To create a floating lantern, the primary consideration is ensuring that its total weight is less than the weight of the air it displaces. The envelope's weight and volume are straightforward to measure, while the weight of the hot air inside is temperature-dependent. At room temperature, 24 liters of air weighs approximately 29 grams, and this weight decreases linearly with absolute temperature. Experimentation is necessary to determine the average temperature of the air inside the lantern.
PREREQUISITESHobbyists, engineers, and anyone interested in creating floating lanterns or experimenting with buoyancy and hot air balloon principles.