Break the mystery around the sound barrier image

The moment a fighter plane created a cone from steam, when it gradually reached supersonic speed, it was recorded by photographers in many impressive photographs. This is not the time when the plane breaks the sound, as many people think.

Daily Mail quoted Darek Siusta, an aerial photographer, as saying the hat was formed because the aircraft moved at high speed, causing a change in pressure and causing the steam in the air to condense around its body. This image is often said to appear when the aircraft overcame sound. In fact, it took place before the plane overcame the sound, though always accompanied by a loud sound.

Fighters create a hat from steam.(Source: Solent News)

Just like a steam cone, a sonic boom also appears due to aircraft operation. When the plane moves, it creates many pressure waves in front and behind the body, similar to the nose and tail waves a ship makes when operating underwater. These waves have the same speed as the sound (1,225km / h). When the aircraft speeds up beyond sound, the pressure waves behind it will be pushed forward, which has a slower speed. Gradually they formed a large shockwave, moving in the air at high speed.

The people standing on the ground when the plane flew at supersonic speeds would often hear a loud bang to be stunned, accompanied by shockwaves hitting the body. It is rumored that the sound of the explosion only appears once when the aircraft first broke the sound. In fact, that's not the case, the sound of an explosion will appear continuously and people will still hear it if standing in front of the sound barrier.

Darek Siusta is a person who has a lot of experience taking photos of aircraft moving ultrasound. In order to have an impressive photo set published in the Daily Mail, this man went to the Oceana Air Show in Virginia Beach, Virginia. He uses the Nikkor 500mm f4 VRII focal length lens, mounted on the Nikon D4 body to record the screen beyond the sound of the aircraft.

When the US Navy F-18 Super Hornet glided at 1,225 km / h and generated many shock waves in the air, Siusta recorded its image with an aperture of f4, shutter speed. 1 / 4,000 and ISO 100 for smooth, high quality photos. He said that all his photos were recorded in less than 1 second.