Nova Zhang
Breaking the sound barrier refers to an aircraft exceeding the speed of sound, which is around 760 miles per hour. The term sound barrier was coined during World War II when pilots of high-speed fighter jets experienced a range of adverse aerodynamic effects that seemed to prevent them from reaching supersonic speeds. The first person to break the sound barrier was Captain Chuck Yeager in 1947, and the first woman to achieve this feat was Jackie Cochran in 1953. When a plane breaks the sound barrier, it creates a sonic boom, which is a loud explosion-like noise caused by a sudden change in pressure as the aircraft outruns its own pressure and sound waves. While people on the ground can hear this boom, those inside the aircraft cannot, as the sonic boom doesn't catch up to them.
| Characteristics | Values |
|---|---|
| Speed required to break the sound barrier | 760-770 miles per hour |
| First plane to break the sound barrier | Bell X-1 |
| First person to break the sound barrier | Capt. Chuck Yeager |
| Date sound barrier was first broken | October 14, 1947 |
| Speed of Bell X-1 | 767 mph |
| Speed of sound at 20°C | 343 metres per second |
| Speed of sound at 22°C | 345 metres per second |
| Speed of sound at 54000 feet | 295 meters per second |
| First woman to break the sound barrier | Jackie Cochran |
| Date Jackie Cochran broke the sound barrier | May 18, 1953 |
| First woman in Congress to break the sound barrier | Margaret Chase Smith |
| Date Margaret Chase Smith broke the sound barrier | December 3, 1957 |
| Jet that broke the sound barrier in Washington | D.C. Air National Guard F-16 fighter jet |
| Jet that broke the sound barrier over Long Island | F-16 Fighting Falcon |
Explore related products
What You'll Learn
The first plane to break the sound barrier
The sound barrier refers to the large increase in aerodynamic drag and other undesirable effects experienced by an aircraft or other object when it approaches the speed of sound. The speed of sound is about 767 mph at sea level. When aircraft first approached the speed of sound, these effects were seen as constituting a barrier, making faster speeds very difficult or impossible.
The Bell X-1's achievement demonstrated that safe flight at the speed of sound was achievable in purpose-designed aircraft, paving the way for future supersonic flight. The data gathered during the X-1 program was crucial for the development of new generations of high-performance combat aircraft, such as the North American F-100, America's first supersonic fighter.
Jackie Cochran became the first woman to break the sound barrier on May 18, 1953, piloting a plane borrowed from the Royal Canadian Air Force, with Yeager accompanying her. On December 3, 1957, Margaret Chase Smith became the first woman in Congress to break the sound barrier as a passenger in an F-100 Super Sabre piloted by Air Force Major Clyde Good.
Trumpets Sound: When Will the End Times Begin?
You may want to see also
Explore related products
What is a sonic boom?
A sonic boom is a loud sound, similar to an explosion, a crack of thunder, or a crack of a bullwhip. It is caused by an object moving faster than the speed of sound, which is about 750 miles per hour at sea level. The speed of sound varies with altitude and temperature; at an altitude of about 20,000 feet, where the atmosphere is thinner and colder, sound travels at about 660 miles per hour.
When an object moves through the air, it creates pressure waves in front of and behind it. These waves travel at the speed of sound. As the object approaches the speed of sound, the waves pile up on each other, compressing the air and creating a shock wave. This shock wave is the sonic boom.
The sonic boom can be very loud and may cause minor damage to some structures, such as shattering glass. It is continuous as long as the object is supersonic and fills out a narrow path on the ground following the object's flight path, known as the "boom carpet". The width of the boom carpet depends on the altitude of the object. The sonic boom is also affected by the size and shape of the object, with larger supersonic aircraft creating particularly loud booms.
Anything exceeding the speed of sound can create a sonic boom, including airplanes, bullets, and the tip of a bullwhip. However, people inside a supersonic aircraft do not hear the sonic boom they create. They can see the pressure waves around the plane, but they do not hear the boom itself.
How Wind Screens Alter Microphone Audio
You may want to see also
Explore related products
Why can't planes break the sound barrier over land?
The sound barrier refers to 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 an aircraft breaks the sound barrier, it produces a "sonic boom". This pressure change can be quite damaging and has been known to break windows in buildings.
To prevent panic among unsuspecting residents on the ground and damage to the community, planes are rarely allowed to break the sound barrier over land. Military pilots are allowed to break the sound barrier in a limited number of scenarios: over the ocean, on a training range where it won't disrupt everyday life, or in an emergency with a superior's approval. For example, in an emergency, pilots can break the sound barrier to intercept an unresponsive aircraft, giving them more time to assess whether it is a threat.
