Editing Gerald Bull (section)

==Career==
{{more citations needed section|date=March 2016}}

===Canada===
The Canadian Armament and Research Development Establishment (CARDE) was formed as a joint Canadian-British operation to study artillery and ballistics, in an effort to harness the intellectual resources of Canada, as well as to place developing British technology outside of German reach during World War II. Formed up on a military training area and artillery range outside [[Valcartier]], northwest of [[Quebec City]], CARDE was one of a number of research divisions of the DRB that were well funded in the immediate post-war era. CARDE was researching [[supersonic]] flight and a variety of rocket and missile projects when Bull was asked to join. Bull asked to build a wind tunnel for this research, but his suggestions were dismissed as too expensive.{{citation needed|date=December 2014}}

Gunners at CARDE suggested that firing models out of existing gun barrels would permit gathering data at much lower cost, and guided Bull in this direction. As a proof of concept, they tried an [[Ordnance QF 17-pounder]] barrel bored to {{convert|3.9|in|mm}}. The aerodynamicists' demands to accommodate larger models resulted in boring out a [[BL 5.5 inch Medium Gun]] barrel to produce a {{convert|5.9|in|mm}} smooth-bore. Borrowing an idea developed in England in 1916, cards were placed on holders along the range and scaled models of the missile fired through them. The models were carried in a segmented aluminum [[sabot (firearms)|sabot]], which peeled away as the round left the muzzle.

As originally built the range was {{convert|1000|yd}} long, with "jump cards" located at {{convert|100|yd}} intervals. A metallic coating on the cards permitted timing of flight progress to measure velocity. One station was equipped for [[Schlieren photography]] to record the shock waves and wake around the projectile. In some ways this technique was superior to wind tunnel study, as it allowed for the direct measurement of real-world influences on the trajectory, as a test of theoretical calculations. On the downside, reducing the collected data to a mathematical trajectory for checking against the theoretical calculations is difficult.{{citation needed|date=December 2014}}

Bull was at CARDE briefly before returning to the university to defend his thesis in March 1951, at 23 years old becoming the youngest PhD graduate in the institute's history—a record that remains to this day. He returned to CARDE, now on the DRB's payroll, and continued working on the instrumented guns. On one of these trips, in 1953, he and a friend stopped in [[Charny, Quebec|Charny]] after a fishing trip to drop off some of their catch at a local doctor's house. Bull met Noemi "Mimi" Gilbert, the doctor's daughter, and the two soon started dating. Given Bull's work schedule they were rarely able to see each other, but they became engaged in February 1954, and married on July 15. Gilbert gave the couple a small house as a wedding gift. Mimi gave birth to their first son, Phillippe, on July 3, 1955, and a second, Michel, in November 1956.{{citation needed|date=December 2014}}

In 1954 Bull decided that a wind tunnel was too important to ignore, even if he could not arrange for funding through the DRB. Instead, he gained the ear of professors at [[Laval University]] in Quebec City, and Bull and a number of graduate students started work on a tunnel similar to the one he had earlier built at the UofT. It opened in the summer of 1955 and was capable of speeds up to Mach 4, but cost only $6,000, the result of using scrap for most of its parts.{{citation needed|date=March 2016}}

Bull's work was brought to the public's attention in a May 20, 1955 ''[[Toronto Telegram]]'' headline article, ''Unveil Canadian Gun that Fires 4,550 M.P.H. Missiles''. Around this time Bull further improved the data-collection capabilities of the system by developing a telemetry system that could fit in the models. DRB staff thought the idea was unworkable and worked against having it funded, but Bull shuffled his own department's funding and went ahead and developed it anyway. All the parts of Bull's future efforts, smooth-bore high-velocity guns, sabots for increasing performance, and hardened electronics, were now complete.{{citation needed|date=December 2014}}

