large-calibre artillery
   HOME

TheInfoList



OR:

The formal definition of large-calibre artillery used by the
United Nations The United Nations (UN) is an intergovernmental organization whose stated purposes are to maintain international peace and international security, security, develop friendly relations among nations, achieve international cooperation, and be ...
Register of Conventional Arms (UNROCA) is "
gun A gun is a ranged weapon designed to use a shooting tube (gun barrel) to launch projectiles. The projectiles are typically solid, but can also be pressurized liquid (e.g. in water guns/cannons, spray guns for painting or pressure washing, p ...
s,
howitzer A howitzer () is a long- ranged weapon, falling between a cannon (also known as an artillery gun in the United States), which fires shells at flat trajectories, and a mortar, which fires at high angles of ascent and descent. Howitzers, like ot ...
s,
artillery piece Artillery is a class of heavy military ranged weapons that launch munitions far beyond the range and power of infantry firearms. Early artillery development focused on the ability to breach defensive walls and fortifications during sieges, ...
s, combining the characteristics of a
gun A gun is a ranged weapon designed to use a shooting tube (gun barrel) to launch projectiles. The projectiles are typically solid, but can also be pressurized liquid (e.g. in water guns/cannons, spray guns for painting or pressure washing, p ...
,
howitzer A howitzer () is a long- ranged weapon, falling between a cannon (also known as an artillery gun in the United States), which fires shells at flat trajectories, and a mortar, which fires at high angles of ascent and descent. Howitzers, like ot ...
, mortar, or multiple-launch rocket system, capable of engaging surface targets by delivering primarily
indirect fire Indirect fire is aiming and firing a projectile without relying on a direct line of sight between the gun and its target, as in the case of direct fire. Aiming is performed by calculating azimuth and inclination, and may include correcting aim ...
, with a
calibre In guns, particularly firearms, caliber (or calibre; sometimes abbreviated as "cal") is the specified nominal internal diameter of the gun barrel bore – regardless of how or where the bore is measured and whether the finished bore match ...
of 75 millimetres and above". This definition, shared by the Arms Trade Treaty and the
Treaty on Conventional Armed Forces in Europe The original Treaty on Conventional Armed Forces in Europe (CFE) was negotiated and concluded during the last years of the Cold War and established comprehensive limits on key categories of conventional military equipment in Europe (from the Atlan ...
, is derived from a definition in
United Nations General Assembly Resolution A United Nations General Assembly resolution is a decision or declaration voted on by all member states of the United Nations in the General Assembly. General Assembly resolutions usually require a simple majority (50 percent of all votes plus o ...
46/36L, which set a threshold of 100mm. Several grammatical changes were made to that latter in 1992 and the threshold was lowered in 2003 to yield the current definition, as endorsed by UN General Assembly Resolution 58/54. Historically, large-calibre weapons have included
bombard __NOTOC__ Bombard may refer to the act of carrying out a bombardment. It may also refer to: Individuals *Alain Bombard (1924–2005), French biologist, physician and politician; known for crossing the Atlantic on a small boat with no water or food ...
s and
siege gun Siege artillery (also siege guns or siege cannons) are heavy guns designed to bombard fortifications, cities, and other fixed targets. They are distinct from field artillery and are a class of siege weapon capable of firing heavy cannonballs o ...
s.


