Why Do Airplanes Never Fly Faster Than 590 Miles Per Hour? The Reason Is Terrifying.

Added: 2026-05-10

[00:00:00]For more than 50 years, practically every commercial airplane on the planet has been stuck at the same speed. It doesn't matter whether you're inside a gigantic Airbus crossing the Atlantic or a modern Boeing leaving Brazil for Europe. At some point during the flight, the aircraft almost always stabilizes around 560 to 590 mph. And that's where a question appears that seems simple, but whose answer is far more disturbing than you might imagine. Humanity created rockets that travel through space, military fighter jets capable of exceeding 2,000 mph, even cars that challenge absurd speed records in the desert. Yet, you still take almost the same amount of time your parents did decades ago to cross an ocean inside a commercial airplane. Why?

[00:00:46]The answer involves airplanes tearing themselves apart in midair, pilots losing control of machines at 35,000 ft, and one specific night over the Atlantic when everything modern engineering had built was almost not enough.

[00:01:01]The problem doesn't start with the engines. [music] In fact, many modern airplanes have enough power to push tons of metal far beyond 590 mph.

[00:01:10]The real problem begins when something invisible completely changes, the air itself. The faster an airplane flies, the less the sky behaves like empty space, and the more [music] it starts acting like a gigantic physical barrier.

[00:01:24]And near 620 mph, engineers [music] enter an extremely dangerous zone where tiny can cause violent vibrations, loss of control, and forces capable of destroying parts of the aircraft without any visible warning. But, that still wasn't the most frightening part. For decades, pilots and engineers discovered that the true limit of airplanes wasn't fuel or engines. It was the invisible laws of the atmosphere itself. And the problem started appearing in a completely unexpected way.

[00:01:55]When perfectly normal aircraft suddenly began behaving like uncontrollable machines in the middle of the sky.

[00:02:03]Back in the 1940s, while the world celebrated the birth of the first jet airplanes, test pilots began reporting something that sounded impossible.

[00:02:12]At certain speeds, the aircraft simply stopped obeying. Some airplanes shook violently in the air. Others suddenly dove downward, even while the pilot pulled back on the control stick with all their strength. And in several cases, the entire machine seemed to collapse seconds before reaching the speed of sound. The scariest part was that nobody understood why.

[00:02:34]To many pilots of that era, it felt as if the sky itself was trying to stop airplanes from accelerating any further.

[00:02:40]The answer was happening in something nobody could see. As the airplane accelerates, the air flowing over the wings accelerates, too.

[00:02:49]But some parts of that air flow can exceed the speed of sound before the airplane itself ever gets there. And that's exactly where one of aviation's most dangerous phenomena is born. Shock waves.

[00:03:01]Suddenly, the air stops flowing smoothly and begins compressing violently around the aircraft.

[00:03:07]Drag increases dramatically, violent vibrations appear, and important parts of the airplane start losing efficiency almost simultaneously. Engineers gave this moment a name that still dominates modern aviation today.

[00:03:20]Critical Mach.

[00:03:21]It's the point where the airplane approaches extremely unstable behavior.

[00:03:26]And it was while trying to break through this invisible barrier that pilots discovered something even more sinister.

[00:03:32]At certain speeds, the airplane's controls could literally react opposite to what was expected. During one of the most dangerous tests in aviation history, a pilot kept accelerating his jet further and further, trying to discover how far the machine could go.

[00:03:47]Everything seemed normal until the moment the aircraft crossed a certain speed and began acting as if it had a mind of its own.

[00:03:55]The pilot pulled back on the controls to raise the nose of the aircraft. The airplane dove even faster toward the ground.

[00:04:02]In that instant, he realized he was no longer fighting gravity alone.

[00:04:06]He was fighting the air itself.

[00:04:08]Engineers later discovered that the shock waves were completely changing the behavior of the wings.

[00:04:13]Air flow no longer moved smoothly across the control surfaces and instead slammed into the aircraft with violent irregular impacts. It was like trying to drive a car while invisible gusts shoved every part of the steering system in different directions at the same time.

[00:04:30]Some airplanes vibrated so violently that pilots could barely read their instruments. Others had their controls freeze during flight.

[00:04:38]Many test pilots died before the industry understood what was truly happening.

[00:04:43]Out of that crisis came one of the most famous features of modern airplanes, swept wings.

[00:04:49]That aggressive look seen on commercial jets doesn't exist just for aesthetics.

[00:04:54]The design helps trick the air flow and delay the formation of those dangerous shock waves. It worked to a certain point, because even with modern wings, gigantic engines, and advanced computers, there was still a much worse problem waiting for engineers at high altitudes. An invisible problem that started destroying airplanes from the inside without anyone noticing.

[00:05:16]In the early 1950s, aviation believed it had finally entered the future.

[00:05:22]The de Havilland Comet was quiet, fast, and flew much higher than airplanes from the previous generation. To passengers at the time, it felt like the impossible was happening.

[00:05:32]But there was one terrifying detail nobody could see.

