Cryogenic fuel

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Cryogenic fuels - condensed fuel mixtures, liquid cooled gases such as hydrogen, methane and oxygen. Liquid gases, primarily hydrogen, achieve the best combustion energy ratio to their mass, unattainable for other fuels. Used in rocket propulsion, research is conducted on the use of ultrasonic intercontinental flights. By 2050, it is planned to introduce unspalged travel around the world with the help of cryogenic fuels (hydrogen and oxygen will merge into steam) and biofuels.

Example usage: American Delta IV, European Ariane 5, and Japanese H-IIA.

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