1. Priciples of the Hot Air Balloon
... common being propane fuels. Propane is preferred over other hydrocarbons because its low boiling point allows a consistently higher vapor pressure for a given temperature, and is therefore a more efficient fuel. Hot air balloon is still used for recreation and scientific experiments, including Cosmic Microwave Background studies and astronomy. With the high number of uncertainties in steering balloons, it is crucial then ... , Propane is retrieved from petroleum fractions and is therefore non-renewable. With the peak oil point expected to fall within the century , the question of fuel ef...
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- Grade Level: High School