Late Middle Ages

In the context of
late medieval The Late Middle Ages or Late Medieval Period was the period of European history lasting from AD 1300 to 1500. The Late Middle Ages followed the High Middle Ages and preceded the onset of the early modern period (and in much of Europe, the Renai ...
siege warfare the term superguns applies to stone-firing
bombard __NOTOC__ Bombard may refer to the act of carrying out a bombardment. It may also refer to: Individuals *Alain Bombard (1924–2005), French biologist, physician and politician; known for crossing the Atlantic on a small boat with no water or food ...
s with a ball diameter of more than 50 cm. These superguns were either manufactured by forging together longitudinal iron bars, held in place by iron rings, or cast in bronze with techniques generally similar to bell-founding. Known examples include the
Pumhart von Steyr The Pumhart von Steyr is a medieval large-calibre cannon from Styria, Austria, and the largest known wrought-iron bombard by caliber. It weighs around 8 tons and has a length of more than 2.5 meters. It was produced in the early 15th century an ...
,
Dulle Griet The Dulle Griet ("Mad Meg", named after the Flemish folklore figure Dull Gret) is a medieval large-calibre gun founded in Gent (Ghent). History Three cannons were founded: one resides now in Edinburgh and is called "Mons Meg", and the last ...
and
Mons Meg Mons Meg is a medieval bombard in the collection of the Royal Armouries, on loan to Historic Scotland and located at Edinburgh Castle in Scotland. It has a barrel diameter of making it one of the largest cannons in the world by calibre. ...
(all iron) as well as the cast-bronze
Faule Mette The Faule Mette (German for ''Lazy Mette'', alluding to the gun's rare deployment, difficult mobility, and limited loading and fire rate) or Faule Metze was a medieval large-calibre cannon of the city of Brunswick, Germany. Cast by the gunfound ...
,
Faule Grete The Faule Grete ( German for ''Lazy Grete'', alluding to the lack of mobility and slow rate of fire of such super-sized cannon) was a medieval large-calibre cannon of the Teutonic Order. The bronze bombard was cast in 1409 in the cannon foundry ...
and
Dardanelles Gun The Basilic (cannon), Basillica or Great Turkish Bombard ( tr, Şahi topu or simply ''Şahi'') is a 15th-century Siege engine, siege cannon, specifically a large-calibre artillery, super-sized Bombard (weapon), bombard, which saw action in the ...
. At the beginning of the development of superguns was the desire to increase the effect of the projectiles. To this end, master gunners first simply used larger
powder A powder is a dry, bulk solid composed of many very fine particles that may flow freely when shaken or tilted. Powders are a special sub-class of granular materials, although the terms ''powder'' and ''granular'' are sometimes used to distin ...
loads. These, however, exerted larger pressure on the existing cannon and could make it burst, causing the death of the irreplaceable gunner with his crew (and even kings). In addition, it was observed that, due to their higher velocity, stone balls were shattered by the impact on the walls rather than smashing them. Thus, the mass of the cannon balls and, consequently, of the ordnance too continually increased, finally culminating in giant cannon like the Pumhart von Steyr which fired a 690 kg ball. Apart from the anticipated improvement in penetrating power, other factors such as prestige and a potential deterrent effect also played an important role. For all their manufacturing quality the superguns were only moderately successful. Their military effectiveness turned out to be out of all proportion to their overwhelming logistical demands and financial costs. For the cost of a single supergun, two or three large bombards with a reasonably smaller
caliber In guns, particularly firearms, caliber (or calibre; sometimes abbreviated as "cal") is the specified nominal internal diameter of the gun barrel Gauge (firearms) , bore – regardless of how or where the bore is measured and whether the f ...
(in
German German(s) may refer to: * Germany (of or related to) ** Germania (historical use) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizens of Germany, see also German nationality law **Ge ...
''Hauptbüchse'') could be produced whose firepower was enough to shatter any medieval wall, in particular when it was concentrated in a
battery Battery most often refers to: * Electric battery, a device that provides electrical power * Battery (crime), a crime involving unlawful physical contact Battery may also refer to: Energy source *Automotive battery, a device to provide power t ...
. Due to their less bulky dimensions and higher rate of fire, these artillery pieces could be more flexibly deployed and caused more destruction in any given length of time. Furthermore, the transition from stone to smaller, but much more devastating iron balls meant that super-sized bores became unnecessary. The caliber of a 50 pound ball, for example, could be reduced from 28 to 18 cm when using an iron projectile instead. Thus, as early as the second half of the 15th century, further development in siege technology concentrated on the ''Hauptbüchse'', and bombards largely disappeared from the leading artillery arsenal of the
dukes of Burgundy Duke of Burgundy (french: duc de Bourgogne) was a title used by the rulers of the Duchy of Burgundy, from its establishment in 843 to its annexation by France in 1477, and later by Holy Roman Emperors and Kings of Spain from the House of Habsburg ...
. At about the same time super-sized bombards were phased out in Western Europe, the technology was transmitted to the Ottoman army by one
Orban Orban, also known as Urban ( hu, Orbán; died 1453), was an iron founder and engineer from Brassó, Transylvania, in the Kingdom of Hungary (today Brașov, Romania), who cast large-calibre artillery for the Ottoman siege of Constantinople in 145 ...
, a Hungarian gunfounder, on the occasion of the
Siege of Constantinople The following is a list of sieges of Constantinople, a historic city located in an area which is today part of Istanbul, Turkey. The city was built on the land that links Europe to Asia through Bosporus and connects the Sea of Marmara and the ...
in 1453.Schmidtchen (1977b), p. 226 The extant Dardanelles Gun, cast by the Ottoman gunfounder Ali several years later, is assumed to have followed closely the outline of Orban's guns. A similar super-sized bombard was employed by the Ottoman navy aboard a
carrack A carrack (; ; ; ) is a three- or four- masted ocean-going sailing ship that was developed in the 14th to 15th centuries in Europe, most notably in Portugal. Evolved from the single-masted cog, the carrack was first used for European trade fr ...
of possibly Venetian design at the Battle of Zonchio in 1499. In India, a large forge-welded iron cannon was built during the reign of
Raghunatha Nayak Raghunatha Nayak was the most powerful king of the Thanjavur Nayak Dynasty. He was the third ruler of Thanjavur, southern India, from the Nayak dynasty. He ruled from 1600 to 1634 and is noted for the attainments of Thanjavur in literature, art, ...
(1600–1645), and was then one of the largest cannons in the world. Artillery was used by Indian armies predominantly for defending against besieging armies.


