These tail rudders and side stabilizers are controlled by air pressure.

Once upon a time, it had been a fallen chipwing with a broken tail rudder, or a wounded toyo pup.

The colorful dragon/flag roundel appeared in various sizes, most often on the tail rudder.

The turbulence and wind shear caused a crack in either the tail rudder, the tailplane, or both.

The next year, they added a tail rudder for turning right or left - yaw control.

A cool, moist wind smelling of rain was causing the tail rudder to flap wildly.

Normally, Bobby would be following it around, pointing out the hand-painted swastika on the tail rudder.

The tail rudders and side stabilizers are operated by air pressure.

Engineers also discovered a new holdup, a problem in the tail rudder, Mr. Readdy said.

A new holdup is a problem discovered in the tail rudder, which also serves as a speed brake.