Now a days I have more time. I started a whole lot of projects. One was the hand held water bottle rocket. I'm sure a lot of people have a lot of criticism about how dumb it is to hold that bottle and to not use any eye protection. I agree and I don't recommend this method. In my defense the system to pressurize it was a well regulated air compressor at only 45psi. Well below the maximum these specific bottles can withstand and also limiting the height they could reach.
A sideways launch towards a wooden target
My friend defending his car from hurls of stale bread being thrown at it.
My pneumatic launcher I built when I was in high school for a science project also launching stale Kirkland bread. The accuracy for this has always been spectacular. Don't worry everything we launched landed in the yard and nothing heavy or dangerous was ever used. Although that bread from Kirkland could be considered poisonous. ;-)
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