Secondary Effect of Rudder

Secondary effect of rudder is roll.

In this lesson, we will demonstrate the secondary effect of the rudder.

Learning Points

We have seen already that when the rudder is used with the wings level, the glider yaws, and does not turn. What happens if we use the rudder on its own, without actively keeping the wings level?

When flying slowly, if the rudder is used on its own the glider yaws, rolls, and the nose goes down. At best you’ll be in a skidding turn, but the result could easily be a spin or spiral dive, with significant loss of height.

When flying more quickly and using the rudder alone, the same effect is seen, but is less marked. A look at the string shows the glider skids.

If we use the aileron and rudder together, we can make a coordinated turn, meaning there is no wing drop or skid as we turn.


This demonstration is not the way to fly! Your goal is always to fly ‘coordinated’, using matching aileron and rudder movements together.

What happens if you use rudder without aileron?

Alternative Video without animation

Secondary effect of rudder, as seen in Condor’s Flight School
About the videos

Multiple versions of the videos are being made available:

  • With animation and voiceover.
  • Alternative without the animation graphics.
  • As recorded in Condor Flight School. These will have messages at the top of the screen, with no additional animation or voiceover – that’s the way the Condor cookie crumbles!

The videos are suited to any device that supports YouTube. If you have trouble loading the video in the browser, click on Watch on YouTube in the lower left corner.

Further Reading and References


The lessons were developed for Condor2. They will be updated from time to time. Visit the Downloads page for news of updates, and to request the latest version.

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