Why Wendover Gets Concorde's Death Wrong — And Misstates How Modern Jet Engines Work
Wendover Productions makes a convincing case that commercial aviation has chosen economy over speed. Its explanation of Concorde, however, is considerably less convincing. The video turns a complicated industrial, political and commercial failure into a tidy story about expensive fuel, empty seats and passengers discovering comfortable beds.
There is a much more revealing story underneath. Concorde was constrained by government decisions, international aviation restrictions, a catastrophic accident, the collapse of premium travel demand and a manufacturer whose willingness to maintain the aircraft was running out. Even its engine explanation contains a significant technical error.
The central economic argument survives scrutiny: Concorde was exceptionally expensive to operate, and conventional airlines have powerful reasons to prioritize fuel efficiency. But that does not excuse presenting an incomplete explanation as the whole story.
The engine explanation gets the direction of thrust wrong
The video's explanation of turbofan engines contains a particularly consequential mistake.
It states:
"The majority of the thrust comes from the air that passes through the turbine."
That reverses the defining advantage of a modern high-bypass turbofan.
In engines such as those powering the Boeing 787, the large front fan accelerates bypass air around the engine core. That bypass airflow produces the majority of the thrust in modern high-bypass designs. The engine core's essential role is to generate the energy that drives the fan.
GE Aerospace engineer Ted Ingling explains the distinction directly: the vast majority of thrust comes from the front fan, while the core's principal function is to drive it. The FAA's Pilot's Handbook of Aeronautical Knowledge likewise explains that bypass airflow generates additional thrust and improves fuel efficiency. GE Aerospace · FAA handbook.
GE Aerospace News+1
This is not a minor distinction. The entire explanation of bypass ratios depends on understanding why accelerating a large mass of air relatively gently can produce efficient propulsion.
The video correctly explains that higher bypass ratios generally improve efficiency. Yet it then describes the source of most turbofan thrust incorrectly.
There is another numerical problem. Wendover assigns the GEnx engine a 10:1 bypass ratio while discussing both the Boeing 787 and 747-8. GE's published specifications distinguish the variants: the GEnx-1B used on the 787 has a higher bypass ratio than the GEnx-2B used on the 747-8, with GE's published takeoff figures around 9:1 and 8:1 respectively. GE Aerospace's GEnx specifications.
GE Aerospace News+1
The broad lesson about engine efficiency is sound. The technical explanation should be accurate enough to support it.
The speed-of-sound calculation mixes two different environments
Wendover identifies the speed of sound as approximately 767 mph, then calculates Mach 0.8 as approximately 613.8 mph. It presents this as the speed limit for commercially viable subsonic jets.
The problem is that Mach numbers describe speed relative to the local speed of sound, which changes with atmospheric temperature.
NASA identifies approximately 760 mph as the speed of sound at sea level. The FAA's 2023 pilot handbook gives a substantially different figure at 40,000 feet: 574 knots, approximately 660 mph.
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At that altitude, Mach 0.8 corresponds to approximately 528 mph, not 614 mph.
The distinction matters because commercial jets cruise at high altitude, not at sea level. The FAA places their normal cruise range around Mach 0.7–0.9.
Wendover's explanation of transonic drag is fundamentally correct: as aircraft approach the speed of sound, shock waves and aerodynamic resistance create serious efficiency and stability challenges. But presenting a sea-level conversion as a general commercial cruising-speed threshold makes the numerical conclusion misleading.
The physics deserves better than a calculation that changes atmospheric conditions halfway through the argument.
Concorde was not free to fly wherever passengers wanted
The video explains the aerodynamic difficulty of flying close to the speed of sound but overlooks a different problem: the noise Concorde created on the ground.
A sonic boom is a pressure wave generated by supersonic flight. It made governments reluctant to allow Concorde to fly supersonically over populated territory.
The United States prohibited civil supersonic flight over land from March 1973. Other countries imposed restrictions too. A Congressional Research Service report found that nearly half of Concorde's planned routes, particularly those crossing land, were prohibited. This restricted its commercial network to a relatively small number of routes, especially transatlantic services. FAA policy · Congressional Research Service.
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That matters enormously. An airline cannot build a profitable global network around an aircraft that cannot fly supersonically over much of the territory connecting its customers.
Only British Airways and Air France ordered Concorde. Of the 20 aircraft manufactured, 14 entered airline service; the remaining six were development and test aircraft. All other orders were cancelled.
Every CRS Report+1
Concorde was not simply an expensive aircraft competing against cheaper aircraft. It was an expensive aircraft with a restricted addressable market.
The 2000 crash and September 11 changed the commercial equation
Wendover devotes considerable attention to the development of lie-flat business-class seating. It gives much less attention to the events that devastated Concorde's customer base.
On July 25, 2000, Air France Flight 4590 crashed shortly after taking off from Paris. A tire struck a piece of metal debris from a departing DC-10, sending debris into Concorde's fuel tank and causing a fire. All 109 people aboard and four people on the ground died. The fleet was subsequently grounded while safety modifications were developed. French BEA investigation.
