Word: liquid-fuel
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...turn of the century was man ready to turn his attention from fanciful to actual space flights. By 1898, a deaf Russian schoolteacher named Konstantin Tsiolkovsky had calculated the mathematical laws of rocket motion and begun to publish scores of articles about space travel. His descriptions of earth satellites, liquid-fuel rockets, space suits, solar energy and the eventual colonization of the solar system, stimulated Russia's insatiable appetite for space travel...
...published a mathematical analysis of a meteorological rocket and pointed out that the same principle could be used to carry a charge of flash powder to the moon, where its ignition would be visible from earth. In 1926, he launched the world's first successful liquid-fuel rocket. It rose...
Soon, European amateurs and scientists alike were also experimenting with rockets, most of them inspired by The Rocket into Interplanetary Space, a booklet published in 1923 by Rumanian Professor Hermann Oberth. German rocketeers eventually constructed a liquid-fuel rocket strikingly similar to Goddard's. By 1942, under the direction of Walter Dornberger and Wernher Von Braun, it had evolved into the dread V2, the first space-age rocket. After the successful test-firing of the V2, Dornberger turned to Von Braun and shouted exultantly: "Do you realize what we accomplished today? Today the spaceship was born...
...program began in 1955, when President Eisenhower directed the Navy to adapt the Army's liquid-fuel Jupiter missile for use on surface ships. This proved impractical, but the Navy within a year had made dramatic progress toward development of its own solid-fuel Polaris missile, and had also overcome many of the technical problems of designing a nuclear-powered submarine. The two programs logically became one. Working side by side, Admirals William F. Raborn (more recently head of the CIA) and Hyman Rickover headed a team that devised a complex navigational device that could plot...
...rocket was a souped-up version of the liquid-fueled Titan II that boosted Gemini astronauts on two successful shots. Strapped on to each side were two 85-ft. rockets, each one containing five 39-ton solid-fuel segments stacked one on top of the other. Within three-tenths of a second of ignition, the two solid-fuel boosters reached their full thrust in unison, lifting the whole package clear of its umbilical tower in four seconds. After 108 sec., with the Titan already 28 miles up, the reddish, rubberlike solid fuel burned out and the core rocket roared...