Work on the [[Velvet Glove]] ended in 1956, and the DRB turned its attention to [[anti-ballistic missile]]s (ABMs). Bull's gun system was not fast enough to be useful in this role, so it was adapted to use a "sabot" to improve its performance. Bull then moved on to hypersonics research and the study of [[infrared]] and [[radar cross section]]s for detection. As the UK's research efforts wound down in the post-war political environment, CARDE's joint UK-Canadian funding was dramatically cut back, with the project eventually being handed over to the Canadians entirely and followed by further cuts. Bull was vocal about this turn of events, calling the Liberal government of the day "second-rate lawyers and jumped-up real-estate salesmen".{{sfnp|Grant|1991|p=42}}

During this period CARDE was visited by a US team, including Lieutenant General [[Arthur Trudeau]], who was impressed with Bull's work. Trudeau was director of US Army Research and Development, and he quickly set up a similar effort at the [[Aberdeen Proving Ground]] under the direction of Dr. Charles Murphy.{{Who|date=March 2016}} They built an analog of Bull's gun using a {{convert|5|in|mm|adj=on}} gun and started test firing it over the Atlantic in 1961. The team used a fire-control radar from a [[Nike Hercules]] missile battery to track the shells, which released a cloud of [[Chaff (countermeasure)|chaff]] at altitudes up to {{convert|130000|ft|m}}.{{citation needed|date=December 2014}}

Around the same time, Bull and Murphy started discussing the idea of firing scale aircraft models from their guns. Both started working on the idea, but Bull beat Murphy when he successfully fired a model of the [[Gloster Javelin]] from his gun and managed to take shadowgraph photos of it showing supersonic shock cones. Bull then used the same method to work on the [[Avro Arrow]], discovering an instability that led to the use of a [[stability augmentation system]]. Work on the Avro Arrow was soon cancelled, which angered Bull.{{sfnp|Grant|1991|p=51}}

With attention turning to space after the launch of [[Sputnik]] in 1957, Bull leaked a story that Canada would soon match this feat by placing a high-velocity gun in the nose of a US Army [[Redstone missile]]. The story was a complete fabrication, but caused a major stir when it hit the papers on April 22, 1958.{{sfnp|Grant|1991|pp=52–53}} After the story broke Prime Minister [[John Diefenbaker]] was besieged in the House of Commons [[press scrum]], later dismissing it stating that "There is no foundation whatsoever to the story, not a scintilla of truth to it".{{sfnp|Grant|1991|p=53}}

A major flap broke out as a result, leading to the dressing down of several of Bull's superiors. When the press was invited to visit CARDE, the [[Canadian Broadcasting Company]] broadcast a piece covering much of the work at CARDE on May 11, including lengthy sections on Bull's gun and their work on [[infrared]] detection and [[anti-ballistic missile]] systems.<ref>[http://archives.cbc.ca/war_conflict/national_security/clips/3353/ A supersonic scientist], CBC.ca, May 11, 1958.</ref>

On April 1, 1961, Bull got into an argument with his direct superior over paperwork. Bull wrote out his resignation. A report prepared after his departure stated "... his tempestuous nature and strong dislike for administration and red tape constantly led him into trouble with senior management."{{sfnp|Grant|1991|p=55}}

===High Altitude Research Project===
{{Main|Project HARP}}
{{more citations needed section|date=March 2016}}
Bull had long prepared for this event, and soon re-appeared as a professor at [[McGill University]], which was in the process of building up a large engineering department under the direction of Donald Mordell. Mordell had long maintained links with CARDE and became one of Bull's ardent supporters, in spite of what other professors saw as "second-rate attempts at manipulation" and that "[Mordell] always supported Bull's work ... I think sometimes he got pretty tired of supporting Bull."{{sfnp|Grant|1991|p=59}} Bull, for his part, appeared to enjoy the new position, and later described it as "a marriage made in heaven". Bull remained in contact with his counterparts in the US and the University of Toronto, and set about equipping the university with the instrumentation it would need to be a leader in the field of aerodynamics.