[00:05:36]With every flight, that airplane was slowly being destroyed from the inside.

[00:05:40]Some aircraft simply exploded in midair without any clear warning.

[00:05:45]In one of the most shocking accidents, debris fell into the Mediterranean Sea just minutes after the flight reached cruising altitude. The mystery was so bizarre that engineers built an enormous testing tank to recreate flight conditions, repeatedly pressurizing the entire body of the airplane, simulating thousands of takeoffs and landings. And that's when something terrifying appeared. Tiny, invisible cracks began forming in the fuselage, especially near the square windows. Internal pressure caused the airplane to constantly expand and contract, like a balloon being inflated several times a day.

[00:06:21]Eventually, the metal simply could not handle it anymore.

[00:06:25]That discovery completely changed aircraft engineering.

[00:06:29]The rounded windows we see on airplanes today exist specifically to distribute stress more evenly across the fuselage and prevent dangerous concentrations of pressure. But, the accident revealed something even more alarming.

[00:06:42]Even while flying below the speed of sound, airplanes were already extremely close to delicate limits. And the higher they flew, the smaller the margin became between a stable flight and a disaster impossible to correct in time.

[00:06:57]At 36,000 ft, a commercial airplane appears to be peacefully gliding through the sky.

[00:07:03]Passengers sleep, watch movies, walk through the aisle. But, outside, the situation is far more delicate than it seems. At that altitude, the air is so thin that the wings must maintain a very specific minimum speed to keep generating lift.

[00:07:18]Slow down too much, and the airplane loses the ability to fly.

[00:07:23]Speed up too much, and it starts entering the shockwave region. Between those two extremes exists an extremely [music] narrow safety zone.

[00:07:31]Pilots call it the coffin corner. It's like crossing a suspended bridge in the sky with less than 3 ft of room on either side.

[00:07:39]In In aircraft, computers constantly help maintain that balance.

[00:07:44]But what happens when those computers stop trusting their own sensors? The answer to that question cost 228 lives.

[00:07:52]It was the early morning of June 1st, 2009.

[00:07:55]Air France flight 447 departed Rio de Janeiro bound for Paris carrying 216 passengers and 12 crew members.

[00:08:04]Most were asleep when the airplane crossed a storm region over the Atlantic. Outside, temperatures were nearly -76° Fahrenheit. The external speed sensors, the pitot tubes, began freezing.

[00:08:17]Within seconds, [music] the airplane's systems started receiving contradictory information.

[00:08:22]One reading said the airplane was too slow.

[00:08:25]Another said it was too fast. The autopilot, unable to determine which one to trust, simply disconnected. Suddenly, three pilots found themselves over the middle of the Atlantic, nearly 36,000 ft above the ocean, in darkness, inside a storm, uncertain of the aircraft's real speed.

[00:08:44]>> [music] >> Confused, the copilot pulled back on the controls, instinctively trying to climb.

[00:08:49]It was the fatal mistake.

[00:08:52]The airplane entered a stall. The wings stopped generating lift.

[00:08:56]The aircraft began falling vertically like a stone at more than 110 mph toward the ocean. The pilots had less than 4 minutes to understand what was happening and reverse the situation. They couldn't.

[00:09:08]The Airbus A330 struck the Atlantic at 2:14 in the morning.

[00:09:13]The black boxes took almost 2 years to recover from the ocean floor. What investigators found was disturbing.

[00:09:19][music] During much of the fall, the airplane was still technically recoverable. The pilots [music] simply failed to recognize what was happening.

[00:09:28]Because no training had prepared them to face that specific combination of failures in the Atlantic's coffin corner. The tragedy of AF447 revealed something few people had imagined.

[00:09:39]>> [music] >> Even in the most advanced airplanes on Earth, flying near the limits of the atmosphere still requires an extremely fragile balance. And any combination of factors that destroys that balance can become lethal within minutes.

[00:09:53]While engineers fought against aviation's physical limits, another group tried to simply ignore them.

[00:09:58]>> [music] >> The idea seemed logical.

[00:10:00]If military jets could already exceed the speed of sound, why not create a commercial airplane capable of doing the same?

[00:10:07]And that's how the Concorde was born.

[00:10:09]While ordinary airplanes crossed the ocean in 7 or 8 hours, the Concorde did the same trip in little more than three.

[00:10:17]>> [snorts] >> Passengers left Europe and arrived in the United States before the time they would have landed on a conventional flight. It felt like the definitive beginning of the future. But flying at more than 1,300 mph transformed the airplane into something completely different.

[00:10:33]Friction with the air became so intense that the nose reached temperatures above 248° Fahrenheit. The heat caused the entire body of the aircraft to expand.

[00:10:43]On long flights, the Concorde could literally become several inches longer while crossing the Atlantic [music] and had to be built with that in mind.

[00:10:52]But the real problem was something else.

[00:10:54]The Concorde burned fuel at an absurd rate.

