Indianfighter
Junior Member
Re: New JF-17/FC-1 Fighter Aircraft thread
Manual handling of instability was probably possible only in ww2 jets and small trainers now, but it has never been present in larger fighter aircraft.
All of this may be true except that instability in different axes is totally independent of each other. All modern fighter aircraft are only pitch unstable, but have FBW in all 3 axes, and atleast in case of you-know-what, the FBW testing has been done keeping into account spin avoidance during high AoA.The last paragraph is certainly wrong. Stability in different axis are caused by different factors that don't affect one another. For example pitch instability is caused by the center of lift being ahead of center of gravity, which has nothing to do with lateral stability that dictates roll. The latter is caused by the differences of lift between the two wings. In fact aircraft that is laterally stable can have FBW, and aircraft that is laterally unstable may be manual. A number of world war II fighters can be considered laterally unstable like the Fw 190A. Static directional stability is determined by the size of the tail fin and you always want this stable by all means. Fighters can be unstable in only one axis, and its not necessary, even detrimental to be unstable in all three, and you can't certainly be unstable on yaw if you want to be flight worthy.
Manual handling of instability was probably possible only in ww2 jets and small trainers now, but it has never been present in larger fighter aircraft.
I think the website's claims need more examination. It claims stability augmentation in roll and yaw axes, even though all fighters are instable only in pitch axis. Secondly it further claims that these two axes are not FBW, but are conventional, even though it is well known there is no modern fighter aircraft which leaves yaw or roll instability for the pilot and his mechanical controls to handle (it is only possible in small trainers). So that's why that claim may need more examination, moreover as that website is known for errors and ambiguous specifications (like loading and top-speed).The official confirmation is already there so don't keep on insisting the contrary and grasping empty straws.
That's true, but the pilot's workload increases because stable aircraft have a tendency to resist maneuvers whereas instable ones have a tendency to assist maneuvers. This was a novel concept developed to reduce the pilot's workload while maneuvering, while delegating the task of normal flight to flight-control.Munir said:We know that JF17 can handle 8,5 G. Whether it uses FBW or not... The opponent will not feel much difference. The F16 is able to handle more but it does not mean it will win easily 1v1 when opposing JF17...
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