Tizard Mission
The Tizard Mission, officially the British Technical and Scientific Mission, was a delegation from the United Kingdom that visited the United States during World War II to share secret
The mission travelled to the U.S. in September 1940 during the Battle of Britain. They conveyed a number of British technical and scientific secrets with the objective of securing U.S. assistance in sustaining the war effort and obtaining the industrial resources to exploit the military potential of these technologies, which Britain itself could not fully use, due to the immediate demands of other war-related production.
Referring to one such British secret, a device known as a resonant cavity magnetron, American historian James Phinney Baxter III later wrote, "When the members of the Tizard Mission brought one to America in 1940, they carried the most valuable cargo ever brought to our shores."[1] The mission also opened up channels of communication for jet engine and atomic bomb development, leading to the British contribution to the Manhattan Project, and catalyzed Allied technological cooperation during World War II.
The Tizard mission is seen as one of the key events that forged the wartime Anglo-American alliance. After the war, it became the foundation for future cooperation in scientific research at institutions within and across the United States, United Kingdom and Canada.
Preparation and objectives
Britain made significant scientific advances in military technology, weapons and their components before World War II began in September 1939.[2][3][4] After the Fall of France in June 1940, which saw Germany overrun most of the countries of Western Europe, Germany's planned invasion of the United Kingdom, Operation Sea Lion, was preceded by its effort to establish air superiority in the Battle of Britain.
The
Moving the secrets
After Churchill's approval of the project, the team began gathering all technical secrets which had potential military uses. At the end of August, Tizard went to the U.S. by air to make preliminary arrangements. The rest of the mission would follow by ship. They were:
- Brigadier F.C. Wallace MC (British Army)
- Captain H.W. Faulkner (Royal Navy)
- Group CaptainF.L. Pearce (Royal Air Force)
- Professor John Cockcroft (Army Research) - nuclear physicist and Assistant Director of Scientific Research at the Ministry of Supply[nb 1]
- Edward George Bowen (radar)[6]
- Arthur Edgar Woodward-Nutt, an Air Ministry official (secretary)
All the documents were gathered in a small trunk: a lockable metal
The team arrived in
Meetings
Tizard met Vannevar Bush, the chairman of the National Defense Research Committee, on 31 August 1940, and arranged a series of meetings with each division of the NDRC. When the American and British teams met, there was initially some cautious probing by each side to avoid giving away too much without getting anything back in exchange.[7] At a meeting hosted by NDRC's two-month-old "Microwave Committee" chairman Dr Alfred Loomis[8] at the Wardman Park Hotel on 19 September 1940 the British disclosed the technical details of the Chain Home early warning radar stations. The British thought the Americans did not have anything like this, but found it was virtually identical to the US Navy's longwave CXAM radar.
The Americans then described their microwave research done by Loomis and
Britain was interested in the Norden bombsight. President Roosevelt apologised and said that it was not available to Britain unless it could be shown that the Germans had something similar. Tizard was not unduly dismayed as he thought there were other US technologies more useful to Britain than the bombsight, and he asked for the unit's external dimensions so that British bombers could be modified to take it, if it became available at some future date.[10]
GEC at Wembley made 12 prototype cavity magnetrons in August 1940, and No 12 was sent to America with Bowen, where it was shown on 19 September 1940 in Alfred Loomis’ apartment. The American NDRC Microwave Committee was stunned at the power level produced. However, the Bell Labs director was upset when it was X-rayed and had eight holes rather than the six holes shown on the GEC plans. After contacting (via the transatlantic cable) Dr Eric Megaw, GEC’s vacuum tube expert Megaw recalled that when he had asked for 12 prototypes he said make 10 with 6 holes, one with 7 and one with 8; there was no time to amend the drawings. And No 12 with 8 holes was chosen for the Tizard Mission. So Bell Labs chose to copy the sample; and while early British magnetrons had six cavities the American ones had eight cavities.[11]
Bowen stayed in America, and a few days later, at the General Electric labs in New Jersey, he showed the Americans that the magnetron worked. The
The Tizard delegation also visited
Tizard met with both Vannevar Bush and
Outcome and subsequent events
The Tizard mission was hailed as a success, especially for its impact on the subsequent development and deployment of radar as well as wider Allied technological cooperation during World War II. Although the German bombing of the UK was largely over by the time that the new radar systems were in production, technology such as aircraft radar and LORAN navigation greatly helped the Allied war effort in Europe and the Pacific. The development of the cavity magnetron, a key radar component, would enable the production of radar units small enough to be installed in night fighters, allow antisubmarine aircraft to locate surfaced U-boats and provide great navigational assistance to bombers. It is considered to be a significant factor in the eventual Allied victory in the Second World War.[7][9] According to James Phinney Baxter III, Official Historian of the Office of Scientific Research and Development: "[T]he greatest of [British] contributions to radar was the development of the resonant cavity magnetron.... This revolutionary discovery... was the first tube capable of producing power enough to make radar feasible at wave lengths of less than 50 centimeters. When the members of the Tizard Mission brought one to America in 1940, they carried the most valuable cargo ever brought to our [i.e., U.S.] shores. It sparked the whole development of microwave radar".[15]
The Tizard mission caused the foundation of the
When they returned to the UK in November 1940, the delegation reported that the slow neutron research conducted by French exiles in Cambridge, Columbia (by Fermi) and Canada (by Laurence) was probably irrelevant to the war effort. Nonetheless, since nuclear boilers could have some post-war value, they arranged for some financial support for the Canadian fission experiments. George Laurence later became involved in the secret exchanges of nuclear information between the British and the Americans. The British recognized the atomic bomb was a serious possibility when Franz Simon reported in December 1940 to the British MAUD Committee that it was feasible to separate the isotope uranium-235. Following this, the British created a nuclear weapons project, code named Tube Alloys, and encouraged the United States to begin this type of research, which became the Manhattan Project.[12]
Legacy
The Tizard Mission is seen as one of the key events in forging the wartime
Notes
- ^ John Cockcroft would receive a Nobel prize in 1951.
