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turn coordinatorThe turn coordinator (TC) is a further development of the turn and slip indicator with the major difference being the display and the axis upon which the gimbal is mounted. The display is that of a miniature airplane as seen from behind. This looks similar to that of an attitude indicator. "NO PITCH INFORMATION" is usually written on the instrument to avoid confusion regarding the aircraft's pitch, which can be obtained from the artificial horizon instrument.

In contrast to the T/S, the TC's gimbal is pitched up 30 degrees from the lateral axis. This causes the instrument to respond to roll as well as yaw. This allows the instrument to display a change more quickly as it will react to the change in roll before the aircraft has even begun to yaw. Although this instrument reacts to changes in the aircraft's roll, it does not display the roll attitude.

The turn coordinator may be used as a performance instrument when the attitude indicator has failed. This is called "partial panel" operations. It can be unnecessarily difficult or even impossible if the pilot does not understand that the instrument is showing roll rates as well as turn rates. The usefulness is also impaired if the internal dashpot is worn out. In the latter case, the instrument is underdamped and in turbulence will indicate large full-scale deflections to the left and right, all of which are actually roll rate responses. In this condition it may not be possible for the pilot to maintain control of the aircraft in partial-panel operations in instrument meteorological conditions. For this and other reasons, many highly experienced pilots prefer the "older" turn and bank indicator design.

Servicing These Bands & More

Gyros, Gyros & Gyros!

Rebuilting Confidence in Aircraft Gyros since 1987
Nu-Tek Aircraft instruments, Inc.
7169 SW Santa Fe Lake Road
Augusta, KS 67010
PH: 800-338-7146
FX: 316-775-1194

New RC Allen Gyros

horizon directional gryos
Nu-Tek Aircraft Instruments, Inc. is Authorized Distributor of RC Allen

Types of Gyros

Typical Gyros Repair & Overhauls
Directional Gyro, Attitude Gyro, Standard Horizon, Turn Coorindator, Turn & Bank, and Turn & Slip

Common Brands
Edo-Aire, Sigma-Tek, Aeritalia, RC Allen, Electric Gyro Corporation (E.G.C.), Aviation Instrument Manufactor (AIM), General Design, and King