propellant grain

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• Grain (disambiguation) — Grain refers to course particles (e.g. grain of sand , grain of salt ): *Grain is the small, hard, fruits or seeds of arable crops. Commonly grasses (see caryopsis, Cereals). *Film grain, the gritty texture sometimes apparent on images produced… …   Wikipedia

• grain — grainer, n. grainless, adj. /grayn/, n. 1. a small, hard seed, esp. the seed of a food plant such as wheat, corn, rye, oats, rice, or millet. 2. the gathered seed of food plants, esp. of cereal plants. 3. such plants collectively. 4. any small,… …   Universalium

• grain — /greɪn / (say grayn) noun 1. a small hard seed, especially a seed of one of the cereal plants: wheat, rye, oats, barley, maize, or millet. 2. the gathered seeds of cereal plants in the mass. 3. the plants themselves, whether standing or gathered …  

• grain — n. & v. n. 1 a fruit or seed of a cereal. 2 a (collect.) wheat or any allied grass used as food, corn. b (collect.) their fruit. c any particular species of corn. 3 a a small hard particle of salt, sand, etc. b a discrete particle or crystal, usu …   Useful english dictionary

• Rocket propellant — is mass that is stored, usually in some form of propellant tank, prior to being used as the propulsive mass that is ejected from a rocket engine in the form of a fluid jet to produce thrust.Chemical rocket propellants are most commonly used,… …   Wikipedia

• Ammonium perchlorate composite propellant — (APCP) is a modern solid rocket propellant used in both manned and unmanned rocket vehicles. It differs from many traditional solid rocket propellants such as black powder or Zinc Sulfur, not only in chemical composition and overall performance,… …   Wikipedia

• Rocket engine — RS 68 being tested at NASA s Stennis Space Center. The nearly transparent exhaust is due to this engine s exhaust being mostly superheated steam (water vapor from its propellants, hydrogen and oxygen) …   Wikipedia

• Internal ballistics — Internal ballistics, a subfield of ballistics, is the study of a projectile s behavior from the time its propellant s igniter is initiated until it exits the gun barrel. The study of internal ballistics is important to designers and users of… …   Wikipedia

• S-520 — is the designation of a Japanese sounding rocket. The S 520 is a powerful single stage rocket which is optionally equipped with three axis attitude control and a recovery system. It has a capability for launching a 100 kg payload far above 300 km …   Wikipedia

• Opacifier — An opacifier is a substance added to a material in order to make the ensuing system opaque. An example of a chemical opacifier is tin dioxide (SnO2), which is used to opacify ceramic glazes[1] and milk glass; bone ash is also used. Opacifiers… …   Wikipedia

• Bloc De Poudre — Un bloc de poudre, dans le domaine de l astronautique, est un bloc de propergol solide, coulé dans une enveloppe ou préformé, dont la forme est adaptée à une évolution déterminée de la surface de combustion. Les termes correspondants en anglais… …   Wikipédia en Français