| Minto wheel | |
|---|---|
 Minto wheel rotating through heated water | |
| Classification | Heat engines |
| Application | Toy, Scientific demonstration |
| Fuel source | Heat transfer |
| Components | Bulbs, Tubes, Axle |
The Minto wheel is a heat engine named after Wally Minto. The engine consists of a set of sealed chambers arranged in a circle, with each chamber connected to the chamber opposite it. One chamber in each connected pair is filled with a liquid with a low boiling point (propane (TB = −42 °C) and R-12 (TB = −29.8 °C) are listed in the Mother Earth News articles). Ideally, the working fluid also has a high vapor pressure and density.