References
- ^ Baxter III 1946, p. 142.
- ^ James W. Brennan, "The Proximity Fuze: Whose Brainchild?," U.S. Naval Institute Proceedings (1968) 94#9 pp 72–78.
- ^ Paul Kennedy, Engineers of Victory: The Problem Solvers Who Turned The Tide in the Second World War (2013)
- ^ Roberts, Eric (16 March 2004). "British Technology and the Second World War". Stanford University. Archived from the original on 21 June 2015. Retrieved 26 April 2015.
British science and technology was instrumental in winning the Second World War. This course looks at several different technological innovations undertaken in Britain in the context of the wartime period: the breaking of the German Enigma code at Bletchley Park (which Winston Churchill credited with having won the Battle of the Atlantic), the development of radar, the advances in wartime medicine and pharmacology (most notably, the first practical uses of penicillin), and the participation by British scientists in the Manhattan Project.
- ^ "Radar". Newsweek. 2 December 1997.
- ^ Brown, Minnett & White 1992.
- ^ ISBN 978-1-4738-2020-3.
- ^ a b Conant 2002, pp. 168–169, 182.
- ^ a b Hind 2007.
- ^ Zimmerman 1996, p. 99.
- ^ Fine 2019, pp. 56–64.
- ^ JSTOR 26004450.
- ^ Zimmerman 1996, p. 120.
- ^ a b c Dawson 1988, Chapter 3.
- ^ Baxter III 1946, pp. 141–142.
- ^ "How the Tizard Mission paved the way for research at MIT". MIT News | Massachusetts Institute of Technology. 23 November 2015. Retrieved 14 January 2023.
- ^ "The Tizard Mission: 75 years on | Imperial News | Imperial College London". Imperial News. 2 December 2015. Retrieved 14 January 2023.
- ^ "Tizard Mission75th Anniversary Commemoration" (PDF). Office of Naval Research, the British Embassy Washington, and the Embassy of Canada in Washington. Retrieved 14 January 2023.
- ^ "'Desperate act of trust': US, allies recall and renew scientific ties". EurekAlert!. Retrieved 14 January 2023.
- ^ "The Tizard Mission – 75 Years of Anglo-American Technical Alliance". National Air And Space Museum. Retrieved 14 January 2023.
- ^ "The Tizard Mission: 75 Years of Transatlantic Partnership on Science and Technology". GOV.UK. Retrieved 14 January 2023.
- ^ "Tizard Mission 75th Anniversary Commemoration". DVIDS. Retrieved 14 January 2023.
Sources
- Baxter, James Phinney III (1946). Scientists Against Time. Boston: Little, Brown, and Co.
- Brown, R. Hanbury; Minnett, Harry C.; White, Frederick W.G. (1992). "Biographical Memoirs: Edward George Bowen 1911–1991". Australian Academy of Science. Archived from the original on 21 December 2010. (Originally published in Historical Records of Australian Science, vol.9, no.2, 1992. It also appeared in Biographical Memoirs of Fellows of the Royal Society of London, 1992.)
- Conant, Jennet (2002). Tuxedo Park. New York, NY: Simon & Schuster. pp. 168–169, 182. ISBN 0-684-87287-0.
- Dawson, Virginia P. (1988). "Chapter 3: Jet Propulsion: Too Little, Too Late". SP-4306 Engines and Innovation: Lewis Laboratory and American Propulsion Technology.
- Hind, Angela (5 February 2007). "Briefcase 'that changed the world'". BBC News. Retrieved 25 May 2010.
- Zimmerman, David (1996). Top secret exchange: the Tizard mission and the scientific war (illustrated ed.). McGill-Queen's Press - MQUP. pp. 99 120. ISBN 978-0-7735-1401-0.
Further reading
- Fine, Norman (2019). Blind Bombing: How Microwave Radar brought the Allies to D-Day and Victory in World War II. Nebraska: Potomac Books/University of Nebraska Press. pp. 24–26 & 55–64. ISBN 978-1640-12279-6.
- Phelps, Stephen (2010). The Tizard Mission: the Top-Secret Operation that Changed the Course of World War II. Yardley, Pennsylvania: Westholme. OCLC 642846903.
External links
- The Tizard Mission - the start of a special relationship? BBC
- "Tell Me Your Secrets" - An interactive graphic novel BBC
- Radar and the Tizard Mission
- Bowen's account from Radar World
- Detailed description of the Mission - La Physique au Canada Nov/Dec 2001
- The Tizard Mission Oxford University podcast
- The Tizard Mission Bournemouth University
- "Destroyer of Worlds". Archive on 4. 11 July 2015. Retrieved 1 September 2023. Radio programme describing how "Britain invented the bomb and the Americans made it".