dutch roll(redirected from Roll-coupling)
Dutch roll[‚dəch ′rōl]
A motion of an airplane which consists of simultaneous oscillations of the bank (or roll) angle, the slideslip angle, and the heading angle, and which, when poorly damped, is annoying to passengers and pilots.
An undesirable oscillatory instability of an aircraft characterized by a combined rolling and yawing movement. It is predominant in swept-wing aircraft and can be overcome by reducing lateral stability and use of yaw dampers. This tendency is predominant at lower speed ranges.