Dutch Roll
Tags: FAA Pilot's Handbook
Dutch roll: A Dutch Roll is a combination of rolling and yawing (coupled lateral/directional) oscillations that normally occurs when the dihedral effects of an aircraft are more powerful than the directional ...
Dutch Roll or Lateral - Directional Oscillation
This motion exists in any airplane for which the ratio of static directional stability and dihedral effect lies between the limiting conditions for spiral divergences and directional divergence.
Dutch Roll
A side-to-side wallowing motion of a model, often caused by insufficient fin area.
Enter your search terms Submit search form ...
Dutch roll is a messy combination of rolling, slipping, and yawing.2 As we shall see, this combined motion is less damped than the pure rolling, slipping, or yawing motions would be.
Do a few of the so-called (erroneously named) Dutch roll coordination exercises where you keep the nose on a point on the horizon while quickly rocking the wings back and forth from a 30° bank one way to the other way.
A side effect of dihedral can be roll coupling, a tendency for an aircraft to dutch roll. This is unpleasant to experience, and can lead to loss of control or can overstress an aircraft. A certain amount of anhedral can combat this effect.
If such a lowering of the nose for speed causes a descent below the desired glide path, apply full power and then back off as required to maintain approach speed. The 'Dutch roll' skill is required to keep such changes and adjustments smooth.
muscling required here, but no overt twitchiness either. Rudder input is nicely harmonized with the stick, too. After overdoing it initially, Ron Glazer has me do quick left/right bank reversals with no rudder input at all-the poor man's Dutch roll.
 See also: Aircraft, Roll, Stability, Pilot, Plane
  
|
RSS
