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How to Make a Model Volcano Pyroclastic Flow
Edited by Flickety, MA, Maluniu, Cassie Leigh and 8 others
Many model volcanoes use baking soda and vinegar to produce a lava flow. This is for those interested in producing true stratovolcanic pyroclastic flow complete with ash and smoke.
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EditSteps
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1This should only be done or supervised by an adult. It should only be done outside in an open area. All fire safety precautions should be taken.Ad
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2Build a model volcano using a metal soup can as the vent.
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3Mix together powdered sugar and salt petre aka potassium nitrate (available at garden store) in a 60% potassium nitrate to 40% sugar weight ratio to make about 50 grams.
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4Fill vent with mix and place a model rocket engine igniter (available at hobby store) into the mix.
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5Attach 25 ft. of speaker wire with alligator clips to the igniter and run the wire away from volcano. Make sure the igniter tip is buried in the mixture.
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6Fill vent all the way to the top (and overflowing if you like) with ash from a fireplace (optional, but really cool).
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7Stand back and touch the tips of the wires to a 9 volt battery (it doesn't matter which wires touch which electodes).Ad
EditTips
- Grind up the salt petre so it reacts quicker
- Use basic electronics (Radio Shack) to rig a control switch or better yet a cool detonation box.
- Rig the wires up through the vent to hide them
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EditWarnings
- This is a fire hazard. Only to be done outside in an open space
- Volcano will be hot after eruption. Handle with care
- Stand at least 25 ft. away to avoid flying particles
EditThings You'll Need
- Sugar
- Salt Petre (potassium Nitrate)
- Speaker wire
- alligator clips
- 9V battery
- Model rocket engine igniter
- Soup can
- Switch (optional)
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