Concord
or Concorde (pronounced kon-kawrd)
(1) Agreement between persons,
groups, nations, etc.; concurrence in attitudes, feelings, etc; unanimity;
accord; agreement between things; mutual fitness; harmony.
(2) In formal grammar, a technical
rule about the agreement of words with one another (case, gender, number or person).
(3) A treaty; compact; covenant.
(4) In music, a stable, harmonious
combination of tones; a chord requiring no resolution.
(5) As concordat, under
Roman-Catholic canon law, a convention between the Holy See and a sovereign
state that defines the relationship between the Church and the state in matters
that concern both.
(6) In law, an agreement between the
parties regarding land title in reference to the manner in which it should
pass, being an acknowledgment that the land in question belonged to the
complainant (obsolete).
(7) A popular name for locality, commercial operations and products such as ships, cars etc.
(8) In horticulture, a variety of sweet American grape, named circa 1853 after Concord, Massachusetts, where the variety was developed.
1250-1300: From the Middle English
and twelfth century Old French concorde (harmony,
agreement, treaty) & concorder, from the Latin concordare & concordia,
(harmonious), from concors (of the same mine; being in agreement with) (genitive concordis
(of the same mind, literally “hearts together”)). The construct was an assimilated form of com (con-)
(with; together) + cor (genitive cordis (heart) from the primitive Indo-European
root kerd (heart)). The "a compact or agreement" in the sense of something formal (usually in writing) dates from the late fifteenth century, an extension of use from the late fourteenth century transitive verb which carried the sense "reconcile, bring into harmony". From circa 1400 it had been understood to mean "agree, cooperate, thus a transfer of sense from the Old French & Latin forms. Concorde was the French spelling which eventually was adopted also by the British for the supersonic airliner after some years of linguistic squabble. Concord is a noun & verb, concordance & concordat are nouns, concorded & concording are verbs and concordial & concordant are adjectives; the noun plural is concords.
The Concorde and other SSTs
Promotional rendering of Concorde in British Overseas Airways Corporation (BOAC) livery. BOAC was the UK's national carrier between 1940-1974 when merged with British European Airways (BEA) to form British Airways (BA).
Concorde was an Anglo-French
supersonic airliner that first flew in 1969 and operated commercially between
1976-2003. It had a maximum speed
over twice the speed of sound (Mach 2.04; 1,354 mph (2,180 km/h)) and seated
92-128 passengers. Man breaking the
sound barrier actually wasn’t modern; the cracking of a whip, known for thousands
of years, is the tip passing through the sound barrier and engineers were well
aware of the problems caused by propellers travelling that fast but it wasn’t
until 1947 that a manned aircraft exceeded Mach 1 in controlled flight (although it had been achieved in deep dives though not without structural damage). The military were of course immediately interested
but so were those who built commercial airliners, intrigued at the notion of transporting
passengers at supersonic speed, effectively shrinking the planet. By the late 1950s, still recovering from the
damage and costs of two world wars, France and the UK were never going to be in
a position to be major players in the space-race which would play-out between
the US and USSR but civil aviation did offer possibilities for both nations to
return to the forefront of the industry. France, in the early days of flight
had been the preeminent power (a legacy of that being words like fuselage and aileron) and UK almost gained an early lead in passenger jets
but the debacle of the de Havilland Comet (1949) had seen the Boeing 707 (1957) assume dominance. The supersonic race was thought to be the
next horizon and the UK’s Supersonic Transport Aircraft Committee (STAC) was in
1956 commissioned with the development of a Supersonic Transport (SST) for commercial
use.

Concordes exist in a number of flight simulator programs; this is
Colimata's Concorde v1.10 in BA livery.
The committee’s early research soon
established it was going to be an expensive undertaking so the UK sought
partners; the US declined but in 1962 the UK and France signed the Anglo-French
Concorde agreement, a framework for cooperation in the building of the one SST.
The choice of name actually came some months
after the engineering concord was signed, the manufacturers submitting to the
UK
cabinet the names Concord and Concorde, it being thought desirable to have
something which sounded and meant the same in both languages (the French had
already agreed it shouldn’t be called the
Super-Caravelle the project name for
a smaller SST on which some work had been done in 1960).
The other suggestions put to cabinet were
Alliance or
Europa. In the cabinet discussions in London, Alliance was thought to be "too military" and Europa offended those Tories who still hankered for the "
splendid isolation" which had been the British view on European matters in the previous century. Even in the nineteenth century age of
Pax Britannica splendid isolation had been somewhat illusory but in the Tory Party the words still exerted a powerful pull.

