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Good Clean Fun

On Sunday, S0 and I went over to the school playground for the “Rocket Day,” where you could experiment with launching plastic bottles using air pressure. Hey, how could we resist ?

Four dads with kids from older classes supplied the launchers, but anybody could join in the fun. The launchers ranged from simplicity itself (mere tape supplying the friction to hold the rocket back while air was pumped in) to the elaborate (a finely-crafted wooden unit with separate metal braces for releasing after you had pressurized the bottle). You could experiment with putting various amounts of water in the bottle. Some people had bottles outfitted with fins and nosecones. However, we found that bigger was better, and that 2-liter bottles (of which we brought the first) launched impressively even without modification.

And it goes a little something like this (MPEG-4/QuickTime 6, 1.3 MB).

Comments

( 4 comments — Leave a comment )
salaryman
Oct. 20th, 2003 08:58 pm (UTC)
(smiling broadly)
that is an awesome video.

I just watched it twice in a row. I'm going to go watch it again.

rpkrajewski
Oct. 20th, 2003 09:16 pm (UTC)
Re: (smiling broadly)
Thank you ! PV = nRT is a wonderful thing…

Here are two more: good screams (1.5 MB) and great noise (1.2 MB).
all_askew
Oct. 21st, 2003 05:34 am (UTC)
That is a really fun video. What a great idea that "Rocket Day" is!

We should organize one for adults.
rpkrajewski
Oct. 21st, 2003 05:50 am (UTC)
Except this time we'll use rocket fuel !
( 4 comments — Leave a comment )

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