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Cryogenic fuel

Cryogenic fuels are fuels that require storage at extremely low temperatures. Cryogenic fuels most often constitute liquefied gases such as hydrogen. Quite often, liquid oxygen is mistakenly called "cryogenic fuel" as well, though it is actually an oxidizer and not a fuel.

Some rocket engines are cooled by circulating their cryogenic fuel around their nozzles before the fuel is pumped into the combustion chamber and ignited. This arrangement was first suggested by Eugen Sänger in the 1940s and is still in use today.

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Cryogenic_fuel". A list of authors is available in Wikipedia.
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