FIRE UP THE
1. This project involves open flame and uses propane.
It should be attempted only by adults, or under the
close supervision of adults. The metal surfaces get
very hot; do not touch them until they are cool.
2. Operate this device on a nonflammable surface
and keep combustible objects well away from the
3. Use the flame tube only in a well-ventilated space.
Gas leaks are a possibility.
4. Keep a fire extinguisher handy.
Open the gas valve, slowly. Using the long-handled lighter, ignite the gas jetting out of
the exhaust ports (the holes at the top of the
tube). Adjust the gas pressure so each flame
is about ¾" high. The height of all flames
should be equal. If they’re unequal, turn off
the gas and clean any clogged holes by reaming them with music wire or redrilling.
Turn on the frequency generator and amplifier and set it to 440Hz. The frequency of the
sound wave should be visible as a pattern of
repeating high and low flames jetting from the
holes on the pipe.
Experiment with different frequencies to
see different patterns and wave shapes.
Play Some Music
Replace the frequency generator with a music
source and experiment with different types
of music to understand how they affect the
pulse and shape of the flames.
If you have trouble keeping all exhaust
ports lit during loud musical passages, try
covering the last 6" of holes on both ends
with aluminum tape. ;
See a video of the flame tube in action:
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