The French-built Concorde 001's roll-out, Toulouse Blagnac airport, 11 December 1967.
There is some dispute about whether
the cabinet ever formally agreed to use the French spelling but, like much in
English-French relations over the centuries, the entente proved not always
cordial and the name was officially changed to Concord by UK Prime Minister Harold
Macmillan (later First Earl Stockton, 1894–1986; UK prime-minister 1957-1963) in response to him feeling slighted by Charles
de Gaulle (1890-1970; President of France 1958-1969) when Le President vetoed
the UK’s application to join the European Economic Community (the EEC which evolved into the present Day EU of which the UK was a member between 1973-2020). However, the Labour party won office in the 1964
general election and by the time of the roll-out in Toulouse in 1967,
the UK’s Minister for Technology, Tony Benn (Anthony Wedgwood Benn, 1925–2014, formerly
the second Viscount Stansgate) announced he was changing the
spelling back to Concorde. There were not many
eurosceptics in the (old) Labour Party back then.

Concorde taking off, 1973 Paris Air Show, the doomed Tupolev Tu-144 in the foreground.
The engineering challenges were
overcome and in 1969, some months before the moon landing, Concorde made its
maiden flight and, in 1973, a successful demonstration flight was performed at
the same Paris air show at which its Soviet competitor Tupolev Tu-144 crashed. Impressed, more than a dozen airlines placed
orders but within months of the Paris show, the first oil shock hit and the
world entered a severe recession; the long post-war boom was over. A quadrupling in the oil price was quite a
blow for a machine which burned 20% more fuel per mile than a Boeing 747 yet
typically carried only a hundred passengers whereas the Jumbo could be
configured for between four and five hundred.
That might still have been viable had have oil prices remained low and a
mass-market existed of people willing to pay a premium but with jet fuel
suddenly expensive and the world in recession, doubts existed and most orders
were immediately cancelled.

Concorde 002 on public display at BAC's (British Aircraft Corporation) airfield, Filton, Bristol, site of its construction.
Eventually, only twenty were built,
operated only by BOAC (BEA/BA) and Air France, early hopes of mass-production
never materialized; while orders were taken for over a hundred with dozens more
optioned, the contracts were soon cancelled.
By 1976 only four nations remained as prospective buyers: Britain,
France, China, and Iran; the latter two never took up their orders and by the
time Concorde entered service, the US had cancelled their
supersonic project and the Soviet programme was soon to follow. Even without the
oil shocks of the 1970s and the more compelling economics of wide-bodied airliners
like the Boeing 747, there were problems, the noise of the sonic boom as the speed of sound was
exceeded meaning it was impossible to secure agreement for it to operate over
land at supersonic speed. Accordingly,
most of its time was spent overflying the Atlantic and Pacific and BA and Air
France sometimes made profit from Concorde only because the British and French
governments wrote off the development costs.
Concorde was an extraordinary technical achievement but existed only
because the post-war years in the UK and France were characterised by national
projects undertaken by nationalised industries.
Under orthodox modern (post Reagan cum Thatcher) economics, such a thing
could never happen.

Concorde F-BTSC (Air France Flight 4590), Charles de Gaulle Airport, Paris, France, 25 July 2000.
On 25 July 2000, Air France Flight
4590, bound for New York, crashed on take-off out of Paris, killing all 109 on board and a further four on the ground. It was the only fatal accident
involving Concorde, the cause determined to be debris on the runway which
entered an engine, causing catastrophic damage.
In April 2003, both Air France and British Airways announced that they
would retire Concorde later that year citing low passenger numbers following
the crash, the slump in air travel following the 9/11 attacks and rising
maintenance costs.
Lindsay Lohan in The Parent Trap (1998)
Fictional works are usually constructed cognizant of physical reality and technological innovations have always influenced what's possible in plot-lines. The cell phone for example offered many possibilities but also rendered some situations either impossible or improbable (although
Hollywood has sometimes found either of those no obstacle in a screenplay). The retirement of Concorde also had to be noted. Not only had it long been used as a symbol of wealth but there was also the speed so plot-lines which included the relativities of the duration of commercial supersonic versus subsonic trans-Atlantic travel were suddenly no loner possible. Lindsay Lohan's line in
The Parent Trap (1998) since 2003 (and for the foreseeable future) is a "
stranded relic" of the Concorde era.

