Chemistry & Science
Experiments

Whistle Mix

WHISTLE MIX

Potassium
Perchlorate

70
%

Sodium Benzoate

30
%

Be
careful, this is a high energy mixture that can explode with
friction/impact.
Grind the Potassium Perchlorate ALONE in a mortar
& pestle until it is a very fine powder (unless it's that way
already). Do the same to the Sodium Benzoate unless it is already as fine
as Talcum Powder. Note that the Sodium Benzoate must be VERY fine, and
mixed VERY well with the Potassium Perchlorate for this mixture to work
properly.
Pass the mixture through a screen several times to mix
the two together. It is important that this formula be mixed very well and
be in a fine powered state. Pour the Whistle Mix into a zip-loc plastic
baggie, seal it, and shake it back & forth just to make sure the
composition is well mixed.
Don't ever grind
the two together as the mixture may explode.
Never grind, pound, or subject this mixture to friction as
it may explode.
To make a Whistle, seal off
one end of a heavy wall cardboard tube (like our 4 ounce rocket tube) with
Plaster of Paris or a quantity of heat glue, or some rocket nozzle mix.
Using a wooden dowel the same diameter as the inside of the tube, press
small increments of Whistle Mix into the tube. Press hard to pack it in,
but do not bang on the dowel. Fill the tube only 1/2 full (whistles need a
lot of empty space in the tube). Stick in a length of Visco Safety Fuse
and make sure it touches the powder inside. Push the tube into the ground
so it stays put, stand back and light the fuse. The larger diameter the
tube, the louder
whistle.