Tue, Feb 03, 2009
Aero-Terms!
Aero-Terms are designed to be a daily reminder of the terms,
names, acronyms and explanations of the unique language that
populates the aviation world. Aerospace, sport aviation, fixed
wing, helo, you name it... it's all fair game.
Aero-Terms should serve as a quick but intriguing reminder of
the terms you may use every day, or an introduction to an aspects
of the Aero-World you may not yet be familiar with. ANN also
encourages readers to go beyond the FMI link, and further research
any intriguing terms.
Suggestions for future Aero-Terms are ALWAYS
welcome, as are additions or discussion of the
explanations given for each Aero-Term.
Yaw String
The yaw string, also known as a slip string, is a simple device
for indicating a slip or skid in an aircraft in flight. It performs
the same function as the slip-skid indicator ball, but is more
sensitive, and does not require the pilot to look down at the
instrument panel. Technically, it measures sideslip angle,
not yaw angle, but this indicates how the aircraft must be yawed to
return the sideslip angle to zero. The yaw string is
considered a primary flight reference instrument on gliders, which
must be flown with near zero sideslip angle to reduce drag as much
as possible. It is valued for its high sensitivity, and the fact
that it is presented in a head-up display. Even the most
sophisticated modern racing sailplanes are fitted with yaw strings
by their pilots, who reference them constantly throughout the
flight.
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