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For an aircraft to possess positive static stability, it is not necessary for its level to return to exactly what it was before the upset. It is sufficient that the speed and orientation do not continue to diverge but undergo at least a small change back towards the original speed and orientation. [11]: 477 [7]: 3
If speed decreases, drag decreases, and the aircraft will accelerate back to its equilibrium speed where thrust equals drag. However, in slow flight, due to lift-induced drag, as speed decreases, drag increases (and vice versa). This is known as the "back of the drag curve". The aircraft will be speed unstable, because a decrease in speed will ...
Body-fixed axes, or "body axes", are defined and fixed relative to the body of the vehicle.: [1] X body axis is aligned along the vehicle body and is usually positive toward the normal direction of motion. Y body axis is at a right angle to the x body axis and is oriented along the wings of the vehicle.
The pitot–static system of instruments uses the principle of air pressure gradient. It works by measuring pressures or pressure differences and using these values to assess the speed and altitude. [1] These pressures can be measured either from the static port (static pressure) or the pitot tube (pitot pressure).
static pressure + dynamic pressure = total pressure. This simplified form of Bernoulli's equation is fundamental to an understanding of the design and operation of ships, low speed aircraft, and airspeed indicators for low speed aircraft – that is aircraft whose maximum speed will be less than about 30% of the speed of sound.
A fixed budget and a static budget are the same thing. Unlike flexible budgets, static or fixed budgets predict income and expenses in advance. Income is anticipated to stay the same and as a ...
At its mildest, this can appear as a "buzz" in the aircraft structure, but at its most violent, it can develop uncontrollably with great speed and cause serious damage to the aircraft or lead to its destruction, [10] as in Northwest Airlines Flight 2 in 1938, Braniff Flight 542 in 1959, or the prototypes for Finland's VL Myrsky fighter aircraft ...
Fixed Expenses vs. Variable Expenses: Quick Take. If you want to make sure you have enough money for necessities and unplanned expenses, you must create a budget. For that, learning the difference ...