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Flight envelope is one of a number of related terms that are used in a similar fashion. It is perhaps the most common term because it is the oldest, first being used in the early days of test flight. It is closely related to more modern terms known as extra power and a doghouse plot which are different ways of describing the flight envelope of ...
One example of such a flight envelope protection device is an anti-stall system which is designed to prevent an aircraft from stalling, [7] for example in the form of a stick pusher that pushes the aircraft nose downward based on an input signal from a stall warning system, [8] or by means of other fly-by-wire actions.
Graph of altitude/speed region envelope for Lockheed U-2 depicting coffin corner. Coffin corner (also known as the aerodynamic ceiling [1] or Q corner) is the region of flight where a fast but subsonic fixed-wing aircraft's stall speed is near the critical Mach number, making it very difficult to keep an airplane in stable flight. Because the ...
Flight management system – A flight management system (FMS) is a fundamental component of a modern airliner's avionics. An FMS is a specialized computer system that automates a wide variety of in-flight tasks, reducing the workload on the flight crew to the point that modern civilian aircraft no longer carry flight engineers or navigators. A ...
The max q, or maximum dynamic pressure, condition is the point when an aerospace vehicle's atmospheric flight reaches the maximum difference between the fluid dynamics total pressure and the ambient static pressure. For an airplane, this occurs at the maximum speed at minimum altitude corner of the flight envelope.
It is usually impossible to know this by examining an envelope, and such items are not considered "airmail." Generally, airmail would take a guaranteed and scheduled flight and arrive first, while air-speeded mail would wait for a non-guaranteed and merely available flight and would arrive later than normal airmail.
In aerophilately, a branch of philately, a first flight cover, also known by the acronym FFC, is mail that has been carried on an inaugural flight of an airline, route, or aircraft, [1] normally postmarked with the date of the flight [2] often of the arrival destination proving it was actually carried on the aircraft [3] and may have a special ...
The orbits' envelope of the projectiles (with constant initial speed) is a concave parabola. The initial speed is 10 m/s. We take g = 10 m/s 2. We consider the following example of envelope in motion. Suppose at initial height 0, one casts a projectile into the air with constant initial velocity v but different elevation angles θ.