we don't have to use those as a matter of fact it wasn't designed that way initially at all the solid uh propellant rockets were a uh you know were time saving money saving afterthought
Solid rocket propellants are the most expensive rocket fuel.
mnli hypothesis: Solid rocket propellants are the most expensive rocket fuel. premise: we don't have to use those as a matter of fact it wasn't designed that way initially at all the solid uh propellant rockets were a uh you know were time saving money saving afterthought