The Anti-Concorde Project, founded by environmental activist Richard Wiggs, challenged the idea of supersonic passenger transport, and curtailed Concorde's commercial prospects. When Concorde entered service in 1976, of the 74 options (non-binding orders, from 16 airlines) held at the time of the first flight, only those for the state airlines of Britain (BOAC) and France (Air France) were taken up, so that only 20 were built, although flights were also flown for Braniff International and Singapore Airlines. It triggered research into the factors affecting the creation of sonic booms, which led to the Shaped Sonic Boom Demonstration which achieved their goal of reducing the intensity of sonic booms (by about one-third), and echoed public concern about aircraft noise that resulted in more restrictive noise limits for aircraft and airport operations, as well as changes in both operating procedures and aircraft design to further reduce noise levels.
In the late 1950s, following the breaking of the sound barrier, first by experimental aircraft, then military aircraft, a supersonic passenger aircraft was thought feasible. By the early 1970s however, opposition led to bans on commercial supersonic flight in Sweden, Norway, the Netherlands, West Germany, Switzerland, Ireland, Canada and the United States. The choice of routes available was limited as supersonic flight was only possible outside built up areas, primarily over water, and few airfields were large enough for their takeoff runs. It was also clear that the aircraft was costly to build, and used more fuel per passenger per kilometer than other commercial aircraft at a time of rapidly rising fuel prices.
Research by aeronautics engineer Bo Lundberg, Director of the Swedish Aeronautical Research Institute in the early 1960s suggested that sonic booms and aircraft engine noise would not be widely accepted. [lower-alpha 1]
The Anti-Concorde Project was founded in 1966 by Richard Wiggs (a school teacher) to oppose the development of supersonic passenger transport. Wiggs positioned the Concorde as a test case in the confrontation between the environment and technology. [1]
An Anglo-French Agreement to build Concorde was signed in 1962. In 1963, The Observer newspaper published The Supersonic Threat, based on Lundberg's study Speed and Safety In Civil Aviation. [2] The article claimed that the Concorde's sonic booms would produce effects varying from annoyance to physical shock, breaking windows and causing structural damage to buildings. In letters to the paper, some readers wrote that this would be an "intolerable price for ordinary citizens to pay for the transportation of privileged business travelers" [3] A reader, Mr. D. W. Rowell, wrote that he would support an anti-Concorde movement, if only someone would organize it. [4] Public figures who wrote to newspapers expressing concern about the development of Concorde included Alec Guinness, and Pamela Hansford Johnson, and Baroness Snow.[ citation needed ] A primary school teacher, conscientious objector and vegan from Letchworth, Hertfordshire, Richard Wiggs, [5] wrote to The Observer inviting people to write to him. He received 80 letters the next day, and within a few months gave up teaching to become full-time organiser of the Anti-Concorde Project.
In a letter to The Times in July 1967, Wiggs wrote:
Anti-Concord Project [lower-alpha 2]
From Richard Wiggs
Sir, Miss Pamela Hansford and Sir Alec Guinness (July 5 and 10), and many other readers of 'The Times' may be glad to know of the existence of the Anti-Concord Project, which has been founded by a group of some hundreds of people including scientists, artists, business men, civil servants, farmers, housewives, professors, M.P.s etc. who are concerned and alarmed at the efforts being made to develop supersonic aircraft.We see this as a clear case of a choice having to be made – is technology to be sanely controlled or is it to be allowed increasingly to degrade and destroy our environment?
Our immediate aims are to help create in Britain a climate of public opinion in which it will be possible for the Government to terminate work upon Concord, and to press the Government to make this decision. Our further aim (in co-operation with similar movements in other countries) is to help bring about the banning of supersonic transports internationally.
We shall be glad to hear from people who agree with these aims.
Yours faithfully,
RICHARD WIGGS, Convener.