Tupolev Tu-144 (NATO reporting name:
Charger).
The Tu-144 was the USSR’s SST and it was the first to fly, its maiden
flight in 1968 some months before Concorde and sixteen were built. It was also usually ahead of the Anglo-French
development, attaining supersonic speed twelve weeks earlier and entering commercial
service in 1975 but safety and reliability concerns doomed the project and its
reputation never recovered from the 1973 crash.
The Soviet carrier Aeroflot introduced a regular Moscow-Almaty service
but only a few dozen flights were ever completed, the Tu-144 withdrawn after a
second crash in 1978 after which it was used only for cargo until 1983 when the
remaining fleet was grounded. It was
later used to train Soviet cosmonauts and had a curious post-cold war career
when chartered by NASA for high-altitude research. The final flight was in 1999.
Boeing 2707.
While perfecting supersonic military aircraft
during the early 1950s, Americans had explored the idea of SSTs as passenger
aircraft and had concluded that while it was technically possible, in economic
terms such a thing could never be made to work and that four-engined jets
like the Boeing 707 and Douglas DC8 were the future of commercial aviation. However, the announcement of the development
of Concorde and the Soviet SST stirred the Kennedy White House into funding
what was essentially a vanity project proving the technical superiority of US
science and engineering. Boeing won the
competition to design an SST and, despite also working on the 747 and the space
programme, it gained a high priority and the 2707 was projected to be the biggest,
fastest and most advanced of all the SSTs, seating up to three-hundred, cruising
at Mach 3 and configured with a swing-wing.
Cost, complexity and weight doomed that last feature and the design was
revised to use a conventional delta shape. But, however advanced US engineering and science might have been, US accountancy
was better still and what was clearly an financially unviable programme was in
1971 cancelled even before the two prototypes had been completed.

Lockheed L-2000.
Lockheed also entered the government-funded
competition to design a US SST. Similar to
the Boeing concept in size, speed and duration, it eschewed the swing-wing
because, despite the aerodynamic advantages, the engineers concluded what
Boeing would eventually admit: that the weight, cost and complexity acceptable
in military airframes, couldn’t be justified in a civilian aircraft. As the military-industrial complex well knew, the Pentagon was always more sanguine about spending other people's money (OPM) than those people were about parting with their own. Lockheed instead used a slightly different
compromise: the compound delta. After
the competition, Boeing and Lockheed were both selected to continue to the
prototype stage but in 1966 Boeing’s swing-wing design was preferred because
its performance was in most aspects superior and it was quieter; that it was going
to be more expensive to produce wasn’t enough to sway the government, things
being different in the 1960s. Reality finally bit in 1971.

Depiction of a Boom Overture in United Airlines livery.
In mid-2021 US carrier United Airlines (UA) announced plans to acquire a fleet of fifteen new supersonic airliners which
they expected to be in service by 2029. It
wasn’t clear from the press release what was the most ambitious aspect of the
programme: (1) that Colorado-based Boom (which at the time had not achieved supersonic flight), would be able by 2029 to produce
even one machine certified by regulatory authorities for use in commercial aviation, (2) that the aircraft would be delivered at close to the budgeted US$200
million unit cost, (3) that what United describe as “improvements in aircraft
design since Concorde” will eliminate, reduce or mitigate (all three have at various times been suggested) the effects of the sonic boom, (4) that it won’t
be “any louder than other modern passenger jets while taking off, flying over
land and landing”, (5) that sufficient passengers will be prepared to pay a
premium to fly at Mach 1.7 in a new and unproven airframe built by a company
with no record in the industry or that (6) Greta Thunberg (b 2003) will believe Boom
which says Overture will operate as a "net-zero carbon
aircraft".

