Aviation Dictionary

Speed instability

A condition in the region of reverse command where a disturbance that causes the airspeed to decrease causes total drag to increase, which in turn, causes the airspeed to decrease further.

Dictionary Term

Speed instability

Definition

A condition in the region of reverse command where a disturbance that causes the airspeed to decrease causes total drag to increase, which in turn, causes the airspeed to decrease further.

References

Airplane Flying Handbook, Federal Aviation Administration, 2021