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### Course: Physics archive>Unit 12

Lesson 10: Thermo can

# Thermo can

This project shows how to power a boat with a candle. Created by Karl Wendt.

## Want to join the conversation?

• Amazing, a project that anyone can do.
Besides the chemical potential energy is transformed into kinetic energy and cold air is heated, what other physical principles allow the boat to move?
What physical-mathematical model can predict the speed of the boat?
• The expanding hot air creates a vacuum which sucks in the cold air in front of the can.
• isn't that how a jet engine works? (mostly)
• P.S. Cool project, you have to do one on Putt-Putt Boats ( flash steam ) using a candle.
• is the top of the can open? like the part where you drink? or is it closed?
• It is open. At about 3 minutes the can turns so you can see it. Hope this helps!
(1 vote)
• If we use another colour for the cloth than it will work or not?
(1 vote)
• Yes, any color will work. The black was what Karl had at the time.
• what is the main basic of thermo can?
• It works on the principle of Conversion of energy. As we know the energy is neither created nor destroyed, only changes it forms. The energy emitted by candle in form of heat is transferred into kinetic energy which results in movement of boat.Obviously , to have maximum use of the same design of can is important.
(1 vote)
• what is the principle behind the can moving?
• cold air is heated and then expands through the back pushing it in the oppisite direction
• very interesting

How fast can the thermo can go?
• it depends on how strong the metal is you could make it faster with more candles but too many make it sink
(1 vote)
• how does the thermo can work?
(1 vote)
• it uses the heat of the candle. when we will put more candles it will go fast.