Looking sceptical: Greta Thunberg.
The suggestion was the Overture will
run on "posh biodiesel", made from anything from waste cooking fat to
specially grown high-energy crops although whether this industry can by 2029 be
scaled-up to produce what will be required to service enough of the aviation industry
to make either project viable isn’t known.
Still, if not, Boom claimed "power-to-liquid" processes by
which renewable energy such as solar or wind power is used to produce liquid
fuel will make up any shortfall.
Boom does seem a heroic operation: they expect the Overture to be
profitable for airlines even if tickets are sold for the same price as a standard
business-class ticket. One way or another, the flight-path (figuratively and literally) of the Boom Overture follows is going to become a standard case-study in university departments although whether that's in marketing, engineering or accountancy might depend matters beyond Boom's control.
Boom XB-1 in subsonic flight.
Boom’s
progress can’t however be denied because on 10 February, 2025, its XB-1 “proof
of concept” test platform accomplished what orthodox physics once deemed
impossible. On that day if flew over
California’s Mojave Desert at speeds beyond the sound barrier without
generating a sonic boom, the announcement surprising some sceptics but doing
little to quell the doubts among analysts unable to build models which show a
sustained profitable life for the project.
What Boom did with the XB-1 was use an implementation of “Mach cut-off” technology
which exploits atmospheric conditions by manipulation, redirecting shock waves
upward rather than toward the ground. This is achieved by operating the airframe in
a certain four-dimensional envelope (a window created by specific atmospheric conditions
within a certain height range up to a certain speed). Flying within these parameters, the airframe minimizes
the unwanted effects of pressure waves, dispersing them without forming the
concentrated pressure front that creates the dreaded sonic booms. Whatever the sceptical economic modelers may
conclude, it was an impressive display of Boom’s technology and engineering
with the ground-level impact eliminated, at least in the ideal, controlled conditions
of a test flight.

What the economists noted was the XB-1
was able to achieve the much vaunted “silent-supersonic” at around 1,200 km/h
(750 mph) and the math indicates the means to implement Mach cut-off when
travelling faster (certainly the 2,100 km/h (1300 mph; Mach 1.7) which apparently
remains Boom’s target) doesn’t yet exist, even at the level of theory. On land, sea or air, for centuries what has
determined commercial viability is the speed-cost trade-off and notional
profitability was for at least some of Concorde’s years of operation achieved because
it offered a quicker trans-Atlantic flight-time (typically the Concorde at Mach
2.04 (1,350 mph, 2,180 km/h) would take 3 hours 30 minutes while at Mach 0.85 (565
mph, 910 km/h), a Boeing 747 would need 7-8 hours). In truth that profitability was a fudge subsidized
by taxpayers (a remarkably common phenomenon in modern capitalism) because the
French & British governments “wrote off” the development costs (some Stg £1.3
billion by the late 1970s at a time when a billion pounds was still a lot of
money and even that may have been a deliberate under-estimate to conceal the
true cost which has been estimated (in 2023 Sterling value terms) as high as Stg£21
billion).

Boom XB-1
taking off.
Rich customers or those with tickets paid for by OPM (other people’s
money) were prepared to pay the significant premium charged for a seat on
Concorde just to avoid sitting an additional 4-5 hours on a wide-bodied
subsonic aircraft and that’s the market Boom is interested in for a
trans-continental (New York City (NYC) to Los Angeles (LA)) US service. Subsonic flight times on the NYC-LA route are
typically 5-6 hours while Boom will be able to achieve that in under two hours
if their silent subsonic plans can be realized; that would mean the road
transport components of a trip elements to and from the NYC & LA airports
could be longer than the time in the air.
If able to offer a 3-4 hour reduction in NYC-LA travel time, genuinely
that’s a marketing advantage but one which can be leveraged only if there are
enough customers willing (with the required frequency) to spend somebody’s
money to fill the seats of UA’s 15 silentsonics. If, as Boom once indicated to venture capitalists
(VC) and others (JAL (Japan Airlines has reportedly invested US$10 million),
the tickets on the NYC-LA route would retail at around the subsonic
business-class level, then few doubt their model will work but it remains to be
seen whether what’s necessary can be achieved (1) by 2029 or (2) ever. Hopefully, Boom does succeed so delta-winged
supersonics can make a (quieter) return to the skies though it’ll be a shame if the marketing department
insisted on changing the corporate name to something like “Boomless”, “No Boom”,
“Boom-Free” or whatever. “Boom” is a really
good name for an aviation outfit has some history in the field, “Boom” the nickname
of Marshal of the Royal Air Force Hugh Trenchard (First Viscount Trenchard,
1873–1956) who was instrumental in the formation of Britain’s RAF (Royal Air
Force) although he gained the moniker because of the tone of his voice rather
than anything to do with fluid dynamics.