Worlds of David Darling > Children's
Encyclopedia of Science > Could You Ever Fly to the Stars? > Hands On
COULD YOU EVER FLY TO THE STARS?
a book in the Could You Ever? series by David Darling
Build a rocket engine from a chicken's egg
This engine works by the same principle as the engines of future starships.
Its jet of steam allows it to propel a simple boat.
You will need:
Wash the outside of the egg and pierce a tiny hole through it, from end
to end, using the knitting needle. Hold the egg over a basin and blow through
one of the holes. The yolk and white of the egg will come out of the hole
at the other end of the shell and fall into the basin. Hold the eggshell
under water and remove it when it is about half full. Put your fingers over
the holes and shake it to clean the inside. Blow out the contents, then
rinse the eggshell again in the same way. Now dry the outside of the shell
and seal one of the holes with a blob of thick glue. Leave the glue to set.
- An uncracked raw chicken's egg
- A fine knitting needle
- A basin
- All-purpose glue
- A metal foil food container
- A paper clip
- A few inches of stiff wire
- A candle
Make the boat from the metal food container. Trim the sides with scissors
and bend one end to form the boat's curved bow. Clip a small flap of scrap
foil to the stern of the boat to act as a rudder. Bend the piece of wire
to form a cradle for the eggshell. Cut a small piece from the top of the
candle. Hold the shell underwater so that a little water enters. Do not
let too much in as it will take a long time to boil. Using hand-hot water
will speed things up. Arrange the candle stump, wire frame, and shell as
shown and light the candle with an adult's help. After a few minutes, the
boat will move forward, driven by the thrust of the eggshell rocket.