Several years earlier, while still working at CARDE, Gerald and Mimi had purchased a {{convert|2000|acre|km2|adj=on}} plot of land on the Québec–Vermont border. Bull donated the land to be used by McGill and turned into a new ballistics lab, a private analog of the CARDE site. Renamed to become "Highwater Station" due to the local village of [[Highwater, Quebec]], the site was quickly developed under the direction of former [[British Army]] colonel Robert Stacy, who bulldozed large sections, built various test facilities and ran power to the site. There they began working with {{cvt|5|in|mm|0}} and {{cvt|7|in|mm|0}} artillery pieces.

In late 1961 Bull visited Murphy and Trudeau at Aberdeen and was able to interest them in the idea of using guns to loft missile components for re-entry research, a task that was otherwise very expensive and time-consuming aboard rockets. They arranged funding for the work under [[Project HARP]] (for ''High Altitude Research Project'', not to be confused with [[High Frequency Active Auroral Research Program|HAARP]]). The US Navy supplied a surplus {{convert|16|in|mm|adj=on|0}} battleship gun, and a contract from the [[Office of Naval Research]] paid for the gun to be re-bored into a {{convert|16.4|in|mm|adj=on|0}} smooth bore. The entire contract, excluding shipping, was only $2,000.{{sfnp|Grant|1991|p=61}}

[[File:Abandoned-HARP-Gun.jpg|thumb|right| The remains of the abandoned Gun from Project HARP in Barbados.]]
The performance of the gun was so great that the Highwater site was too small to support it. McGill had long been running a meteorological station on [[Barbados]] and had close connections with the new [[Democratic Labour Party (Barbados)|Democratic Labour Party]] (DLP), and suggested that it would make an ideal location for the gun to be set up. Bull met with then Premier [[Errol Barrow]] who became Barbados' first Prime Minister after Barbados received its Independence from the UK in 1966. Barrow, an enthusiastic supporter of HARP, arranged for a firing site at Paragon, on the southeast coast of the island near the [[Grantley Adams International Airport|Seawell Airport]]. The guns arrived in early 1962 but could not be put ashore at the site, and had to be offloaded {{convert|7|mi|km}} up the coast at Foul Bay, and then transported overland via a purpose-built railway that employed hundreds of locals. As the project continued, this figure grew to over 300 permanently employed with the project, and it became a major reason for Barrow's continued support.{{sfnp|Grant|1991|p=62}} Bull encouraged the locals to use the project as a stepping-stone to a science or engineering degree of their own, and his efforts were widely lauded in the press.

In January 1962 the first test shot was carried out, firing an empty sabot. The test was completely successful, so a further two similar firings were abandoned and the second firing was made with a dart-like finned projectile named ''[[Project HARP#Martlet projectiles|Martlet]]'' (after the [[Martlet|mythical bird]] without feet on the McGill University crest). These tests demonstrated several problems, including poor shot-to-shot performance of the decades-old gunpowder, and the fact that the projectile left the barrel so quickly that the powder did not have time to burn completely. New charges using modern powder were soon supplied, and by November 1962 the 150-kilogram Martlets were being fired at over {{convert|10000|ft/s|m/s mph|0|abbr=on}} and reaching altitudes of {{convert|215000|ft|m|abbr=on}}.

The Martlets evolved through this period, growing in size and sophistication. As Bull later put it:

{{blockquote|Martlett 2A was the first high-altitude projectile. It weighed 225 pounds. The forebody carried electronics, the aftbody carried chemical payloads. It was five inches (127 mm) in diameter, and had a very heavy pusher plate. The actual all-up weight was around 400 to 450 pounds. Then what happened was the Martlet 2C. [It] was the big workhorse, still a five inch (127 mm). Then, towards the end, we came up with the 350 pound vehicle, the same thing, only seven inches in diameter.

The idea was to find out what happens in the atmosphere from sunset to sunrise. Remember, nobody gave us grants. We had to produce tropical atmospheric meteorological [data] for the army research office, that's how we got our money. We were trying to measure everything to the top of the atmosphere, which we labeled as a nominal two hundred kilometers.

