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Results tagged with aircraft-limitations
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user 1961
All aircraft have specified performance limitations that they cannot (or at least should not) exceed, for altitude, speed, weight etc.
7
votes
Why does maneuvering speed vary with weight?
The maneuvering airspeed $v_A$ ensures that the maximum structural load is not exceeded even with maximum control surface deflection. Wikipedia says this is valid only when a single control surface is …
- 237k
164
votes
Accepted
Even after years of research, why are planes unable to keep passengers alive in case of a fi...
Short answer
The kinetic energy involved in a plane crash is inhumanely high.
Slightly longer answer
We can built bombs which will go through concrete roofs and ceilings of a bunker, counting the n …
- 237k
3
votes
Accepted
Are fly-by-wire fighters protected in AoA?
Brief answer: Yes, but the protection does not always work.
Most modern fighter aircraft have an AoA limiter. That is different from a stall warning – in case of the McDonnell Douglas F-4 the limit w …
- 237k
17
votes
Accepted
How come planes can endure more positive than negative g's? I.e. how come V-n diagrams are n...
The lines start at zero load factor because with no speed there is no lift. If you move further right, the upper line is determined by the maximum lift, while the lower line is determined by the minim …
- 237k
1
vote
Accepted
Why does the maximum allowable load factor vary with airspeed in some aircraft?
@JZYL is right. When I wrote the answer, I had buffeting limits in mind. Of course they can be exceeded at the cost of ride quality, but going further into buffeting will also reduce control effectivi …
- 237k
27
votes
Accepted
What is the maximum safe bank angle of a 747?
The descent angle helps to reduce the lift that the wing needs to provide, in two ways. It leads the aircraft into higher density air, where more absolute lift is possible at the same Mach number. Tha …
- 237k