What is coffin corner used for?
Q-Corner or Coffin Corner. A term used to describe operations at high altitudes where low IAS yield high TAS (as indicated by Mach number) at high angles of attack (AOA). The high AOA results in flow separation, which causes buffet.
What causes coffin corner?
Coffin corner occurs from the interaction between stall speed and critical mach speed, which are both caused by pressure over your wing. Get too fast, and you’ll exceed your critical mach number. The air over your wings will go supersonic, you’ll pitch down, the aircraft will accelerate, and your wings will fall off.
What altitude is coffin corner?
At an altitude of approximately 13,000 ft., the buffet onset AOA occurred at 16.84 deg. In contrast, in straight and level flight at FL 450 the buffet onset AOA was 6.95 deg. In other words, be wary of your pitch attitude while at high altitudes because of the limited range of AOA due to Mach effects.”
What happens to stall speed as altitude increases?
As air density decreases with increasing altitude, more lift must be generated by an aerofoil to sustain flight and so the true air speed at which an aerofoil will stall will increase.
How do you heal a coffin corner?
To recover, you push the stick forward, letting the craft’s nose go down and the speed over the wings increase. You start flying again and can bring the stick back to a straight and (almost) level glide.
What is a coffin corner in a house?
As the placard states, the coffin corner is a niche added to the top of the stairs in Victorian homes to aid in the removal of the coffin. Back in those days, folks usually died at home and the body was laid out in the parlor on the first floor.
What is the highest flying jet?
Answer: The highest commercial airliner altitude was 60,000 feet by Concorde. The highest military air-breathing engine airplane was the SR-71 — about 90,000 feet. The highest airliner flying today reaches 45,000 feet. The highest business jet flying today reaches 51,000 feet.
Why do Jets stall at high altitude?
The slower an aircraft flies, the higher the angle of attack must be in order for the aircraft to have enough lift. If it does not reach the necessary stallspeed, the stall occurs. Shortly after take-off, an aircraft needs considerable thrust in order to simultaneously increase its speed and gain altitude.
What is Mach buffet?
Mach buffet (vibrate) is “high-speed” buffet. It occurs when too fast in an airspeed or too high in an AOA near the Mmo. Usually, airflow separation due to shock wave as well as wave drag produces a turbulent wake behind the wing, which causes the tail surface to buffet (vibrate).
How tall is an Airbus A340 in feet?
1 Overall length 75.36 m 247 ft 3 in 2 Range 14 450 km 7 800 nm 3 Typical seating 3-class 320-370 320-370
Which is the largest member of the A340 family?
The A340-600 is the largest-capacity member of Airbus’ A340 Family, with an overall length of 75.36 metres and accommodations for 320 to 370 passengers (or 475 in high-density seating). The aircraft – which can be used effectively in commercial, corporate or government operations – includes state-of-the-art technologies such as…
When did Virgin Atlantic get their first Airbus A340?
Virgin Atlantic took delivery of their first Airbus A340 back in 1993. This was their first newly delivered aircraft. Previously, the airline operated a fleet of 7 second hand Boeing 747-200 aircraft. The new deliveries enabled the airline to offer non-stop services between London and Tokyo.
Which is the best aircraft to replace an A340-600?
In the secondary market, the A340-600 is ideal for replacing competing aircraft, with 20 per cent lower fuel per trip and a more modern cabin with the latest technology.