Modern weapons

With the new
metallurgical Metallurgy is a domain of materials science and engineering that studies the physical and chemical behavior of metallic elements, their inter-metallic compounds, and their mixtures, which are known as alloys. Metallurgy encompasses both the sc ...
methods and
precision engineering Precision engineering is a subdiscipline of electrical engineering, software engineering, electronics engineering, mechanical engineering, and optical engineering concerned with designing machines, fixtures, and other structures that have exce ...
of the
Industrial Revolution The Industrial Revolution was the transition to new manufacturing processes in Great Britain, continental Europe, and the United States, that occurred during the period from around 1760 to about 1820–1840. This transition included going f ...
, a revolution in armaments, including
artillery Artillery is a class of heavy military ranged weapons that launch munitions far beyond the range and power of infantry firearms. Early artillery development focused on the ability to breach defensive walls and fortifications during siege ...
took place. In the 1860s, the industrialist Sir William Armstrong, who had already built one of the first breech-loading rifled artillery pieces, constructed a 600-pounder 'monster gun' of then extraordinary size at the
Elswick Ordnance Company The Elswick Ordnance Company (sometimes referred to as Elswick Ordnance Works, but usually as "EOC") was a British armaments manufacturing company of the late 19th and early 20th century History Originally created in 1859 to separate William A ...
in
Newcastle Newcastle usually refers to: *Newcastle upon Tyne, a city and metropolitan borough in Tyne and Wear, England *Newcastle-under-Lyme, a town in Staffordshire, England *Newcastle, New South Wales, a metropolitan area in Australia, named after Newcastle ...
. The gun was a rifled muzzle-loader of 22 tons that fired shells of up to 600 pounds (270 kg) and could pierce 4.5 inches (11.4 cm) of iron armour. Armstrong identified them as "shunt" guns, but they were soon popularly known as "monster" guns. By the 1880s he had built guns of over 40 feet (12 m) in length that could fire 1,800 pound (810 kg) shells and punch through an incredible 30 inches (76 cm) of iron at a range of 8 miles. The gun was exhibited at the Royal Mining Engineering Jubilee Exhibition held at Newcastle in 1887 for
Queen Victoria Victoria (Alexandrina Victoria; 24 May 1819 – 22 January 1901) was Queen of the United Kingdom of Great Britain and Ireland from 20 June 1837 until Death and state funeral of Queen Victoria, her death in 1901. Her reign of 63 years and 21 ...
's golden jubilee. Prior to
World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...
, the German military was especially interested in the development of
superweapon A weapon of mass destruction (WMD) is a chemical, biological, radiological, nuclear, or any other weapon that can kill and bring significant harm to numerous individuals or cause great damage to artificial structures (e.g., buildings), natur ...
s due to the need for the
Schlieffen plan The Schlieffen Plan (german: Schlieffen-Plan, ) is a name given after the First World War to German war plans, due to the influence of Field Marshal Alfred von Schlieffen and his thinking on an invasion of France and Belgium, which began on ...
to march past a line of Belgian fortifications constructed specifically to stop such an invasion route. During the opening phases of the war, the Germans employed a 420 mm
Krupp The Krupp family (see pronunciation), a prominent 400-year-old German dynasty from Essen, is notable for its production of steel, artillery, ammunition and other armaments. The family business, known as Friedrich Krupp AG (Friedrich Krup ...
howitzer A howitzer () is a long- ranged weapon, falling between a cannon (also known as an artillery gun in the United States), which fires shells at flat trajectories, and a mortar, which fires at high angles of ascent and descent. Howitzers, like ot ...
