A pulsed rocket motor is typically defined as a multiple pulseIn medicine, a person's pulse is the throbbing of their arteries as an effect of the heart beat. It can be felt at the neck (carotid artery), at the wrist (radial artery), behind the knee (Popliteal artery), on the inside of the elbow (Brachial artery), near the ankle joint (Posterior Tibial artery), and a few other places. Pressure waves move through the blood vessels, which are pliable; these waves are not caused by the forward movement of the blood. When the heart contracts, blood is ejected into the aorta and ...pulse solid propellantNo quick definition available. propellant rocket motorA rocket engine is a reaction engine that can be used for spacecraft propulsion as well as terrestrial uses, such as missiles. Rocket engines take all their reaction mass from within tankage and form it into a high speed jet, obtaining thrust in accordance with Newton's third law. Most rocket engines are internal combustion engines, although non combusting forms exist.rocket motor. This designDesign, usually considered in the context of the applied arts, engineering, architecture, and other such creative endeavors, is used both as a noun and a verb. As a verb, "to design" refers to the process of originating and developing a plan for a product, structure, or component. As a noun, "a design" is used for both the ...design overcomes the limitation of solid propellant motors that they cannot be easily stopped and reignitied. The pulse rocket motor allows the motor to be burned in segments (or pulses) that burn until completion of that segment. The next segment (or pulse) can be ignited on command by either an onboard algorithmIn mathematics, computing, linguistics, and related disciplines, an algorithm is a finite list of well-defined instructions for accomplishing some task that, given an initial state, will terminate in a defined end-state. The concept of an algorithm originated as a means of recording procedures for solving mathematical problems such as finding the common divisor of two ...algorithm or in pre-planned phase. All of the segments are contained in a single rocket motor case as opposed to stagedrocket]] A multistage (or multi-stage) rocket is a rocket that uses two or more stages, each of which contains its own engines and propellant. A stacked stage is mounted on top of another stage; a parallel stage is attached next to another stage. The result is effectively two or more rockets stacked ... staged rocket motors.
The pulsed rocket motor is made by pouring each segment of propellant separately. Between each segment is a barrier that prevents the other segments from burning until ignited. At ignitionIgnition occurs when the heat produced by a reaction becomes sufficient to sustain a chemical reaction. The sudden change from a cold gas to a hot plasma in a plasma source is also called ignition. Other uses of ignition include: * in chemistry, it refers to heating a material to the point that it spontaneously combusts, or until it ceases to lose mass. * in nuclear fusion, ...ignition of a second pulse the burning of the propellant generally destroys the barrier.
The benefit of the pulse rocket motor is that by the command ignition of the subsequent pulses, near optimal energy management of the propellant burn can be accomplished. Each pulse can have different thrust level, burn time, and achieved specific impulse depending on the type of propellant used, its burn rate, its grain design, and the current nozzle throat diameter.
The Chinese have begun deployment of a two-pulse air-to-air missile the PL-12:For the Australian aircraft, see Transavia PL-12 Airtruk. The PL-12 (PiLi-12) or SD-10 (ShanDian-10) is a BVRAAM (Beyond visual range Air to Air Missile) developed for the People's Liberation Army Air Force & Pakistan Air Force. The early versions are speculated to be a copy of the United States' AIM-120B AMRAAM system, BVRAAMs have become a very important weapon ...PL-12..
