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Saphir (rocket)
Saphir VE231 (French, meaning ''sapphire'') was a French sounding rocket. It was part of the "''pierres précieuses''" ("precious stones") family of launch vehicles. Saphir was used between 1965 and 1967 and had a payload capacity of . The rocket could reach a maximum altitude of and produced thrust of at launch. Saphir had a launch mass of , a diameter of and a length of . Saphir was launched 15 times, from July 5, 1965, to January 27, 1967. The Diamant rocket, which carried the first French satellite, Asterix-1, into orbit, was developed from the Saphir with the addition of a third stage. After the successful launch of Diamant, Saphir rockets were used to test technologies for France's burgeoning intercontinental ballistic missile development—namely radio and inertial guidance, warhead separation, and ablative heat shielding of a re-entry vehicle. See also * French space program The French space program includes both commercial spaceflight, civil and military spaceflig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sud Aviation
Sud Aviation (, ''Southern Aviation'') was a French state-owned aircraft manufacturer, originating from the merger of Sud-Est (SNCASE, or ''Société nationale des constructions aéronautiques du sud-est'') and Sud-Ouest (SNCASO or ''Société nationale des constructions aéronautiques du sud-ouest'') on 1 March 1957. Both companies had been formed from smaller privately owned corporations that had been nationalized into six regional design and manufacturing pools just prior to the World War II, Second World War. The company became a major manufacturer of helicopters, designing and producing several types which went on to be built in large numbers, including the Aérospatiale Alouette II, Alouette II (the first production helicopter powered by a gas turbine engine; first flight in 1955), the Aérospatiale SA 330 Puma, Puma (1965) and Aérospatiale Gazelle, Gazelle (1967). During 1967, an agreement between the British and French governments arranged for joint production and procur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intercontinental Ballistic Missile
An intercontinental ballistic missile (ICBM) is a ballistic missile with a range greater than , primarily designed for nuclear weapons delivery (delivering one or more thermonuclear warheads). Conventional, chemical, and biological weapons can also be delivered with varying effectiveness, but have never been deployed on ICBMs. Most modern designs support multiple independently targetable reentry vehicles (MIRVs), allowing a single missile to carry several warheads, each of which can strike a different target. Russia, the United States, China, France, India, the United Kingdom, and North Korea are the only countries known to have operational ICBMs. Early ICBMs had limited precision, which made them suitable for use only against the largest targets, such as cities. They were seen as a "safe" basing option, one that would keep the deterrent force close to home where it would be difficult to attack. Attacks against military targets (especially hardened ones) still demanded th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Experimental Rockets
An experiment is a procedure carried out to support or refute a hypothesis, or determine the efficacy or likelihood of something previously untried. Experiments provide insight into cause-and-effect by demonstrating what outcome occurs when a particular factor is manipulated. Experiments vary greatly in goal and scale but always rely on repeatable procedure and logical analysis of the results. There also exist natural experimental studies. A child may carry out basic experiments to understand how things fall to the ground, while teams of scientists may take years of systematic investigation to advance their understanding of a phenomenon. Experiments and other types of hands-on activities are very important to student learning in the science classroom. Experiments can raise test scores and help a student become more engaged and interested in the material they are learning, especially when used over time. Experiments can vary from personal and informal natural comparisons (e. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
French Space Program
The French space program includes both commercial spaceflight, civil and military spaceflight activities. It is the third oldest national space program in the world, after the Soviet space program, Soviet (now Roscosmos, Russian) and Space policy of the United States, American space programs, and the largest space program in Europe. Background Space travel has long been a significant ambition in French culture. From the Gobelins Manufactory, Gobelins' 1664 tapestry representing a space rocket, to Jules Verne's 1865 novel ''From the Earth to the Moon'' and George Méliès' 1902 film ''A Trip to the Moon'', space and rocketry were present in French society long before the technological means appeared to allow the development of a space exploration program. During the late 18th century, Jean-François Pilâtre de Rozier, Jacques Charles and the Montgolfier brothers are seen as worldwide precursors and explorers of aeronautics, with the world record altitude then reached by a human a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Re-entry Vehicle