(the Big Bertha) and two 305 mm Skoda Mörser M. 11 mortars to reduce the famous fortresses of
Liège Liège ( , , ; wa, Lîdje ; nl, Luik ; german: Lüttich ) is a major city and municipality of Wallonia and the capital of the Belgian province of Liège. The city is situated in the valley of the Meuse, in the east of Belgium, not far from b ...
and
Namur Namur (; ; nl, Namen ; wa, Nameur) is a city and municipality in Wallonia, Belgium. It is both the capital of the province of Namur and of Wallonia, hosting the Parliament of Wallonia, the Government of Wallonia and its administration. Namu ...
. Their low overland mobility made them arrive later than the infantry at Liège, so several infantry assaults were made with heavy loss of life and generally little success. The guns arrived a few days later and reduced the forts at Liège one-by-one over a short period of a few days. Larger artillery after this opening period was generally limited to
railway gun A railway gun, also called a railroad gun, is a large artillery piece, often surplus naval artillery, mounted on, transported by, and fired from a specially designed railway wagon. Many countries have built railway guns, but the best-known are ...
s, which had much greater mobility, or naval
monitors Monitor or monitor may refer to: Places * Monitor, Alberta * Monitor, Indiana, town in the United States * Monitor, Kentucky * Monitor, Oregon, unincorporated community in the United States * Monitor, Washington * Monitor, Logan County, West Vir ...
(two of the British Lord Clive class monitors were fitted with an 18-inch (457 mm) gun, and HMS General Wolfe fired at a railway bridge in Belgium). All of the major powers involved employed such weapons in limited numbers, typically between 280 and 305 mm (11 to 12 inches) although some larger weapons were also used. The longest-ranged and longest-barreled of the heavy guns deployed in World War I was the Paris Gun, which was used to bombard
Paris Paris () is the capital and most populous city of France, with an estimated population of 2,165,423 residents in 2019 in an area of more than 105 km² (41 sq mi), making it the 30th most densely populated city in the world in 2020. S ...
from a distance of over . The gun had a bore diameter of and a barrel length of . It was fired from concealed fixed positions in the forest of Coucy. The British attempted to develop weapons to counter the Paris Gun, but none was ready for testing until after the
Armistice An armistice is a formal agreement of warring parties to stop fighting. It is not necessarily the end of a war, as it may constitute only a cessation of hostilities while an attempt is made to negotiate a lasting peace. It is derived from the La ...
. A 16-inch gun under development by
Vickers Vickers was a British engineering company that existed from 1828 until 1999. It was formed in Sheffield as a steel foundry by Edward Vickers and his father-in-law, and soon became famous for casting church bells. The company went public in 18 ...
for a class of never-built Russian battleships was converted and lined down to , with the designation "8-inch sub-calibre Mark I". The barrel was 120
calibre In guns, particularly firearms, caliber (or calibre; sometimes abbreviated as "cal") is the specified nominal internal diameter of the gun barrel bore – regardless of how or where the bore is measured and whether the finished bore match ...
s long. Testing commenced in February 1919, but after only six rounds were fired a crack was discovered, and the gun was scrapped in 1928. A weapon of similar concept, the "8-inch sub-calibre Mark II", was converted from a 12-inch gun (either Mark XI, XI*, or XII), producing a /75 calibre weapon. However, with the war ending before the gun was ready, this weapon was soon scrapped. Development continued during the inter-war era, although at a more limited pace as
aircraft An aircraft is a vehicle that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines ...
were expected to take over in the long-range bombardment role. Nevertheless, the Germans built a handful of powerful
