Category: Flight Mechanics
Transonic flight occurs in the range of Mach 0.72 to 1.0 (965–1,235 km/h (600–767 mph) at sea level). At this speed we see a rapid increase in drag from about Mach 0.8, and at the same time the fuel costs rise dramatically. Attempts to reduce wave drag can be seen on all high-speed aircraft. Most notable is the use of swept wings, but another common form is a wasp-waist fuselage as a side effect of the Whitcomb area rule.
Severe instability can occur at transonic speeds. Shock waves move through the air at the speed of sound. When an object such as an aircraft also moves at the speed of sound, these shock waves build up in front of it to form a single, very large shock wave. During transonic flight, the plane must pass through this large shock wave, as well as contend with the instability caused by air moving faster than sound over parts of the wing and slower in other parts.
Why Planes Don’t Fly Faster
Shock Wave Formation in Transonic Flight
The 87-metre-tall (285 ft) airport traffic control tower (ATCT). Dubai International Airport (IATA: DXB, ICAO: OMDB) is operated by the Dubai Airports Company and is the home base of Dubai’s international airlines, Emirates and flydubai. The Emirates hub is the largest airline hub in the Middle East; Emirates handles 51% of all passenger traffic and accounts for approximately 42% of all aircraft movements at the airport. Dubai Airport is also the base for low-cost carrier flydubai which handles 13% of passenger traffic and 25% of aircraft movements at DXB. The airport has a total capacity of 90 million passengers annually. As of January 2016, there are over 7,700 weekly flights operated by 140 airlines to over 270 destinations.