Before the new Labour government took office in October 1964 with a £700m annual deficit, Government-funded "prestige projects" such as the Concorde (with escalating costs) had been shortlisted for cancellation. The 1962 development estimates for Concorde were £150-170m, and had risen to £280m. Evidence of financial mismanagement also emerged and the UK Treasury, responsible for tracking government spending, had not been involved in drawing up the Anglo-French agreement to build Concorde, and was not represented on the Concorde Finance Committee.[ citation needed ] [lower-alpha 3] The British government announced the cancellation of the Concord on 19 November but rescinded it the next day due to agreements with France and to the massive layoffs that would have resulted, but did cancel other projects. [6] [ failed verification ] Wiggs believed that a strong enough lobby might have forced the cancellation. Wiggs began publishing claims about ozone depletion, sonic booms, airport noise, fuel consumption, potential profitability, and claimed that the taxpayer funded research and development costs would not be recovered [7] for what he regarded as an "elitist and inherently unsafe" transport. [5]
Wiggs corresponded with newspaper editors and other correspondents, disputing claims by the British Aircraft Corporation (the British partner in building the Concorde) and by Government Ministers responsible for the program. Letter-writing only went so far, and so Wiggs began advertising in the national press, initially in New Scientist , New Society and the New Statesman , and later, full page advertisements in The Guardian , The Times , and The Observer . The advertisements argued against supersonic transport, and requested donations for further advertisements. Later advertisements included the names of contributors.[ citation needed ]
Following his initial letters to the newspapers, Wiggs enlisted an Anti-Concorde Project Advisory Committee:
A sonic boom is a shock-wave, or pressure disturbance, caused by the movement of the plane through the air, much like the wave produced by the bow of a ship as it moves through water: just as the bow wave is produced for the entire journey of the ship, so the sonic shockwave occurs throughout the duration of a supersonic flight. [9]
In subsonic flight, the plane pushes the air ahead of it out of the way as it moves. When a plane is traveling faster than the speed of sound (i.e. faster than air molecules normally travel) the air ahead of it is not pushed out of the way: the air remains still until the plane has approached to within half an inch, at which point the air is forced aside in a few millionths of a second. This creates extreme local compression and heating, and a shockwave spreads outwards in a cone. This pressure wave extends as much as 25 miles on either side of the flight path, and may be experienced as a loud sound, with accompanying vibration severe enough in close proximity to break windows and damage buildings.
Development had begun before the effects of sonic boom tests had been conducted. During 1961 and 1962, 150 supersonic flights were made over St Louis, Missouri, in 1964, flights were made over Oklahoma City for five months, and in 1965, there was further testing over Chicago, Milwaukee, and Pittsburgh and finally, in 1966 and 1967 at Edwards Air Force Base in California. Animals were found to react more to the observers than to the sonic booms. [10]
Residents submitted claims for hundreds of thousands of dollars in damages from sonic booms for broken windows, cracked plaster, tile and brick. In addition, routine exercises flown by supersonic US Air Force jets resulted in $3,800,000 in sonic boom damage claims in a three-month period in 1967. [11] [ unreliable source? ]
In July 1967, the UK Ministry of Technology staged eleven supersonic test flights over the south of England using Lightning fighters. [12] The booms were to be measured by the RAF to relate them to the resulting public reaction. [13] The Guardian's opinion survey stated: "Nearly two thirds of the population of Bristol were frightened, startled or annoyed by the sonic booms to which they were subjected to last week." [14] The Ministry received 12,000 complaints. [15] [ failed verification ]
Both Wiggs and the Anti-Concord Project claimed that the Concorde was louder than conventional aircraft on take-off and landing as a result of its delta wing being optimized for high speeds so it needed to use more power than conventional aircraft. When measured in 1977, the British Civil Aviation Authority (CAA) noted: [16]
On departure, the Concorde was generally a few PNdb noiser than the older long-range jets at the fixed monitoring points and noticeably noisier both closer to and further from the airport. At the arrival sites, Concorde was a few PNdb noisier than the older long range jets, except at 1.5 km from runway threshold, where it was on a par with the B 707.
In the US, the Concorde noise was measured at DFW and Dulles airports: [17]
Based on the data given in Tables 11 and 12, it appears that the approach noise of the Concorde is somewhat higher than that for present day commercial aircraft. The takeoff noise is, for locations close the airport, considerably higher than present aircraft.
Considerably higher, here, means more than an order of magnitude (10 db) louder.
In late 1969, the British Aircraft Corporation referred to "the assumption that supersonic flight will be allowed only over the oceans or over areas with sparse populations" as "extremely pessimistic" saying that they "do not expect that its sonic boom will be unacceptable to the great majority of the public." [18]
After the appearance of the first Anti-Concorde Project advertisement in New Scientist, Professor John J. Edsell, of Harvard University, began corresponding with Wiggs. A few months later, Edsell, together with Dr. William A. Shurcliff, a physicist and senior research associate at the Cambridge Electron Accelerator, founded the Citizens' League Against the Sonic Boom in March 1967. [19] Andrew Wilson wrote: The League "adopted the same propaganda techniques as the Project with astounding success." [20] In December 1970, the US Senate voted to prohibit commercial supersonic flights over the US and to restrict noise levels at US airports.
