, empty, but fast-moving bottle actually lifts that heavy brick clear off the ground...

Category:

Howto & Style

Tags:

• water
• rocket
• rokit
• bottle
• launch

[matty1342]

cool!