2007-02-11 21:32:57 · 4 answers · asked by shamrock_bhoy 1 in Cars & Transportation ➔ Aircraft
Usually aircraft are designed to be stable. An airplane is stable when its mass center is forward than aerodynamic center.(like a dart) But stability has a cost, in fact a downward lift is needed to keep equilibrated a stable, so the lift must be bigger than the weight. So reduce stability is a good way to improve aircraft efficiency, but an aircraft can not be too less stable unless become uncontrollable by the pilot.
In Military canard fighters(Eurofighter, Rafale, J-10, Lavi, Viggen, Griphen.) the plane is designed to be unstable so it is much more agile(it is needed also for vectorized thrust airplanes like Su-37,F-22,and some Mig-29s), but the pilot to keep the control needs an advanced active control system that is able to "correct" the instability(the pilot is too slow in response) and to keep the airplane in controllable conditions.
So it is not really an active stability, but an active system to keep control over unstable(or with a too little margin of stability) machines.
2007-02-12 03:06:21 · answer #1 · answered by sparviero 6 · 0⤊ 0⤋
Could you be a little more specific? Are you refering to the kind of "active stability" found in some cars (i.e. Mercedes-Benz "Electronic Stability Program")?
2007-02-12 05:43:29 · answer #2 · answered by Fulani Filot 3 · 0⤊ 0⤋
Yes, I do.
2007-02-13 10:10:41 · answer #3 · answered by pdkflyguy 3 · 0⤊ 0⤋
not today
2007-02-12 05:57:50 · answer #4 · answered by Anonymous · 0⤊ 0⤋