A solid-propellant rocket or solid rocket is a rocket with a rocket engine that uses solid propellants (fuel/oxidizer). The earliest rockets were solid-fuel rockets powered by gunpowder; they were ...

using both solid and liquid propellants. Rocket-powered vehicles were developed for two primary purposes: spaceflight and weaponry. Guided missiles also appeared in the mid-twentieth century with ...

A space-aged new pan designed by a rocket scientist ... features fins around its outside inspired by heat transfer methods used in jet engines and rockets. Inventors say the fins help to more ...