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...regression''' refers to the process by which the fuel grain of a [[hybrid-propellant rocket]] is converted from a solid to a gas that is combusted. It encompass ...ent of Scalable Space-Time Averaged Regression Rate Expressions for Hybrid Rockets |url=https://arc.aiaa.org/doi/10.2514/1.19226 |journal=Journal of Propulsio ...

...light]] capable machines, and the techniques of operating [[aircraft]] and rockets within the [[atmosphere]].<ref>{{Cite web |last=Entropol |title=Definition ...matter/antimatter mixture may be converted to energy, allowing antimatter rockets to have a far higher [[energy density]] and [[specific impulse]] than any o ...

...amic cycle (these cycles are infrequently used but are commonly found in [[hybrid vehicle]]s, along with other vehicles manufactured for [[fuel efficiency]]< ...rpedo]]. Some [[air-independent propulsion|submarines]] carry pure oxygen. Rockets very often use [[liquid oxygen]].<ref> ...