negative stability

negative stability

negative stabilityclick for a larger image
A nose-up displacement will aggravate in situation (B). Thus (B) has negative stability.
A condition in which the aircraft tends to move away from its original position when disturbed from its original position even when external force has been removed. This is the feature of most modern combat aircraft where aircraft is unstable instead of naturally stable. This is to ensure greater agility and maneuverability. Also known as negative static stability and static instability.
References in periodicals archive ?
1 shows the negative stability margins DSM (red curve) and SSM (blue curve) during this period, From the Figure 6.
Unique vertical/short takeoff and landing (V/STOL) aerodynamic considerations, such as intake momentum drag, yaw roll coupling, and negative stability between 30 and 90 knots, are mentioned without explanation to the uninitiated reader.