The cost of a launch was about $5,000. We did up to eight a night. We used to do three nights in a row to try to get the data.|Gerald Bull{{sfnp|Grant|1991|p=65}}}}

The Martlet's electronics triggered the release of the chemical markers at a set altitude. This left a sort of "smoke trail" through the atmosphere that could be used to measure winds aloft by visual means. The chemical was typically [[triethylaluminium]], which burns on contact with air. Loading the shells was a dangerous job that required special handling. The Martlets were also used to release [[Chaff (countermeasure)|chaff]] instead of chemicals, allowing tracking via radar. Some shots used additional electronics to measure the magnetic field. Similar firings in support of the upper atmosphere research were made using 5" and 7" guns at Highwater, Alaska, and [[Wallops Island]], Virginia.<ref name=astro>Richard K. Graf.[http://www.astronautix.com/articles/abroject.htm A Brief History of the HARP Project] {{webarchive|url=https://web.archive.org/web/20130817180212/http://astronautix.com/articles/abroject.htm |date=2013-08-17 }}, astronautix.com; accessed March 10, 2016.</ref>

By the time the program ran down, about 1,000 firings had taken place, and the data collected during HARP represents half of all the upper-atmospheric data to this day.{{sfnp|Grant|1991|p=66}}

The Martlet-2 was only a stepping-stone on the way to Bull's real interest, a gun-launched rocket that could reach outer space. The gun had been thoroughly tested and was well past intercontinental ranges, but needed modifying. In early 1963 HARP started experimenting with the ''Martlet-3'', a 7-inch-diameter (177.8&nbsp;mm) "full bore" projectile designed to test the basic problems of launching a solid-fuel artillery shell from guns. Solid shell fuel has the consistency of soft rubber and is cut into a pattern that is open in the middle, so on firing the "grain" would tend to collapse into the cavity. This problem was solved by filling the cavity with [[zinc bromide]], which prevented the collapse and was drained after firing to allow the rocket to light. Test firings began at the US [[Ballistic Research Laboratory]] (now part of the [[United States Army Research Laboratory|U.S. Army Research Laboratory]]) in Aberdeen using a bored-out 175&nbsp;mm gun from the [[M107 Self-Propelled Gun|M107]]. This program proved the basic concept and shots of the Martlet-3 reached altitudes of {{convert|155|mi|km}}.

The ultimate goal of the program was the ''Martlet-4'', a three-stage 16.4" rocket that would be fired from a lengthened gun at [[Barbados]] and would reach orbit. In 1964 Donald Mordell was able to convince the Canadian government of the value of the HARP project as a low-cost method for Canada to enter the space-launch business, and arranged a joint Canadian-US funding program of $3 million a year for three years, with the Canadians supplying $2.5 million of that. Another 16.4" gun, mounted horizontally, was being tested at the Highwater range, and was extended by cutting the breech off the end of one gun and welding it to the end of another to produce a new gun over 110 feet long. The extension allowed the powder to be contained for a longer period of time, slowing down the acceleration and loads on the airframe, while also offering higher overall performance. Once the system had been tested at Highwater, a second barrel was shipped to Foul Bay, attached and strengthened with external bracing to allow it to be raised from the horizontal. This gun was extensively tested in 1965 and 1966.{{sfnp|Grant|1991|p=75}}

<!--  Irrelevant statement – although true, it is out of context here!  
In 1964, at age 36, Bull was named the Director of McGill University's Space Research Institute.{{citation needed|date=March 2016}}
-->
The orbital project faced a constant race with its own budget. Originally guaranteed three years of funding, the money was handled by the DRB, who was less than impressed with its former "star" going on to greater things while their own funding was being dramatically cut. Although the money was allocated for 1964, the DRB managed to delay delivery for ten months, forcing McGill to cover salaries in the interim. These problems did not go unnoticed in the US Army, and in order to ensure that firings would not be interrupted by problems on the Canadian side, a third double-length gun was built at the [[Yuma Proving Ground]]s to continue the high-altitude measurements. On November 18, 1966, this gun launched a Martlet-2 to 180&nbsp;km, a world record that still stands today.<ref name=astro/>

