Space Research Corporation
Space Research Corporation was a Canadian aerospace and artillery-development company founded by Gerald Bull to commercialize long-range gun and supergun technology.
Last updated August 26, 2026
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Overview
Space Research Corporation (SRC) was a Canadian aerospace and artillery-technology company established by Gerald Bull after government support for Project HARP was withdrawn in 1967. Bull had developed the concept of using a very large cannon to launch projectiles, potentially including satellites, into the upper atmosphere or orbit. When the Canadian government and the United States Army ended their backing for HARP, the newly formed SRC received the project's assets and became the commercial vehicle for Bull's continuing research. The company was based at a large experimental site near Highwater, Quebec, extending across the Canada–United States border toward Jay, Vermont. Its principal property covered approximately 6,000 acres and included major test and research infrastructure. SRC was associated with a group of related or affiliated entities, including SRC Quebec, Shefford Electronics Corporation of Granby, SRCI, Paragon, the Belgian company PRB, and SRC Belgium. These relationships supported engineering, electronics, manufacturing, and international commercial activities, although the precise corporate structure varied over time. SRC's early identity was closely connected to ballistic research and the legacy of Project HARP. Bull had previously worked at Canada's Armaments and Research Development Establishment and at McGill University, where he collaborated with Donald Mordell and developed the HARP program with support from the U.S. Army's Ballistic Research Laboratory. HARP explored the use of enormous naval gun barrels, radar tracking, and specialized projectiles for high-velocity launches. SRC inherited equipment and technical knowledge from that work, including a large experimental cannon at the Highwater site. During the 1970s, SRC increasingly concentrated on artillery systems that could be sold to governments and defense contractors. Its best-known development was the GC-45, a 155 mm, 45-calibre howitzer designed around an extended-range projectile known as ERFB, or extended range full bore. The projectile used improved aerodynamic shaping and other design features to reduce drag and increase range. When paired with a base-bleed system developed in Sweden, the gun and ammunition combination was reported to achieve substantially greater range than standard NATO artillery of the period. The technology became especially associated with South Africa's G5 howitzer and was also connected with contracts or work involving China, Chile, Taiwan, and other governments. SRC's commercial success was undermined by its supply of artillery equipment and ammunition to South Africa during the apartheid era. In 1977, the United Nations had imposed a mandatory arms embargo on South Africa. SRC nevertheless supplied gun barrels and approximately 30,000 shells to the South African government, in a transaction reported to have been worth more than US$30 million. Gerald Bull and his business associate Rogers Gregory were prosecuted in the United States. Bull pleaded guilty and served four months in prison in 1980. The case became controversial because allegations of covert encouragement or assistance by U.S. intelligence and other parties were not fully examined in court after the guilty plea. Following the embargo violation and Bull's conviction, the original Canadian SRC was liquidated. The business was later re-established in Brussels, where Bull continued to manage related activities for several years. The company did not survive as a continuing independent brand after Bull's death in 1990. Space Research Corporation is therefore chiefly remembered for linking space-gun research with commercially developed long-range artillery, and for the legal and political consequences of its South African arms dealings.
History
Space Research Corporation emerged from the collapse of government support for Project HARP, a Cold War-era attempt to investigate whether very large guns could launch objects to extreme altitudes and perhaps provide an alternative to conventional rockets. Gerald Bull had developed an interest in high-velocity projectile research while working on anti-ballistic-missile and intercontinental-ballistic-missile studies at Canada's Armaments and Research Development Establishment. After joining McGill University, he worked with engineering dean Donald Mordell and obtained support from the United States Army's Ballistic Research Laboratory. The HARP program was formally announced in 1962 and used surplus naval gun barrels, propellant charges, radar, and a large test facility at Highwater, Quebec. The program attracted attention because it combined artillery engineering with atmospheric and space research. In 1965, McGill sponsored an aeroballistic laboratory at Highwater, with Bull as director. The research tested projectiles and launch methods intended to achieve very high velocities and gather data in the upper atmosphere. In late 1966, the Canadian government announced that it would stop funding HARP after June 1967. The Canadian government and the U.S. Army withdrew their support the following year, effectively ending the publicly supported program. Bull created Space Research Corporation to preserve and commercialize the work, and HARP assets were transferred to the new company. SRC retained a large cross-border research property and continued to use the site for experimental engineering. Bull also pursued related academic and research work, including an aerospace science program at Norwich University. The company gradually moved away from the most speculative aspects of satellite launch by cannon and toward defense contracts. SRC worked with or for governments and industrial partners in several countries, including China, Chile, Taiwan, and South Africa. Its central commercial achievement was the GC-45, a 155 mm, 45-calibre artillery piece. The gun was paired with an extended-range full-bore projectile designed by Bull. Compared with conventional artillery ammunition, the projectile used a more aerodynamic shape and features intended to reduce drag while maintaining stability. A Swedish base-bleed system could extend the effective range further. The resulting combination was reported to exceed the range of standard NATO artillery by a substantial margin. The GC-45 technology became particularly important in South Africa, where it was adapted into the G5 howitzer. South African funding supported the work, and the weapons were later used in the regional conflict involving Angola. The development demonstrated SRC's ability to convert experimental ballistic research into a deployable artillery system, but it also exposed the company to international sanctions and political risk. In 1977, the United Nations imposed a mandatory arms embargo on South Africa because of the apartheid government's policies. SRC nevertheless supplied South Africa with gun barrels and approximately 30,000 shells. The reported value of the shipment exceeded US$30 million. The transaction was associated with the vessel MV Tugelaland and became the basis for prosecution in the United States. Gerald Bull and Rogers Gregory were charged; Bull pleaded guilty and was imprisoned for four months in 1980. Bull had expected a financial penalty and reportedly resented the prison sentence. His guilty plea also meant that claims concerning possible covert support or encouragement by U.S. officials and intelligence actors were not fully tested in court. The embargo violation led to liquidation of the original Canadian company. Related operations were later incorporated or reorganized in Brussels, where Bull continued his work for a period. The broader network included entities in Quebec, Belgium, and elsewhere, but it did not restore SRC as a durable international corporation. Bull was murdered in Brussels in 1990. Space Research Corporation is now a defunct historical company remembered for its unusual combination of space-gun experimentation, advanced artillery engineering, cross-border defense contracting, and sanctions-related controversy.
