The Race for the Strategic Ballistic missile 1/5

Race for Ballistic missile missile that follows a sub-orbital ballistic flightpath with the objective of delivering a warhead to a predetermined target. The missile is only guided during the relatively brief initial powered phase of flight and its course is subsequently governed by the laws of orbital mechanics and ballistics. To date, ballistic missiles have been propelled during powered flight by chemical rocket engines of various types.A missile may be largely ballistic but be capable of some evasive maneuvering, as has been claimed for the Bulava under development. In that case the term "quasi-ballistic" is sometimes used.The first ballistic missile was the A-4, commonly known as the V-2 rocket, developed by Nazi Germany in the 1930s and 1940s under direction of Walter Dornberger. The first successful launch of a V-2 was on October 3, 1942 and began operation on September 6, 1944 against Paris, followed by an attack on London two days later. By the end of World War II May 1945 over 3,000 V-2s had been launched.A ballistic missile trajectory consists of three parts: The powered flight portion, the free-flight portion which constitutes most of the flight time, and the re-entry phase where the missile re-enters the Earth's atmosphere.Ballistic missiles can be launched from fixed sites or mobile launchers, including vehicles (Transporter Erector Launchers, TELs), aircraft, ships and submarines. The powered flight portion can last from a few tens of seconds to several minutes and can consist of multiple rocket stages.When in space and no more thrust is provided, the missile enters free-flight. In order to cover large distances, ballistic missiles are usually launched into a high sub-orbital spaceflight; for intercontinental missiles the highest altitude (apogee) reached during free-flight is about 1200 km.The re-entry stage begins at an altitude where atmospheric drag plays a significant part in missile trajectory, and lasts until missile impa Ballistic missiles can vary widely in range and use, and are often divided into categories based on range. Various schemes are used by different countries to categorize the ranges of ballistic missiles: * Battlefield range ballistic missile (BRBM): Range as large as the battlefield it is in. * Medium-range ballistic missile (MRBM): Range between 1000 and 2500 km * Intermediate-range ballistic missile (IRBM) or long-range ballistic missile (LRBM): Range between 2500 or 3000 and 5500 km * Intercontinental ballistic missile (ICBM): Range greater than 5500 km. * Submarine-launched ballistic missile (SLBM): Launched from ballistic missile submarines (SSBNs), all current designs have intercontinental range.Short- and medium-range missiles are often collectively referred to as theatre or tactical ballistic missiles (TBMs). Long- and medium-range ballistic missiles are generally designed to deliver nuclear weapons because their payload is too limited for conventional explosives to be efficient (though the U.S. may be evaluating the idea of a conventionally-armed ICBM for near-instant global air strike capability despite the high costs[1]).The flight phases are like those for ICBMs, except with no exoatmospheric phase for missiles with ranges less than about 350 km

Canal: Science & Technology
Añadido: December 31, 1969 at 3:59 pm
Autor: hagbatana

Duración: 09:49
Puntuación: 4.96
Reproducciones: 5584

Etiquetas: Ballistic  cold  documentary  engineering  mechanics  missile  technology  V2  war  ww2  

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