Krupp K5 The Krupp K5 was a heavy railway gun used by Germany throughout World War II. Description Krupp's K5 series were consistent in mounting a long gun barrel in a fixed mounting with only vertical elevation of the weapon. This gondola was then mou ...
s and the largest artillery pieces (by caliber) ever used in combat: the 800 mm (31.5 in.)
Schwerer Gustav Schwerer Gustav (English: ''Heavy Gustav'') was a German railway gun. It was developed in the late 1930s by Krupp in Rügenwalde as siege artillery for the explicit purpose of destroying the main forts of the French Maginot Line, the strongest ...
and Dora. The latter had been designed specifically to defeat the
Maginot Line The Maginot Line (french: Ligne Maginot, ), named after the French Minister of War André Maginot, is a line of concrete fortifications, obstacles and weapon installations built by France in the 1930s to deter invasion by Germany and force the ...
, firing a 7-ton shell to a range of . Although their original role proved unnecessary, Gustav was used successfully to destroy Soviet heavy fortifications, most notably those at
Sevastopol Sevastopol (; uk, Севасто́поль, Sevastópolʹ, ; gkm, Σεβαστούπολις, Sevastoúpolis, ; crh, Акъя́р, Aqyár, ), sometimes written Sebastopol, is the largest city in Crimea, and a major port on the Black Sea ...
. Dora was readied for combat at
Stalingrad Volgograd ( rus, Волгогра́д, a=ru-Volgograd.ogg, p=vəɫɡɐˈɡrat), geographical renaming, formerly Tsaritsyn (russian: Цари́цын, Tsarítsyn, label=none; ) (1589–1925), and Stalingrad (russian: Сталингра́д, Stal ...
, but was withdrawn before it could be used. Development might have continued but for the ever-increasing Allied air power, which limited
Hitler Adolf Hitler (; 20 April 188930 April 1945) was an Austrian-born German politician who was dictator of Germany from 1933 until his death in 1945. He rose to power as the leader of the Nazi Party, becoming the chancellor in 1933 and then ...
's options in terms of re-opening bombing attacks on
London London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a majo ...
. This led to the development of the V-3 "London Gun" or "''Hochdruckpumpe''", fired from Mimoyecques in the
Pas de Calais The Strait of Dover or Dover Strait (french: Pas de Calais - ''Strait of Calais''), is the strait at the narrowest part of the English Channel, marking the boundary between the Channel and the North Sea, separating Great Britain from continent ...
, about away. Two attempts to build underground bunkers for the huge weapons were thwarted by massive
Royal Air Force The Royal Air Force (RAF) is the United Kingdom's air and space force. It was formed towards the end of the First World War on 1 April 1918, becoming the first independent air force in the world, by regrouping the Royal Flying Corps (RFC) and ...
bombing raids, which made further attempts futile. Two smaller prototype versions of the gun were used during the
Battle of the Bulge The Battle of the Bulge, also known as the Ardennes Offensive, was the last major German offensive (military), offensive military campaign, campaign on the Western Front (World War II), Western Front during World War II. The battle lasted fr ...
. During World War II, the British developed an experimental 13.5/8 inch hypervelocity gun named Bruce, which was deployed near St Margaret's in
Kent Kent is a county in South East England and one of the home counties. It borders Greater London to the north-west, Surrey to the west and East Sussex to the south-west, and Essex to the north across the estuary of the River Thames; it faces ...
among their cross-Channel guns.Sussex History Forum post with material from RMSR War Diary
/ref> It was intended only for stratospheric experiments, primarily with smoke shells. These experiments were important in the development of the
Grand Slam bomb The Bomb, Medium Capacity, (Grand Slam) was a earthquake bomb used by RAF Bomber Command against German targets towards the end of the Second World War. The bomb was originally called Tallboy Large until the term Tallboy got into the press an ...
. It was used from March 1943 through February 1945.