By 1967 it was becoming clear that the Martlet-4 would not be ready by the time the funding ran out in 1968. An effort started to build a simplified version, the GLO-1A (Gun-launched Orbiter, Version 1A), based on the Martlet-2G.<ref>{{Cite web|url=http://astronautix.com/lvs/maret2g1.htm|archive-url=https://web.archive.org/web/20080719234030/http://astronautix.com/lvs/maret2g1.htm|url-status=dead|title=Martlet 2G-1|archive-date=July 19, 2008|website=astronautix.com}}</ref> Continued budget pressures, changing public attitudes towards military affairs, negative reviews from the press and other researchers in Canada and a change of government all conspired to ensure that Canadian funding was not renewed in 1967. Bull had been working on a last-ditch effort to launch a Canadian flag into orbit in time for the [[Canadian Centennial]], but nothing came of this plan.{{sfnp|Grant|1991|p=79}}

===Space Research Corporation===
{{Main|Space Research Corporation}}
{{more citations needed section|date=March 2016}}

Bull returned to his Highwater range, and transferred HARP's assets to a new company. He invoked a clause in the original contract with McGill that required them to return the range to its original natural condition. Faced with hundreds of thousands of dollars in construction costs to wind down a project that could not garner funding, McGill was left with little choice but to trade Bull for title to the Highwater equipment.<ref name="astro"/> Setting up a new company, [[Space Research Corporation]] (SRC), Bull became an international artillery consultant. Incorporated in both Quebec and [[Vermont]], a number of contracts from both the Canadian and US military research arms helped the company get started.{{citation needed|date=March 2016}}. In the late 1960s, Bull established a space program at [[Norwich University]], in Northfield, Vermont.

At SRC Bull continued the development of his high-velocity artillery, adapting the HARP smoothbore into a new "reverse rifled" design where the lands of a conventional rifling were replaced by grooves cut into the barrel to make a slightly larger gun also capable of firing existing ammunition. Normally artillery shells are sealed into the rifling by a [[driving band]] of soft metal like copper, which demands that the shell be shaped so that it balances at its widest point, where the band is located. This is not ideal for ballistics,{{citation needed|date=March 2016}} especially supersonically where a higher [[fineness ratio]] is desirable. Bull solved this problem by using an additional set of nub "fins" near the front of the shell to keep it centered in the barrel, allowing the driving band to be greatly reduced in size, and located wherever was convenient. Re-shaping the shell for better supersonic performance provided dramatically improved range and accuracy, up to double in both cases, when compared to a similar gun using older-style ammunition. He called the new shell design "Extended Range, Full Bore" (ERFB).{{sfn|Anon.|1979|p=53}}

[[file:GHN-45rear.jpg|300px|thumb|right|The GC-45 howitzer as designed and manufactured by Space Research Corporation]]
Starting in 1975, Bull designed a new gun based on the common US 155/39 [[M109 howitzer]], extending it slightly to 45 calibre through modifications that could be applied to existing weapons, calling the resulting weapon the [[GC-45 howitzer]]. Bull also purchased the [[base bleed]] technology being developed in Sweden, which allowed for further improvements in range. The gun offered ranges far in excess of even the longest-ranged heavy artillery in a gun only slightly larger than common medium-weight guns.{{sfn|Anon.|1979|p=52}}

SRC's first major sales success was the sale of 50,000 ERFB shells to Israel in 1973 for use in American-supplied artillery pieces. The Israelis had successfully used a number of 175&nbsp;mm M107 guns in the counter-battery role against its Soviet counterpart, the [[130 mm towed field gun M1954 (M-46)]], but the introduction of long range rockets fired from [[Lebanon]] outranged them. The ERFB shells extended the range of the already formidable M107 to as much as {{convert|50|km}}, allowing the guns to counter-battery even the longest range rockets. {{citation needed|date=March 2016}}

