Scouts-L Mail Archive for June of 1999: Coke bottle rockets
Coke bottle rockets
Wed, 2 Jun 1999 08:45:05 -0500
I had sooooo many people asking about my coke bottle rockets as an
activity at a camp that I figured I better make the idea a bit more clear.
You take a 3 foot section of plastic 3/4 inch (I think, but I would suggest
you take a bottle to the store with you to prefit) pipe. Cut off a 2 inch piece
and glue it back on with a coupler. On the other end, I put a 90 degree
bend. Then some adaptors that tie it to a long (20 feet at least) air hose
connected to a compresser or hand air pump with a valve somewhere in
between. Set the output pressure at about 30 to 40 pounds. Poof...You
now have a launch pad.
For the rockets, you will need some 2 liter or smaller plastic bottles
(coke, pepsi,7-up,RC cola, or even water bottles). You can add fins if you
want, but they will work just fine without fins. Fill the bottle about 1/2 full
of water and invert onto the launcher and hold on tightly. Somebody turns
the valve open to allow air into the rocket and after a couple of seconds
you let go and the rocket shoots into the air. A 100 feet or more.
A barrel or small pool is an easy way for the kids to fill their rockets with
the water. Be careful with the air pressure as too high a pressure could
make the bottles launch too high. I don't think you could blow up a bottle
because the kids can't hold on that long. The major problem is to make sure
you keep the inch of tube above the connector very clear of dirt and
likewise the inside neck of the bottles becasuse of the tight fit.
I have been doing this event for years and the kids love it. If you plan
on using an electric air compressor, make sure the air hose is long enough
to keep it and all electric cords away from the launch area as there will be
a bunch of water.
Good luck on your launchings. YiS Terry