Recent Examples of nitrogen tetroxide from the Web
This shrinking market has opened the door to the Angara rocket, which has the advantage of not using environmentally hazardous fuel for each of its stages—Proton engines used nitrogen tetroxide and unsymmetrical dimethylhydrazine.
In modern rockets, such as the Space X Falcon 9 or the Saturn V, the propulsion system is powered by a fast, exothermic reaction between a liquid fuel (usually hydrogen, methane or hydrazine) and oxidizer (usually oxygen or nitrogen tetroxide).
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