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Emeraude (rocket)
Émeraude VE121 (French for "emerald") was a large French sounding rocket of the 1960s. It built on the experiences of the Véronique and Vesta programs, and though it was only used for one year, it tested important technologies that were used in later French launch vehicles, from the Topaze and Saphir sounding rockets to the Diamant, the multi-stage orbital rocket that was used to launch France's first satellite, the Asterix-1. Emeraude was launched exclusively from the Centre interarmées d'essais d'engins spéciaux (CIEES) launch site in Hammaguir, Algeria. Its codename, VE121, means Vehicle Experimental; 1 stage, liquid propellant (code 2), guided (code 1). The rocket was liquid-fueled and carried 12.8 tonnes of fuel and oxidizer—nitric acid and gasoline turpentine—which were pressure-fed into the four Vexin-B engines, providing a total of 301.55 kN of thrust. Pitch and yaw control were provided by gimbaling the four engines while roll control was provided by aerodynam ... [...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] |
Dummy Payload
A boilerplate spacecraft, also known as a mass simulator, is a nonfunctional craft or payload that is used to test various configurations and basic size, load, and handling characteristics of rocket launch vehicles. It is far less expensive to build multiple, full-scale, non-functional boilerplate spacecraft than it is to develop the full system (design, test, redesign, and launch). In this way, boilerplate spacecraft allow components and aspects of cutting-edge aerospace projects to be tested while detailed contracts for the final project are being negotiated. These tests may be used to develop procedures for mating a spacecraft to its launch vehicle, emergency access and egress, maintenance support activities, and various transportation processes. Boilerplate spacecraft are most commonly used to test crewed spacecraft; for example, in the early 1960s, NASA performed many tests using boilerplate Apollo spacecraft atop Saturn I rockets, and Mercury spacecraft atop Atlas rocke ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pogo Oscillation
Pogo oscillation is a self-excited vibration in liquid-propellant rocket engines caused by combustion instability. The unstable combustion results in variations of engine thrust, causing variations of acceleration on the vehicle's flexible structure, which in turn cause variations in propellant pressure and flow rate, closing the self-excitation cycle. The name is a metaphor comparing the longitudinal vibration to the bouncing of a pogo stick. Pogo oscillation places stress on the frame of the vehicle, which in severe cases can be dangerous. Origin In general, pogo oscillation occurs when a surge in engine pressure increases back pressure against the fuel coming into the engine, reducing engine pressure, causing more fuel to come in and increasing engine pressure again. Flexing of fuel pipes can also induce fluctuations in fuel pressure. If the cycle happens to match a resonance frequency of the rocket then dangerous oscillations can occur through positive feedback, which can, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Newton (unit)
The newton (symbol: N) is the unit of force in the International System of Units (SI). It is defined as 1 kg⋅m/s, the force which gives a mass of 1 kilogram an acceleration of 1 metre per second per second. It is named after Isaac Newton in recognition of his work on classical mechanics, specifically Newton's second law of motion. Definition A newton is defined as 1 kg⋅m/s (it is a derived unit which is defined in terms of the SI base units). One newton is therefore the force needed to accelerate one kilogram of mass at the rate of one metre per second squared in the direction of the applied force. The units "metre per second squared" can be understood as measuring a rate of change in velocity per unit of time, i.e. an increase in velocity by 1 metre per second every second. In 1946, Conférence Générale des Poids et Mesures (CGPM) Resolution 2 standardized the unit of force in the MKS system of units to be the amount needed to accelerate 1 kilogram of mass at the rate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
French Algeria
French Algeria (french: Alger to 1839, then afterwards; unofficially , ar, الجزائر المستعمرة), also known as Colonial Algeria, was the period of French colonisation of Algeria. French rule in the region began in 1830 with the invasion of Algiers and lasted until the end of the Algerian War of Independence in 1962. While the administration of Algeria changed significantly over the 132 years of French rule, the Mediterranean coastal region of Algeria, housing the vast majority of its population, was an integral part of France from 1848 until its independence. As one of France's longest-held overseas territories, Algeria became a destination for hundreds of thousands of European immigrants known as ''colons'', and later as . However, the indigenous Muslim population remained the majority of the territory's population throughout its history. Many estimates indicates that the native Algerian population fell by one-third in the years between the French invasion a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centre Interarmées D'essais D'engins Spéciaux
The Interarmy Special Vehicles Test Centre (CIEES) (French language, French: Centre Interarmées d'Essais d'Engins Spéciaux) was France's first space launch and ballistic missile testing facility. Outside France, the facility is often referred to by the name of the nearest town, Hammaguir (also called Hammaguira). It was established on 24 April 1947, by ministerial decree as the Special Weapons Test Center (CEES, ''Centre d'essais d'engins spéciaux'') for use by the French Army. In 1948, it was turned over to the French Air Force, who renamed it CIEES. Its remote location in the middle of the Saharan Desert and its relative closeness to the Equator (compared with Metropolitan France) made it an attractive launch site for missiles and orbital rockets. History The origins of CIEES and the French missile and space program date to the end of the Second World War. On 12 June 1945, less than a month after V-E Day, the War Department ordered the study of self-propelled projectiles (rock ... [...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] |
Véronique (rocket)
Véronique was a French liquid-fuelled sounding rocket of the 1950s. It was the first liquid-fuel research rocket in Western Europe. Véronique was a French-led project that had its roots in the German V-2 rocket, and was partially developed by German scientists who had worked in Peenemünde. It was a successor to the cancelled Super V-2, the Véronique was built between 1950 and 1969 in several versions, of which the versions P2, P6 and R were only experimental models. They were made in Vernon, Eure. The name Veronique is a portmanteau of ''Vernon-électronique'', and is also a common French first name. On 20 February 1959, the first Véronique launch was performed, although it was recorded as a failure. One day later, the second launch took place, which attained an altitude of . The last Veronique-61 was launched on 31 May 1974. The programme was eclipsed by new rockets, such as the wholly indigenous Diamant launcher. History Background In the immediate aftermath of the Second ... [...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] |
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] |
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