Yaw string | Article about yaw string by The Free Dictionary
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A string with one end that is attached to an aircraft's canopy or is visible elsewhere to the pilot and exposed to the relative wind. Its angle shows whether the aircraft is flying straight into the airstream or at an angle.
References in periodicals archive
Tied to the noseplate or front lower wires of a hang glider--or taped to the base of a sailplane canopy, as shown in the image below--the simple yaw string
accurately shows whether a turn is in a slip, a skid or is nicely coordinated.
Note the yaw string
is deflected left, while the inclinometer in the turn-and-bank instrument is deflected to the right.
Some training organizations tape a yaw string
on the nose or windscreen of a twin, a simple piece of yarn that indicates zero side-slip if it is blowing in complete alignment with the airplane's centerline.