Icing

What is a deicing system? A deicing system is one in which ice is allowed to build up on a surface and is then removed, e.g., with pneumatic leading-edge boots. What is an anti-icing system?…


TAI To Employ 3.000 Engineers

3 Thousand engineers will be employed in Turkish Aerospace Industries TAI’s “National fighter jet” project. TAI began to employ engineers last month to start planning and organizing the newest project of national fighter jet. The…



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Dutch Roll

What is Dutch roll? Dutch roll is an oscillatory instability associated with swept-wing jet aircraft. It is the combination of yawing and rolling motions. When the aircraft yaws, it will develop into a roll. The…


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Stall

Why an aircraft stalls? An aircraft stalls when the streamlined/laminar airflow (or boundary layer) over the wing’s upper surface, which produces lift, breaks away from the surface when the critical angle of attack is exceeded,…


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Coffin Corner

What is coffin corner? Coffin corner occurs at an aircraft’s absolute ceiling, where the speeds at which Mach number buffet and prestall buffet occur are coincident, and although trained for, in practice, they are difficult…


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Mach Tuck

What is Mach tuck? Mach tuck is the nose-down pitching moment an aircraft experiences as it passes its critical Mach number (Mcrit). Mach tuck is a form of longitudinal instability that occurs because of the…


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What is Mach Number?

What is Mach number? Mach number (MN) is a true airspeed indication, given as a percentage relative to the local speed of sound; e.g., half the speed of sound = 0.5 Mach. What is the…


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Speed

Speed stability Speed stability is the behavior of the speed after a disturbance at a fixed power setting. The behavior of an aircraft’s speed after it has been disturbed is a consequence of the drag…


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What is Swept Wing ?

In designing a high-speed wing, you need to consider first the requirement for economical high-speed performance in the cruise configuration. However, you also have to consider the restraints on the design of the need to…