A hybrid-propellant rocket is a rocket with a rocket motor that uses rocket propellants in two different phases: one solid and the other either gas or liquid. The hybrid rocket concept can be traced back to the early 1930s.
AMROC test of 10,000 pounds-force (44 kN) thrust hybrid rocket motor in 1994 at Stennis Space Center.
LEX French sounding rocket
A transparent portable education demonstrator 3D-printed hybrid rocket fuel grain with dual helical fuel ports, a post-combustion chamber, and a de Laval nozzle, shown prior to hot fire test.
Helical oxidizer injection into a plexiglass hybrid. Image was taken during shutdown, enabling flow pattern to be seen. University of Tennessee at Knoxville.
A rocket is a vehicle that uses jet propulsion to accelerate without using the surrounding air. A rocket engine produces thrust by reaction to exhaust expelled at high speed. Rocket engines work entirely from propellant carried within the vehicle; therefore a rocket can fly in the vacuum of space. Rockets work more efficiently in a vacuum and incur a loss of thrust due to the opposing pressure of the atmosphere.
A Soyuz-FG rocket launches from "Gagarin's Start" (Site 1/5), Baikonur Cosmodrome
Rocket arrows depicted in the Huolongjing: "fire arrow", "dragon-shaped arrow frame", and a "complete fire arrow"
Mysorean rockets and rocket artillery used to defeat an East India Company battalion during the Battle of Guntur
William Congreve at the bombardment of Copenhagen (1807) during the Napoleonic Wars