- 1990
Death of Gerald Bull
[1]Bull was murdered in Brussels, ending the career of the company's founder and the principal figure behind its later operations.
- 1980
Gerald Bull imprisoned after arms-export conviction
[1]Bull pleaded guilty in the United States and served four months in prison. The Canadian SRC was liquidated after the case.
- 1977
South African arms shipment
[1]SRC supplied artillery equipment and ammunition to South Africa despite the United Nations arms embargo.
- 1967
Space Research Corporation founded
[1]After Canadian and U.S. government support for Project HARP ended, Bull established SRC and received the project's assets.
- 1965
Aeroballistic laboratory established at Highwater
[1]McGill sponsored an aeroballistic laboratory at Highwater, Quebec, with Bull serving as director.
- 1962
Project HARP formally announced
[1]Gerald Bull and Donald Mordell publicly presented the McGill-linked High Altitude Research Project, establishing the research foundation from which SRC later emerged.
Products and positioning
A specialized defense-technology and aerospace research company focused on increasing the range and performance of large-calibre artillery and exploring cannon-based space launch concepts.
155 mm long-range artillery
GC-45 howitzer
The GC-45 was SRC's best-known artillery system. It was a 155 mm, 45-calibre gun designed to fire both standard 155 mm ammunition and specialized extended-range projectiles. Its longer barrel and ammunition system were intended to deliver greater range and accuracy than contemporary standard NATO artillery. The design was later associated with South Africa's G5 howitzer and influenced subsequent long-range artillery development.
Extended-range artillery ammunition
ERFB projectile
ERFB, meaning extended range full bore, was a projectile developed for improved aerodynamic performance in large-calibre artillery. Its pointed form, fin-related stability features, and supporting driving surfaces were intended to reduce drag while preserving accuracy. When used with a base-bleed system, the projectile and gun combination could achieve substantially longer ranges than conventional 155 mm systems.
Aerospace and high-velocity research · 1967
HARP-derived supergun research
SRC inherited large-calibre gun equipment and research assets from Project HARP. The work explored the use of enormous cannons to launch experimental projectiles to high altitude and investigate the possibility of cannon-based satellite launch. The Highwater site included a cannon reported to measure approximately 172 feet, although the space-launch concept did not become a commercial operating system.
Controversies
1980
United States prosecution of Gerald Bull
Gerald Bull pleaded guilty in the United States over the South African arms exports and served four months in prison. The case contributed to the liquidation of the Canadian SRC.
1977
Arms sales to apartheid South Africa
SRC supplied South Africa with artillery barrels and approximately 30,000 shells despite the mandatory United Nations arms embargo imposed on the apartheid regime. The transaction became the company's defining legal controversy.
Brand decisions
1980
Reorganization after liquidationOtherBackground
The original Canadian corporation was liquidated following the arms-export case.
Action taken
Related operations were subsequently incorporated or reorganized in Brussels.
Aftermath
Bull continued related activities for several years, but SRC did not return as a durable Canadian company.
1970
Development of the GC-45 and ERFB systemProduct launchBackground
SRC sought a commercially viable defense application for its high-velocity ballistic expertise.
Action taken
The company developed a long-range 155 mm artillery system and specialized extended-range ammunition, later linked to the South African G5.
Aftermath
The system gained international attention and contracts but also placed SRC at the center of the South African arms-embargo controversy.
1967
Commercialize Project HARP technologyStrategyBackground
Government funding for Project HARP was withdrawn, placing its facilities and experimental program at risk of closure.
Action taken
Gerald Bull created SRC to receive the HARP assets and pursue the underlying ballistic technology through commercial and government contracts.
Aftermath
SRC survived as a private defense-technology company and increasingly focused on artillery rather than space launch.
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