Even Concorde, which routinely flew at supersonic speeds, had land overflight restrictions. While Concorde could fly supersonic over land, it usually did so at a higher altitude than airliners, between 40,000 and 60,000 feet.
Factors Influencing Speed of Sound
You may want to see also
Explore related products
![Oasis: Supersonic [Blu-ray + Digital HD]](https://m.media-amazon.com/images/I/918kvYMdJIL._AC_UY218_.jpg)
Can pilots and passengers hear the sonic boom?
Sonic booms are impulsive noises similar to thunder, caused by objects moving faster than sound. The speed of sound varies with temperature and air density, increasing by about 0.6 m/s for every degree Celsius increase in temperature. At 68°F (20°C), the speed of sound is about 767 mph at sea level. When an aircraft travels faster than sound, it creates a sonic boom.
The sound of a sonic boom depends on the distance between the observer and the aircraft. It is usually heard as a deep double "boom" as the aircraft is typically some distance away. The sound is akin to that of mortar bombs used in firework displays. It is a common misconception that only one boom is generated when an object transitions from subsonic to supersonic speeds. In reality, the boom is continuous throughout the supersonic flight, affecting only observers positioned within a specific geometrical cone behind the object.
People on the ground can hear the sonic boom of supersonic aircraft, and it can be loud and sometimes painful. However, pilots and passengers on board typically do not hear the sonic boom created by their own aircraft. This is because they are at the head of the Mach cone, moving faster than the sonic boom itself. While they cannot hear sounds from outside the aircraft, pilots and passengers can hear sounds transmitted through the air inside the plane, such as the humming of the engines.
In certain cases, individuals on board an aircraft have reported hearing a sonic boom. For example, in 1979, a passenger recalled hearing a loud boom while flying from Chicago to Cologne, Germany, with the pilot announcing that they would be breaking the sound barrier. This experience has been attributed to the supersonic capabilities of the Concorde, which could have been the aircraft involved in this particular flight.
What's Behind Those Crackling Lungs?
You may want to see also
Explore related products
What does breaking the sound barrier look like?
Breaking the sound barrier refers to an aircraft or object exceeding the speed of sound, which is approximately 770 mph or 1,239 km/h at sea level. The speed of sound varies with temperature and air density, increasing by about 0.6 m/s for every degree Celsius increase in temperature. At 68°F (20°C), the speed of sound is approximately 767 mph or 1,234 km/h.
When an aircraft approaches the speed of sound, it experiences a significant increase in aerodynamic drag, which can make faster speeds difficult or impossible. This increase in drag is sudden and large, and it tends to act as a "barrier" to further acceleration. As the aircraft exceeds the speed of sound, it creates a sonic boom, a loud booming sound caused by the build-up of sound wave energy in front of the aircraft. This sound wave then passes by the observer, creating the sonic boom. While you cannot see a sonic boom with the naked eye, specialized imaging technology, such as Schlieren imaging, can capture it. However, you may be able to observe a "vapor cone" or "shock collar," which is the condensation that appears behind an aircraft as it approaches Mach 1, especially in humid conditions over water.
The sound barrier was first broken by Captain Chuck Yeager on October 14, 1947, when he flew a small, rocket-like plane called the Bell X-1. Yeager's successful flight challenged the commonly held belief that exceeding the speed of sound would destroy an aircraft. Since then, several other notable individuals have broken the sound barrier, including Jackie Cochran, who became the first woman to achieve this feat on May 18, 1953.
Breaking the sound barrier is not limited to aircraft; bullets, cannonballs, and even the tip of a bullwhip can exceed the speed of sound and create a sonic boom. Additionally, rocketry and artillery experts have routinely achieved supersonic speeds with their products.
Vinyl Records: Superior Sound Quality or Nostalgia?
You may want to see also
Frequently asked questions
The sound barrier is the sudden increase in aerodynamic drag that occurs when an object approaches the speed of sound, also known as Mach 1. It is caused by the formation of shock waves and pressure changes around the object.
When a plane exceeds the speed of sound, it is said to have broken the sound barrier. This results in a sonic boom, an impulsive noise similar to thunder, caused by the pressure changes and shock waves created by the plane's movement.
The speed of sound varies depending on factors such as temperature and altitude. At sea level, it is approximately 767-770 mph or 1,234-1,239 km/h.
On October 14, 1947, US Air Force Captain Chuck Yeager officially broke the sound barrier in the Bell X-1 rocket plane, proving it could be done without injury or harm to passengers.