The "Supergun Affair"

Canadian engineer
Gerald Bull Gerald Vincent Bull (March 9, 1928 – March 22, 1990) was a Canadian engineer who developed long-range artillery. He moved from project to project in his quest to economically launch a satellite using a huge artillery piece, to which end he des ...
became interested in the possibility of using 'superguns' in place of rockets to insert payloads into orbit. He lobbied for the start of
Project HARP Project HARP, short for High Altitude Research Project, was a joint venture of the United States Department of Defense and Canada's Department of National Defence created with the goal of studying ballistics of re-entry vehicles and collecting ...
to investigate this concept in the 1960s, using paired ex-US Navy 16"/50 caliber Mark 7 gun barrels welded end-to-end. Three of these 16"/50 (406 mm) guns were emplaced, one in
Quebec Quebec ( ; )According to the Canadian government, ''Québec'' (with the acute accent) is the official name in Canadian French and ''Quebec'' (without the accent) is the province's official name in Canadian English is one of the thirtee ...
, Canada, another in
Barbados Barbados is an island country in the Lesser Antilles of the West Indies, in the Caribbean region of the Americas, and the most easterly of the Caribbean Islands. It occupies an area of and has a population of about 287,000 (2019 estimate). ...
, and the third near
Yuma, Arizona Yuma ( coc, Yuum) is a city in and the county seat of Yuma County, Arizona, United States. The city's population was 93,064 at the 2010 census, up from the 2000 census population of 77,515. Yuma is the principal city of the Yuma, Arizona, M ...
. HARP was later cancelled, and Bull turned to military designs, eventually developing the
GC-45 howitzer The GC-45 (''Gun, Canada, 45-calibre'') is a 155 mm howitzer designed by Gerald Bull's Space Research Corporation (SRC) in the 1970s. Versions were produced by a number of companies during the 1980s, notably in Austria and South Africa. The ...
. Some years later, Bull interested
Saddam Hussein Saddam Hussein ( ; ar, صدام حسين, Ṣaddām Ḥusayn; 28 April 1937 – 30 December 2006) was an Iraqi politician who served as the fifth president of Iraq from 16 July 1979 until 9 April 2003. A leading member of the revolution ...
in funding
Project Babylon Project Babylon was a space gun project commissioned by then Iraqi president Saddam Hussein. It involved building a series of "superguns". The design was based on research from the 1960s Project HARP led by the Canadian artillery expert Gerald ...
. The objective of this project is not certain, but one possibility is that it was intended to develop a gun capable of firing an object into
orbit In celestial mechanics, an orbit is the curved trajectory of an object such as the trajectory of a planet around a star, or of a natural satellite around a planet, or of an artificial satellite around an object or position in space such as a p ...
, whence it could then drop onto any place on the Earth. Gerald Bull was assassinated in March 1990, terminating development, and the parts were confiscated by British customs after the
Gulf War The Gulf War was a 1990–1991 armed campaign waged by a 35-country military coalition in response to the Iraqi invasion of Kuwait. Spearheaded by the United States, the coalition's efforts against Iraq were carried out in two key phases: ...
. It has been suggested that the US Navy had developed a supergun (actually a prototype
railgun A railgun or rail gun is a linear motor device, typically designed as a weapon, that uses electromagnetic force to launch high velocity projectiles. The projectile normally does not contain explosives, instead relying on the projectile's high ...
, known as the Electro-Magnetic Laboratory Rail Gun), capable of shooting shells at 5,600 mph (9,012 km/h) or Mach 7 (seven times the speed of sound).


See also

*
Railgun A railgun or rail gun is a linear motor device, typically designed as a weapon, that uses electromagnetic force to launch high velocity projectiles. The projectile normally does not contain explosives, instead relying on the projectile's high ...
*
List of artillery Artillery has been one of primary weapons of war since before the Napoleonic Era. Several countries have developed and built artillery systems, while artillery itself has been continually improved and redesigned to meet the evolving needs of the b ...
*
List of the largest cannon by caliber The list of cannon by caliber contains all types of cannon through the ages listed in decreasing caliber size. For the purpose of this list, the development of large-calibre artillery can be divided into three periods, based on the kind of projec ...
*
Super High Altitude Research Project The Super High Altitude Research Project (Super HARP, SHARP) was a U.S. government project conducting research into the firing of high-velocity projectiles high into the atmosphere using a two-stage light-gas gun, with the ultimate goal of propellin ...


References


Reference bibliography

* * * * * * * * * * {{refend