[00:10:58]Carrying just over 100 passengers consumed a wildly disproportionate amount of energy compared to ordinary airplanes. Tickets were extremely expensive, maintenance cost fortunes, and the economics simply never worked.

[00:11:11]And there was still another problem that no engineer could solve.

[00:11:15]Whenever the Concorde crossed the sky, thousands of people on the ground heard a sound like an explosion appearing out of nowhere.

[00:11:22]Windows rattled, doors shook, residents ran outside. It wasn't a bomb. It was the airplane moving through the sky too fast. Above the speed of sound, the aircraft begins outrunning its own sound waves. The air ahead can no longer move out of the way smoothly and instead becomes violently compressed, forming a gigantic shockwave that travels to the ground like a continuous aerial explosion. The famous sonic boom could be heard dozens of miles away. The problem became so serious that several countries banned supersonic flights over populated areas. And then an almost absurd situation appeared. Even if engineers solved the fuel, temperature, and safety problems, there was still one barrier engineering alone could not break. People simply refused to live under explosions coming from the sky every day.

[00:12:13]The Concorde was retired in 2003.

[00:12:16]The dream of commercial supersonic travel died, at least for a few decades.

[00:12:22]While the public imagined airplanes becoming faster and faster, the world's largest manufacturers moved in the opposite direction.

[00:12:29]Instead of chasing speed, Boeing and Airbus started competing for something far more valuable, efficiency.

[00:12:36]>> [music] >> And there's a brutal reason behind that choice. As an airplane approaches the speed of sound, air resistance does not grow linearly.

[00:12:44]>> [music] >> It explodes.

[00:12:46]Fuel consumption can skyrocket disproportionately just to gain a few minutes of advantage. That's exactly what killed ambitious projects like the Boeing Sonic Cruiser. An aircraft capable of flying near supersonic speeds that was canceled once airlines realized saving fuel was worth far more money than saving time. That's when the gigantic modern turbofan engines appeared, created not for extreme speed, but to move enormous amounts of air efficiently and quietly. And in the end, the entire industry reached the same conclusion.

[00:13:18]Flying around 560 to 590 mph was the perfect balance between speed, safety, comfort, and operating cost.

[00:13:28]That was the limit. Permanent, definitive, or at least that's what everyone believed.

[00:13:34]Behind the scenes of aerospace engineering, some companies never accepted that limit.

[00:13:39]The main obstacle had always been the sonic boom, but instead of trying to eliminate the shock wave, engineers started thinking differently.

[00:13:47]What if it were possible to control how it spreads? That's exactly what NASA's X-59 QueSST project is trying to do.

[00:13:55]The aircraft has an extremely long nose, a narrow shape, and lines that look strange precisely because every millimeter was designed to manipulate airflow behavior. The goal is to transform that explosive boom into a distant muffled sound.

[00:14:10]Something more like a faraway door slam.

[00:14:13]If it works, the biggest legal barrier against commercial supersonic flight could disappear. And while NASA tests silence, companies like Boom Supersonic are building aircraft intended to cross oceans in less than half the current travel time, but now focused on efficiency, lower operating costs, and sustainable fuel.

[00:14:33]Something the Concord never had.

[00:14:35]Quietly, we are at the beginning of a new air race.

[00:14:39]Today, more than 100,000 flights cross the skies every single day. And even with artificial intelligence, advanced materials, and incredibly powerful engines, almost all of them remain trapped in the same speed range from decades ago.

[00:14:53]But now you know why.

[00:14:55]The real enemy was never a lack of power. It was the atmosphere itself.

[00:15:00]Near the speed of sound, everything starts demanding a price at the same time.

[00:15:05]The air stops cooperating, heat rises violently, fuel consumption explodes, noise becomes a political problem, and even tiny mistakes become disasters within seconds. It's as if physics itself created a border separating efficient flight from aerodynamic chaos.

[00:15:22]And the most disturbing part is what AF447 revealed.

[00:15:27]Even when an airplane is technically inside that safe limit, a chain of small failures, frozen sensors, confused pilots, seconds of hesitation, can be enough for physics to demand the full price all at once.

[00:15:41]Every time a jet weighing hundreds of tons crosses the ocean while people sleep peacefully at nearly 600 mph, it is operating far closer to the limits of physics than any of those passengers realize. And now, for the first time in decades, engineers are trying to push those limits again. NASA's X-59 is expected to begin flying over American cities soon.

[00:16:04]If the sonic boom truly becomes a distant murmur, legal restrictions may disappear.

[00:16:10]And if they do, commercial supersonic airplanes will return.

[00:16:14]This time, for good. If that happens, future generations will look at today's airplanes the same way we now look at old wooden biplanes.

[00:16:23]The question is no longer whether this limit will be broken.

[00:16:27]The question is when.

[00:16:28]And whether we'll still be alive to see it happen. If you made it this far, [music] you now know more about the limits of flight than most people on the planet.

[00:16:37]Enjoy videos about engineering, technology, [music] and the hidden secrets behind humanity's greatest creations? Subscribe to the channel. Because the next videos will make you question things you thought you already understood.