e/Liquid air cycle engine

Information
has gloss	eng: A Liquid Air Cycle Engine (LACE) is a type of spacecraft propulsion engine that has never flown that attempts to gain efficiency by gathering part of its oxidizer from the atmosphere. In a LOX/LH2 bipropellant rocket the liquid oxygen needed for combustion is the majority of the weight of the spacecraft on lift-off, so if some of this can be collected from the air on the way, it might dramatically lower the take-off weight of the spacecraft.
lexicalization	eng: Liquid Air Cycle Engine
instance of	e/Single-stage-to-orbit