EntityQ51504· pop 32· linked from 778 articlesspecific impulseSign in to savehow efficiently a reaction mass engine creates thrust, which is often proportional to effective exhaust gas velocityConnectionsdelta-vEntitythrust specific fuel consumptionEntityInternational System of UnitsEntityjet engineEntitymetre per secondEntityTupolev Tu-160Entityrocket engineEntityion thrusterEntitykilogram-forceEntityheat of combustionEntityUnited States customary systemEntityRS-25EntityVariable Specific Impulse Magnetoplasma RocketEntitystandard acceleration of free fallEntitypound-forceEntityrocket engine nozzleEntityhydrogenEntitylithiumEntityNASAConceptforceEntityCategoriesClassical mechanicsEngine technologyPhysical quantitiesRocket propulsionSpacecraft propulsion