indicateur bille-aiguille

CONT: L'indicateur de virage. Il est composé de deux éléments indépendants; une bille et une aiguille, d'où son autre appellation : bille-aiguille. La bille renseigne sur la symétrie du vol. L'aiguille renseigne sur le sens du virage.
OBS: indicateur de virage et de dérapage; indicateur bille-aiguille : termes uniformisés par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Opérations aériennes.

CONT: Turn and slip indicator. The instrument is composed of two components. The turn needle is an electrically driven gyroscope which indicates the rate of turn. The marks (often called the doghouse) on either side of center represents a bank angle of 15 degrees. ... The glass level containing the black ball is called the inclinometer. It provides the pilot with a measure of the turn quality. During both straight and level flight and during turns the ball should stay centered. The turn and slip indicator acts as a partial backup to the attitude indicator in that it shows rate of turn.
OBS: This type of instrument is usually found in older aircraft. ... The turn coordinator is similar to the turn and slip indicator. Is is found in more modern aircraft. The main difference is in the presentation of the turn. A miniature airplane is used to show the bank instead of a needle.