Bull was rewarded for success of this program by a Congressional bill, sponsored by Senator [[Barry Goldwater]] (R-AZ) making him retroactively eligible for a decade of American citizenship and high-level American nuclear security clearance. He was granted citizenship by an Act of Congress.<ref>{{Cite journal|last=Tina|first=Starr|date=October 2009|title=Life and Work at Space Research|journal=Vermont's Northland Journal|volume=8|issue=7|page=7}}</ref>

===Sanctions contravention===
In 1977 and 1978, Bull orchestrated the illegal sale of 30,000 155&nbsp;mm artillery shells, gun barrels and plans for the [[GC-45 howitzer]] as well as radar equipment to [[Armscor (South Africa)|Armscor]], the South African state arms corporation; with two shipments made through Antigua in 1978 and another through Spain in 1979.{{sfn|Anon.|1979|p=52}} The [[South African Defence Force]]'s arsenal of vintage howitzers, antiquated by the arms embargo, had been outperformed by [[BM-21 Grad]]s during ''[[Operation Savannah (Angola)|Operation Savannah]]'' in 1975. In order to counter the modern Soviet artillery deployed in neighbouring [[Angola]], South African officials began seeking longer-ranged weapons systems and were referred to SRC. Armscor trialled the GC-45 with a new mounting to allow for increased powder loads and installed an [[auxiliary power unit]] for improving mobility in the field. The resulting [[G5 howitzer]] was vital to South African campaigns against [[Cuban intervention in Angola|Cuban expeditionary forces in Angola]], allowing them to target infrastructure and personnel with phenomenal accuracy.<ref name="Scholtz">{{cite book|last=Scholtz|first=Leopold|title=The SADF in the Border War 1966–1989|year=2013|publisher=Tafelberg|location=Cape Town|isbn=978-0-624-05410-8}}</ref> In addition, the urgent shipments were also meant to address the acute shortage of artillery shells due to their incursion into Angola.{{sfn|Anon.|1979|p=52}}

Once these shipments had been uncovered, Bull was arrested for illegal arms dealing in contravention of [[United Nations Security Council Resolution 418|UN Security Council Resolution 418]] for arms export to South Africa. Expecting a token punishment, Bull found himself spending six months in the [[Federal Correctional Complex, Allenwood|Federal Correctional Complex, Allenwood, Pennsylvania]] in 1980.<ref>{{Cite journal|last=Tena|first=Starr|date=October 2009|title=Life and Work at Space Research|journal=Vermont's Northland Journal|volume=8|issue=7|page=7}}</ref>{{#tag:ref|Bull and company president Rogers Gregory were sentenced to one year imprisonment of which six months was suspended. Space Research Corp US was also fined US$45,000.  Charges related to the export of 30,000 155mm artillery shells, two gun barrels and a radar tracking system – all of which were in contravention of the UN Arms Embargo on South Africa.  Fines were also raised for charges associated with false information being used on shipping and end-user documents. The charges and sentencing were based on guilty pleas by Bull, Gregory and SRC who threatened to implicate the CIA in their activities if the charges went before a grand jury leading to a public trial.<ref>[https://www.cia.gov/readingroom/docs/CIA-RDP90-00806R000200970081-4.pdf CIA FOIA release: June 17, 1980]</ref>| group="Note"}} After his release, he was again charged (this time in Canadian courts) for transferring technology on 155mm extended range shell development to China without the necessary export permits<ref>{{cite news| work=The Boston Globe | title=Scientist arms-smuggler faces US scrutiny again| url=https://www.cia.gov/readingroom/docs/CIA-RDP90-00552R000100260067-1.pdf |archive-url=https://web.archive.org/web/20210716165805/https://www.cia.gov/readingroom/docs/CIA-RDP90-00552R000100260067-1.pdf |archive-date=2021-07-16 |url-status=live| date=24 June 1984 |author=Kranish, Michael}}</ref> and fined $55,000 for international arms dealing.<ref name="BBC Future"/>

