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What is s speed Airbus?
S speed is the minimum slats retrac- tion speed, i.e. the minimum speed at which a clean configuration should be selected. It is represented by a green “S” on the PFD speed scale and displayed only when the slats / flaps control lever is on position 1 (CONF 1 and 1+F) (fig. 2).
What is Coffin Corner in aviation?
In aviation, coffin corner (or Q corner) refers to the point at which the Flight Envelope boundary defined by a high incidence stall intersects with that defined by the critical Mach number. In commercial and general aviation operations, flight at altitudes approaching coffin corner is generally avoided.
What is the landing speed of an Airbus A380?
An A380 crosses the landing threshold at a docile 140 knots and touches down, depending on its landing weight, at a speed as slow as 130 knots, about the same touchdown speed of some corporate jets that weigh 1/50th as much as the world’s biggest airliner.
How do you calculate descent?
A quick and easy way to figure it out is to start with your altitude above field elevation and multiply that number by three. This will give you the approximate distance in nautical miles from the airport to start a 500-foot-per-minute descent in the typical light general aviation airplane and reach pattern altitude.
What does the green dot on the speed tape mean?
Green Dot (GD) speed is a term used by Airbus. It is named after the symbol on the speed tape. It refers to the speed that results in the best climb gradient in case of an engine failure, but it is close the speed resulting in best L/D ratio with all engines operating.
What does the green dot on the PFD mean?
It is represented by a green dot on the PFD speed scale and displayed only when the slats / flaps control lever is in the ‘0’ (CLEAN) position and landing gears are not compressed How is GD determined? GD speed is computed by the Autoflight systems and is based on the aircraft weight.
What’s the difference between bank angle and stall speed?
Bank Angle and G’s. Note that the stall speed, or minimum flying speed, begins to increase rapidly beyond a bank angle of 60° which corresponds to 2 g’s. As the bank angle approaches 90°, the minimum flying speed approaches infinity.
What happens when an aircraft is rolled to the same bank angle?
The lift vector L acting on the aircraft is also rolled by that same angle such that it no longer directly opposes the plane’s weight. Now observe the following diagram. In both cases, the aircraft is rolled to the same bank angle. In the first case, however, the vertical component of lift is less than the weight.