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The timing of Concorde's return was particularly unfortunate. The first regular passenger flight after the accident took place on September 11, 2001. The terrorist attacks that day triggered a severe contraction in international air travel, particularly premium travel.
British Airways' June 2003 financial statement described the damage in unusually clear terms:
- The airline was still experiencing the effects of September 11.
- A worldwide economic downturn was depressing demand.
- The approaching Iraq war further damaged confidence.
- SARS subsequently created another major shock to international travel.
- Concorde's North Atlantic service was reduced by 50%, as traditional customers stayed away or traded down.
BA concluded that there was little prospect of restoring profitability.
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These were not minor background events. They directly affected the customers willing and able to pay Concorde's extraordinary fares.
The French government's own figures make the deterioration measurable. Air France's average Concorde passenger load factor exceeded 62% in 1999 and 2000. After services resumed in November 2001, it averaged 50%, falling below 30% in March 2003.
Sénat
There is also an important qualification to the video's claim that fewer than one-third of seats held paying passengers. Passenger occupancy, paying occupancy and available seats are different measurements.
In April 2003, British Airways was selling tickets for only 50 of Concorde's 100 seats on many services. It had just two aircraft available for its daily schedule, while three others were undergoing work to install reinforced cockpit doors. The airline wanted conventional first-class seats available as replacements if a Concorde flight failed.
The Guardian
That does not mean demand was healthy. It means that a simple empty-seat calculation cannot explain what was happening.
The retirement was also a maintenance and manufacturer-support decision
The video presents Concorde's fuel consumption as the decisive economic weakness. It overlooks the substantial cost of keeping an ageing, technically unusual aircraft legally and operationally fit to fly.
British Airways' 2003 announcement followed an extensive technical review with Airbus. The manufacturer concluded that an enhanced maintenance programme would be necessary, while the airline faced declining passenger revenue.
The figures were substantial:
- Airbus estimated another £40 million in maintenance expenditure over the following two to five years.
- British Airways expected an £83 million accounting write-off when Concorde was retired.
- Approximately £47 million of that write-off was thought to relate to upgrades following the 2000 crash.
- The aircraft required avionics replacement, reinforced cockpit doors and further mandatory modifications.
These were not optional luxury improvements. They were expenses associated with maintaining the aircraft and meeting safety requirements.
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There was also a revealing disagreement over Airbus's role.
British Airways chairman Lord Marshall told The Times that BA might have continued operating Concorde if Airbus and Air France had been willing to share the additional maintenance burden. He said Airbus was unwilling to support the aircraft beyond October 2003 and would not transfer its airworthiness certification to another company.
Airbus's public position was that it respected the retirement decision and would support the operators through the final flight.
These accounts do not establish that Airbus alone killed Concorde. They do establish that continued operation depended on a manufacturer whose long-term support was no longer available on terms BA considered acceptable.
researchbriefings.files.parliament.uk
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That is a much more consequential part of the retirement story than the suggestion that passengers simply preferred a comfortable bed.
Taxpayers had already absorbed an enormous part of Concorde's cost
There is another missing distinction in the video's financial explanation: the difference between an aircraft's operating profitability and the total economic cost of developing it.
The British government spent £1.358 billion gross supporting Concorde, equivalent to £1.062 billion after receipts, in the prices of the period covered by the official figures.
In February 1979, a government review concluded that British Airways could not operate Concorde profitably by normal commercial accounting standards. The government consequently wrote off £160 million of public capital associated with acquiring the fleet, treating the aircraft and initial spare inventory as fully depreciated assets.
The government initially took 80% of any operating surplus, leaving BA with 20%. In April 1984, BA assumed responsibility for the British contribution to ongoing support and paid the government £16.5 million for spare parts and other arrangements.
researchbriefings.files.parliament.uk
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The distinction is important: this does not mean the government permanently paid BA's operating losses. It means the airline's commercial accounts did not carry the full cost of developing and acquiring the aircraft.
The Congressional Research Service makes the same distinction. It notes that BA and Air France sometimes reported profitable Concorde operations, but those calculations excluded development and capital costs absorbed by the two governments.
Every CRS Report
Concorde's operating economics were difficult enough without pretending that its development was financed by ordinary commercial investment.
The video compares fuel consumption and ticket prices but never explains this enormous transfer of development risk from airlines to taxpayers.
The lie-flat bed is not a sufficient explanation
Wendover's argument about luxury has some merit. British Airways introduced fully flat business-class seating in 2000, giving conventional passengers a much more comfortable way to cross the Atlantic overnight.
But the video presents this development as a major explanation for Concorde losing its appeal without establishing how much demand it actually diverted.
There is more direct evidence of what happened to Concorde's customers.
In April 2003, British Airways chief executive Rod Eddington explained that companies were tightening travel policies and removing Concorde from corporate travel arrangements. Financial institutions in London and New York were increasingly unwilling to pay the standard £6,800 return fare for executive travel.