===Support to Iraq===
{{Main|Project Babylon}}
[[File:Iraqi Supergun Section 1.jpg|300px|thumb|right|A section of the Iraqi supergun ''Big Babylon'']]
Bull left Canada and moved to [[Brussels]], where a subsidiary of SRC called [[Poudreries Réunies de Belgique|European Poudreries Réunies de Belgique]] was based. Bull continued working with the ERFB ammunition design, developing a range of munitions that could be fired from existing weapons. A number of companies designed upgrades to work with older weapons, like the [[M114 155 mm howitzer]], combining a new barrel from the M109 with Bull's ERFB ammunition to produce an improved weapon for relatively low cost.

Bull also continued working with the GC-45 design, and soon secured work with the People's Republic of [[China]],<ref>{{cite news|title=The Guns of Saddam |author=William Scott Malon|newspaper=The Washington Post|url=https://www.washingtonpost.com/archive/opinions/1991/02/10/the-guns-of-saddam/e31bbb3a-52c3-4f29-bc47-cca57a80b6db/|access-date=2018-08-29|date=February 10, 1991}}</ref> and then [[Iraq]]. He designed two artillery pieces for the Iraqis: the 155&nbsp;mm ''Al-Majnoonan'', an updated version of the G5, and a similar set of adaptations applied to the 203&nbsp;mm US [[M110 howitzer]] to produce the 210&nbsp;mm [[Al-Fao]] with a maximum range of {{convert|56|km|mi|abbr=on}} without base bleed. Although it appears the Al-Fao was not put into production, the Al-Majnoonan started replacing Soviet designs as quickly as they could be delivered. When deliveries could not be made quickly enough, additional barrels were ordered from South Africa. The guns were built and sold through an [[Austria]]n intermediary.

Based on his HARP results, Bull secured additional Iraqi funding and support for the construction of a smoothbore gun barrel assembly. He received a $25m down-payment for the project on condition that he continued the development work on the ''Al-Majnoonan'' and ''Al-Fao'' guns.<ref name="BBC Future">{{cite news|title=The tragic tale of Saddam Hussein's 'supergun'|author=William Park|publisher=BBC|url=https://www.bbc.com/future/article/20160317-the-man-who-tried-to-make-a-supergun-for-saddam-hussein|access-date=2021-02-12|date=17 March 2016}}</ref> Initially, a smaller 45-meter, 350&nbsp;mm caliber gun (known as ''Baby-Babylon''){{sfnp|Schedel|1993|p=90}} was completed for testing purposes and then Bull started work on the "real" ''PC-2'' machine, a gun that was 150 meters long, weighed 1,510 tonnes, with a bore of one meter (39&nbsp;inches) that would allow the firing of multi-stage rocket-assisted shells with a range of over {{convert|5000|mi|km|abbr=on}} or to launch {{convert|1200|lb|kg|abbr=on}} satellites into orbit.<ref name="BBC Future"/> The project objective was to eventually provide Iraq with three 350&nbsp;mm ''Baby Babylon'' guns and two 1000&nbsp;mm PC-2 ''Big Babylon'' guns.{{sfnp|Schedel|1993|p=90}}

The Iraqis then told Bull they would go ahead with the project only if he would also help with development of their longer-range [[Scud]]-based missile project. Bull agreed. Construction of the individual sections of the new gun started in England at [[Sheffield Forgemasters]] and Matrix Churchill as well as in Spain, the [[Netherlands]], and [[Switzerland]] while he concurrently worked on the [[Scud]] project,<ref name="BBC Future"/> making calculations for the new nose cone needed for the greater re-entry speeds and temperatures the missile would face.