Back Flüssigkeitsraketentriebwerk ALS صاروخ ذو وقود سائل Arabic Coet de combustible líquid Catalan مووشەکی سووتەمەنیی شل CKB Raketový motor na kapalné pohonné látky Czech Flüssigkeitsraketentriebwerk German Propulsor de combustible líquido Spanish Vedelkütusrakett Estonian موشک با سوخت مایع Persian Nesteraketti Finnish
A liquid-propellant rocket or liquid rocket uses a rocket engine burning liquid propellants. (Alternate approaches use gaseous or solid propellants.) Liquids are desirable propellants because they have reasonably high density and their combustion products have high specific impulse (Isp). This allows the volume of the propellant tanks to be relatively low.