There are nights when the sky is clear and cloudless, and you look up and see countless sparkling lights, some of which are moving. What are they?
China Commercial Aircraft Corporation (Comac) allowed viewers to freely visit the two aircraft C919 and ARJ21-700 parked at Van Don airport (Quang Ninh).
The higher the flight, the more fuel-efficient the aircraft is, the faster and quieter it flies. But they can't fly into space because of some design limitations.
Video footage of Airbus A380 aircraft, one of the largest passenger aircraft currently landing in reverse wind conditions and shaking violently due to the impact of the storm.
NASA's X-59 passenger supersonic aircraft was designed to fly at 1,700 km / h, nearly 1.4 times the speed of sound.
This is a breakthrough in the design of traditional turboprop engines, which are very popular in today's aviation industry.
NASA's supersonic airplanes have lower noise levels than the Concorde, which can be tested by 2019.
If successful, this special aircraft will conquer every record of previous altitude.
Cheap airplanes with twice the speed of sound will take off for the first time in a test flight later this year.
Airlander, which is more than 91 meters long, holds enough helium gas to fill 15 Olympic pools, which will be ready for use next month.