Sweden, Norway, the Netherlands, West Germany and Switzerland indicated that they would be unlikely to permit supersonic over-flights. [lower-alpha 6] Ireland drafted legislation, and Canada prohibited supersonic over-flight. Opposition and route restrictions aside, the BOAC and Air France maintained plans to fly supersonic over "sparsely populated" regions such as the deserts of Africa, Saudi Arabia and Australia.
Restricting supersonic flight to over water meant that when Concorde entered service in January 1976, the only routes it flew were London – Bahrain, Paris – Rio and Paris – Caracas. Despite the ban, in May 1976 flights were allowed into Washington Dulles International Airport. When the Federal ban was lifted at John F. Kennedy International Airport (JFK), Carol Berman and the Emergency Coalition to Stop the SST, with help from Wiggs, organized opposition which led to New York City imposing its own ban. Nine months later, a Supreme Court ruling allowed flights into JFK.
In December 1977 the aircraft flew the London – Singapore round trip route three times in Singapore Airlines livery before the Malaysian government rescinded permission from overflying their airspace, likely as a result of their own airline being denied increased access to London. Concorde was also denied permission to overfly India as the United Kingdom government was unwilling to grant additional flight slots or Fifth freedom rights. [21]
The Modern Records Centre, University of Warwick holds a collection of archives of the Anti-Concorde Project, comprising publicity material issued by the Project, 1967–1981, minutes and agendas of the Advisory Committee, and subject files compiled by the Secretary of the Project. The collection also includes press cuttings, reports and publications. [22]
The 2003 BBC2 documentary, Concorde – A Love Story [23] aired in the US in 2005 as a PBS Nova documentary, Supersonic Dream, and includes archival footage of Wiggs and interviews with family members. As narrator Richard Donat explains: "In Britain, Concorde's nemesis came in the guise of a retired schoolteacher, Richard Wiggs. Working from his family home, his aim was simple: to stop Concorde from flying." [24]
Concorde is a retired Anglo-French supersonic airliner jointly developed and manufactured by Sud Aviation and the British Aircraft Corporation (BAC). Studies started in 1954, and France and the United Kingdom signed a treaty establishing the development project on 29 November 1962, as the programme cost was estimated at £70 million . Construction of the six prototypes began in February 1965, and the first flight took off from Toulouse on 2 March 1969. The market was predicted for 350 aircraft, and the manufacturers received up to 100 option orders from many major airlines. On 9 October 1975, it received its French Certificate of Airworthiness, and from the UK CAA on 5 December.
The Tupolev Tu-144 is a Soviet supersonic passenger airliner designed by Tupolev in operation from 1968 to 1999.
The Whitcomb area rule, named after NACA engineer Richard Whitcomb and also called the transonic area rule, is a design procedure used to reduce an aircraft's drag at transonic speeds which occur between about Mach 0.75 and 1.2. For supersonic speeds a different procedure called the supersonic area rule, developed by NACA aerodynamicist Robert Jones, is used.
Supersonic speed is the speed of an object that exceeds the speed of sound (Mach 1). For objects traveling in dry air of a temperature of 20 °C (68 °F) at sea level, this speed is approximately 343.2 m/s. Speeds greater than five times the speed of sound (Mach 5) are often referred to as hypersonic. Flights during which only some parts of the air surrounding an object, such as the ends of rotor blades, reach supersonic speeds are called transonic. This occurs typically somewhere between Mach 0.8 and Mach 1.2.
The sound barrier or sonic barrier is the large increase in aerodynamic drag and other undesirable effects experienced by an aircraft or other object when it approaches the speed of sound. When aircraft first approached the speed of sound, these effects were seen as constituting a barrier, making faster speeds very difficult or impossible. The term sound barrier is still sometimes used today to refer to aircraft approaching supersonic flight in this high drag regime. Flying faster than sound produces a sonic boom.
The Boeing 2707 was an American supersonic passenger airliner project during the 1960s. After winning a competition for a government-funded contract to build an American supersonic airliner, Boeing began development at its facilities in Seattle, Washington. The design emerged as a large aircraft with seating for 250 to 300 passengers and cruise speeds of approximately Mach 3. It was intended to be much larger and faster than competing supersonic transport (SST) designs such as Concorde.
A sonic boom is a sound associated with shock waves created when an object travels through the air faster than the speed of sound. Sonic booms generate enormous amounts of sound energy, sounding similar to an explosion or a thunderclap to the human ear.