Atmospheric entry is the movement of an object from outer space into and through the gases of an atmosphere of a planet, dwarf planet, or natural satellite. There are two main types of atmospheric entry: ''uncontrolled entry'', such as the entry of astronomical objects, space debris, or bolides; and ''controlled entry'' (or ''reentry'') of a spacecraft capable of being navigated or following a predetermined course. Technologies and procedures allowing the controlled atmospheric ''entry, descent, and landing'' of spacecraft are collectively termed as ''EDL''. Objects entering an atmosphere experience atmospheric drag, which puts mechanical stress on the object, and aerodynamic heating—caused mostly by compression of the air in front of the object, but also by drag. These forces can cause loss of mass (ablation) or even complete disintegration of smaller objects, and objects with lower compressive strength can explode. Crewed space vehicles must be slowed to subsonic speeds be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heat Shield
In thermodynamics, heat is defined as the form of energy crossing the boundary of a thermodynamic system by virtue of a temperature difference across the boundary. A thermodynamic system does not ''contain'' heat. Nevertheless, the term is also often used to refer to the thermal energy contained in a system as a component of its internal energy and that is reflected in the temperature of the system. For both uses of the term, heat is a form of energy. An example of formal vs. informal usage may be obtained from the right-hand photo, in which the metal bar is "conducting heat" from its hot end to its cold end, but if the metal bar is considered a thermodynamic system, then the energy flowing within the metal bar is called internal energy, not heat. The hot metal bar is also transferring heat to its surroundings, a correct statement for both the strict and loose meanings of ''heat''. Another example of informal usage is the term '' heat content'', used despite the fact that p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inertial Guidance
An inertial navigation system (INS) is a navigation device that uses motion sensors (accelerometers), rotation sensors ( gyroscopes) and a computer to continuously calculate by dead reckoning the position, the orientation, and the velocity (direction and speed of movement) of a moving object without the need for external references. Often the inertial sensors are supplemented by a barometric altimeter and sometimes by magnetic sensors ( magnetometers) and/or speed measuring devices. INSs are used on mobile robots and on vehicles such as ships, aircraft, submarines, guided missiles, and spacecraft. Other terms used to refer to inertial navigation systems or closely related devices include inertial guidance system, inertial instrument, inertial measurement unit (IMU) and many other variations. Older INS systems generally used an inertial platform as their mounting point to the vehicle and the terms are sometimes considered synonymous. Overview Inertial navigation is a self-cont ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diamant
The Diamant rocket (French for "diamond") was the first exclusively French expendable launch system and at the same time the first satellite launcher not built by either the United States or USSR. As such, it has been referred to as being a key predecessor for all subsequent European launcher projects. During 1962, development of the Diamant commenced as the inaugural spacecraft project of France's space agency, the Centre National d'Études Spatiales (CNES). As a project, it was derived from the military program ''Pierres précieuses'' (fr.: gemstones) that included the five prototypes Agate, Topaze, Emeraude, Rubis and Saphir (Agate, Topaz, Emerald, Ruby and Sapphire), and drew heavily upon the knowledge and technologies that had been previously developed. On 26 November 1965, the Diamant A performed its maiden flight. Out of a total of 12 launch attempts to be performed between 1965 and 1975, 9 of these were successful. Most notably, on 26 November 1965, the Diamant was u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sounding Rocket
A sounding rocket or rocketsonde, sometimes called a research rocket or a suborbital rocket, is an instrument-carrying rocket designed to take measurements and perform scientific experiments during its sub-orbital flight. The rockets are used to launch instruments from 48 to 145 km (30 to 90 miles) above the surface of the Earth, the altitude generally between weather balloons and satellites; the maximum altitude for balloons is about 40 km (25 miles) and the minimum for satellites is approximately 121 km (75 miles). Certain sounding rockets have an apogee between 1,000 and 1,500 km (620 and 930 miles), such as the Black Brant X and XII, which is the maximum apogee of their class. Sounding rockets often use military surplus rocket motors. NASA routinely flies the Terrier Mk 70 boosted Improved Orion, lifting 270–450-kg (600–1,000-pound) payloads into the exoatmospheric region between 97 and 201 km (60 and 125 miles). Etymology The origin of the term ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Topaze (rocket)
Topaze is the designation of a French sounding rocket. The Topaze was developed by several French companies, notably Nord Aviation and Sud Aviation, // ''Aviation Week & Space Technology'', January 7, 1963, v. 78, no. 1, p. 37. and built by SEREB (a of Nord and Sud, now known as ) and was the first guidable French sounding rocket. The Topaze was launched 14 times from the CIEES launch site in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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