The Guardian
That is a much more concrete commercial explanation than assuming passengers simply discovered that beds were comfortable.
Lie-flat seating was competition. Corporate spending restrictions, the post-crash recovery, September 11 and the wider economic downturn were documented commercial pressures.
The video turns a complicated change in the premium travel market into a convenient story about passengers choosing comfort over speed.
Faster aircraft can have economic value beyond saving passengers time
Wendover makes another sweeping statement:
"Speed really doesn’t matter to airlines."
Its calculation compares approximately $5,000 in aircraft acquisition cost per flight with more than $15,000 in fuel for a New York–London journey.
The calculation illustrates why fuel consumption matters. It does not establish that speed has no economic value.
A faster aircraft could potentially complete additional journeys over its operating life, increasing aircraft utilization and revenue-generating opportunities. The Congressional Research Service explicitly identifies this as the speed dividend of supersonic aircraft.
There is an important qualification: additional utilization only creates an advantage when passenger demand is sufficient and maintenance and ground turnaround times remain short.
Every CRS Report
That is precisely the analysis missing from the video.
Dividing an aircraft's list price by its rated flight cycles is a useful illustration of acquisition cost. It is not a complete comparison of aircraft economics, and it does not calculate the revenue an airline might generate through additional flights.
The defensible conclusion is narrower: fuel efficiency generally dominates the economics of conventional commercial aviation, while the commercial value of additional speed depends on the route, customer demand, operating costs and potential increase in utilization.
That is less memorable than saying speed does not matter. It is also more accurate.
The verdict: A good aviation lesson is not a complete history
Wendover gets several important things right. Concorde consumed enormous quantities of fuel, struggled to maintain consistently profitable passenger loads and faced competition from increasingly comfortable conventional aircraft.
But its retirement was not simply the result of passengers preferring beds and airlines preferring cheaper fuel.
The historical record describes a much more complicated failure: a government-funded development project with limited commercial buyers, a restricted route network, poor passenger economics, a catastrophic accident, a collapse in premium travel demand and escalating maintenance requirements.
The manufacturer's long-term support was another important part of the final decision.
The technical explanation also needs correction. The video reverses the principal source of thrust in modern high-bypass turbofans and uses a sea-level speed-of-sound conversion to establish a cruising-speed threshold at high altitude.
None of this proves that Concorde should have survived. Its commercial difficulties were real, and its retirement was economically understandable.
But explaining why something happened requires more than identifying its most visible weakness.
Concorde did not simply lose a race against cheaper tickets and better beds. It was an extraordinarily ambitious aircraft whose engineering, regulatory environment, operating economics and institutional support could not be sustained together.
The video explains why conventional airlines prefer efficiency. It does not adequately explain why Concorde died. And in trying to simplify the engineering, it gets an important part of that engineering wrong.
References
1. Why Planes Don't Fly Faster — Wendover Productions, original video. The primary source for the arguments, calculations and technical claims examined here.
2. Out of this world: GE Aviation engineer Ted Ingling — GE Aerospace, July 16, 2018. Explains why the front fan generates the vast majority of thrust in modern high-bypass turbofan engines.
3. GEnx Engine Specifications — GE Aerospace. Provides the different bypass ratios and technical specifications for the 787 and 747-8 engine variants.
4. Pilot's Handbook of Aeronautical Knowledge — Federal Aviation Administration, 2023. Establishes how Mach numbers, atmospheric temperature, altitude and transonic airflow affect aircraft performance.
5. Civil Supersonic Airplane Noise Type Certification Standards and Operating Rules — FAA, October 16, 2008. Documents the American prohibition on civil supersonic flight over land since 1973.
6. Supersonic Passenger Flights, R45404 — Congressional Research Service, November 14, 2018. Examines Concorde's development costs, route restrictions, passenger economics, government financing, retirement and the potential economic value of faster aircraft.
7. Accident to the Concorde registered F-BTSC — French Bureau of Enquiry and Analysis for Civil Aviation Safety, final report published January 16, 2002. Documents the technical sequence behind the 2000 crash.
8. Fréquentation des vols sur Concorde — French Senate, government response published July 10, 2003. Supplies official passenger load factors before and after Concorde returned to service, including the decline below 30% in March 2003.
9. British Airways 2002–2003 Summary Financial Statement — British Airways, June 2003. Documents the airline's financial conditions, the 50% reduction in North Atlantic Concorde services and the collapse in premium travel demand.
10. Aviation: Concorde — House of Commons Library, June 10, 2010. Provides historical government financing figures, BA's capital write-offs, maintenance arrangements, route restrictions and the competing accounts of Airbus's role in retirement.
11. Concorde's end will cost £83m — The Guardian, April 11, 2003. Reports the anticipated £40 million maintenance requirement, avionics replacement, cockpit modifications and the financial circumstances surrounding retirement.
12. BA caps Concorde ticket sales — The Guardian, April 5, 2003. Documents how aircraft availability and contingency arrangements led BA to withhold half the seats from sale on many services, complicating interpretations of passenger occupancy.