A supersonic transport (SST) or a supersonic airliner is a civilian supersonic aircraft designed to transport passengers at speeds greater than the speed of sound. To date, the only SSTs to see regular service have been Concorde and the Tupolev Tu-144. The last passenger flight of the Tu-144 was in June 1978 and it was last flown in 1999 by NASA. Concorde's last commercial flight was in October 2003, with a November 26, 2003 ferry flight being its last airborne operation. Following the permanent cessation of flying by Concorde, there are no remaining SSTs in commercial service. Several companies have each proposed a supersonic business jet, which may bring supersonic transport back again.
Sud Aviation was a French state-owned aircraft manufacturer, originating from the merger of Sud-Est and Sud-Ouest on 1 March 1957. Both companies had been formed from smaller privately owned corporations that had been nationalized into six regional design and manufacturing pools just prior to the Second World War.
The Boeing Sonic Cruiser was a concept jet airliner with a delta wing–canard configuration. It was distinguished from conventional airliners by its delta wing and high-subsonic cruising speed of up to Mach 0.98. Boeing first proposed it in 2001, but airlines generally preferred lower operating costs over higher speed. Boeing ended the Sonic Cruiser project in December 2002 and shifted to the slower but more fuel-efficient 7E7 airliner.
The Jet Age is a period in the history of aviation defined by the advent of aircraft powered by jet turbine engines and the social and cultural changes fostered by commercial jet travel.
A supersonic aircraft is an aircraft capable of supersonic flight, that is, flying faster than the speed of sound. Supersonic aircraft were developed in the second half of the twentieth century. Supersonic aircraft have been used for research and military purposes, but only two supersonic aircraft, the Tupolev Tu-144 and the Concorde, ever entered service for civil use as airliners. Fighter jets are the most common example of supersonic aircraft.
The Oklahoma City sonic boom tests, also known as Operation Bongo II, refer to a controversial experiment, organized by the Federal Aviation Administration (FAA), in which 1,253 sonic booms were generated over Oklahoma City, Oklahoma, over a period of six months starting in February 1964. The experiment was intended to quantify the effects of transcontinental supersonic transport (SST) aircraft on a city, to measure the booms' effect on structures and public attitude, and to develop standards for boom prediction and insurance data.
Wallace Dean Hayes was a professor of mechanical and aerospace engineering at Princeton University and one of the world's leading theoretical aerodynamicists, whose numerous and fundamental contributions to the theories of supersonic and hypersonic flow and wave motion strongly influenced the design of aircraft at supersonic speeds and missiles at hypersonic speeds. This greatly enhanced the development of supersonic flight and supersonic aircraft design.
Quiet Spike was a collaborative program between Gulfstream Aerospace and NASA's Dryden Flight Research Center to investigate the suppression of sonic booms. The patent was published with the United States Patent and Trademark Office in 2004 and is owned by Gulfstream Aerospace.
The High Speed Civil Transport (HSCT) was the focus of the NASA High-Speed Research (HSR) program, which intended to develop the technology needed to design and build a supersonic transport that would be environmentally acceptable and economically feasible. The aircraft was to be a future supersonic passenger aircraft, baselined to cruise at Mach 2.4, or more than twice the speed of sound. The project started in 1990 and ended in 1999.
The Gulfstream X-54 is a proposed research and demonstration aircraft, under development in the United States by Gulfstream Aerospace for NASA, that is planned for use in sonic boom and supersonic transport research.
The Zero Emission Hyper Sonic Transport or ZEHST is a planned hypersonic passenger jet airliner project by the multinational aerospace conglomerate EADS and the Japanese national space agency JAXA.
The Lockheed Martin X-59 Quesst, sometimes styled QueSST, is an American experimental supersonic aircraft under development by Skunk Works for NASA's Low-Boom Flight Demonstrator project. Preliminary design started in February 2016, with the X-59 planned to begin flight testing in 2021. After delays, as of January 2024, it is planned to be delivered to NASA for flight testing in 2024. It is expected to cruise at Mach 1.42 at an altitude of 55,000 ft (16,800 m), creating a low 75 effective perceived noise level (EPNdB) thump to evaluate supersonic transport acceptability.
The Boom Overture is a proposed supersonic airliner under development by Boom Technology. Its design will be capable of traveling Mach 1.7, with 64–80 passengers depending on configuration, and 4,250 nmi of range. The Overture is planned to be introduced in 2029. The company claims that with 500 viable routes, there could be a market for up to 1,000 supersonic airliners with fares similar to business class. The aircraft is planned to have a delta wing configuration, but will be built with composite materials. Following a redesign revealed in 2022, it is intended to be powered by four dry (non-afterburning) 35,000 lbf (160 kN) turbofans.