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Arocket launcher is a device, most often aweapon, that launches anunguided, rocket-propelled projectile. The projectile contains at least one component of what is called awarhead, which is usuallyexplosive.
The purpose of the projectile launched, the "rocket", depends on the situation. For example, there are rockets with warheads designed specifically toexplode and pierce through heavyvehicle armor such as those oftanks (HEAT warheads), and are henceanti-tankexplosive weapons. Rockets may contain aguidance system and an ability to steer towards targets, theseguided rockets are called "missiles"; however this article will be focusing on thelaunchers ofunguided rockets. The launcher itself is usually a tube or multiple tubes containing the rockets and can be carried by a crew or be attached to a vehicle.
Early examples appeared in imperial China as arrow-mounted rocket motors and organized multi-tube launchers, and the technology later spread worldwide, producing forms such as the Congreve rockets used in the early 19th century and experimental systems used in the American Civil War. In the 20th century, rocket launchers became a major class of military weapons. During and after World War II, vehicle-mounted multiple rocket launchers were developed, along with a variety of shipborne, ground and air launch systems, while the postwar era saw the introduction of widely used shoulder-fired anti-tank systems, and aircraft rocket pods for close air support.



The earliest rocket launchers documented inimperial China consisted ofarrows modified by the attachment of a rocket motor to the shaft a few inches behind the arrowhead. The rocket was propelled by the burning of theblack powder in the motor; these should not be confused withearly fire arrows, which were conventional arrows carrying small tubes of black powder as anincendiary that ignited only after the arrow hit its target. The rocket launchers were constructed of wood, basketry, andbamboo tubes.[1] The launchers divided the rockets with frames meant to keep them separated, and the launchers were capable of firing multiple rockets at once. Textual evidence and illustrations of various early rocket launchers are found in the 1510 edition of theWujing Zongyao translated by Needham and others atPrinceton University. (The originalWujing Zongyao was compiled between 1040 and 1044 and described the discovery of black powder but preceded the invention of the rocket. Partial copies of the original survived andWujing Zongyao was republished in 1231 during theSouthern Song dynasty, including military developments since the original 1044 publication. The British scientist, sinologist, historianJoseph Needham asserts that the 1510 edition is the most reliable in its faithfulness to the original and 1231 versions, since it was printed from blocks that were re-carved directly from tracings of the edition made in 1231 AD.) The 1510Wujing Zongyao describes the "long serpent" rocket launcher, a rocket launcher constructed of wood andcarried with a wheelbarrow, and the "hundred tiger" rocket launcher, a rocket launcher made of wood and capable of firing 320 rocket arrows.[2] The text also describes a portable rocket carrier consisting of a sling and a bamboo tube.[3]
Rocket launchers known as "wasp nest" launchers were used by theMing dynasty in 1380 and in 1400 byLi Jinglong againstZhu Di.[4]
Rockets were introduced to theWest during theNapoleonic Wars; theCongreve rocket was a British weapon devised bySir William Congreve in 1804 after experiencingIndian rockets at theSiege of Seringapatam (1799). Congreve rockets were launched from an iron trough about 18 inches (46 centimetres) in length, called achamber.[5] These chambers could be fixed to the ground for horizontal launching, secured to a folding coppertripod for high angle fire or mounted on frames on carts or the decks of warships.[6]
The collection of the royal armies includes man-portable rocket launchers that appear (based on lock designs) to date from the two decades after 1820.[7] These don't appear to have entered general use and no surviving documentation on them has been found.[7]
During theAmerican Civil War, both the US and the Confederate militaries experimented upon and produced rocket launchers.[8] Confederate forces used Congreve rockets in limited uses due to its inaccuracies, while the US forces usedHale patent rocket launcher which fired seven to ten inch rockets with fin stabilizers at a range of 2,000 yards (6,000 ft).

Pre-war research programmes into military rocket technology by many of the major powers led to the introduction of a number ofrocket artillery systems with fixed or mobile launchers, often capable of firing a number of rockets in a singlesalvo. In the United Kingdom,solid fuel rockets were initially used in theanti-aircraft role; the 7-inchUnrotated Projectile was fired from single pedestal-mounted launchers on warships and a 3-inch version was used by shore basedZ Batteries, for which multiple "projectors" were developed. Later developments of these weapons included theLand Mattress multiple launchers for surface-to-surface bombardment and theRP-3 air-to-ground rockets that were launched from rails fitted tofighter bomber aircraft. In Germany, the15 cm Nebelwerfer 41 was an adaptation of a multiple barrelled smokemortar for artillery rockets. TheSoviet'sKatyusha was a self-propelled system, being mounted on trucks, tanks and even trains. TheUnited States Army deployed the tank mountedT34 Calliope system late in the war.[9]

The rocket launchers category includes shoulder-fired weapons, any weapon that fires a rocket-propelled projectile at a target yet is small enough to be carried by a single person and fired while held on one's shoulder. Depending on the country or region, people might use the terms "bazooka" or "RPG" as generalized terms to refer to such weapons, both of which are in fact specific types of rocket launchers. The Bazooka was an Americananti-tank weapon which was in service from 1942 to 1957, while the RPG (most commonly theRPG-7) is aSoviet anti-tank weapon. There are also shoulder-fired rocket launchers that compose an overall weapon system, such as theman-portable anti-tank systemFGM-148 Javelin, which has aguided anti-tank rocket.
A smaller variation is thegyrojet, asmall arms rocket launcher withammunition slightly larger than that of a.45-caliber pistol.
Recoilless rifles are sometimes confused with rocket launchers. A recoilless rifle launches its projectile using an explosive powder charge, not a rocket engine, though some such systems have sustainer rocket motors.
A rocket pod is a launcher that contains severalunguided rockets held in individual tubes, designed to be used byattack aircraft orattack helicopters forclose air support. In many cases, rocket pods arestreamlined to reduceaerodynamic drag. The first pods were developed immediately after World War II, as an improvement over the previous arrangement of firing rockets from rails, racks or tubes fixed under the wings of aircraft. Early examples of pod-launched rockets were the USFolding-Fin Aerial Rocket and the FrenchSNEB.[10]
Larger-scale devices which serve to launch rockets include themultiple rocket launcher, a type of unguidedrocket artillery system.
A rocket launcher may be used for multiple purposes depending on what warhead is on the rocket to be launched.
The ancestral role of early modern rocket launchers is todestroy tanks. The warheads for destroying armor includehigh-explosive anti-tank (HEAT) warheads, whichpierces holes on armour. Examples include thebazooka and theRPG-7 (if using a rocket designed to destroy tank armour, see also thearmoured fighting vehicle section of thevehicle armour article).
Rocket launchers may alsobe used to target personnel. For example, the RPG-7V1, avariant of the RPG-7, can be loaded with a rocket with aOG-7M, afragmentation warhead, or a rocket containing athermobaricTBG-7V, along with the armour pierceing wahead-containing rockets compatible with this variant.