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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

The characteristic of a gyro resulting from lack of coincidence of the center of supporting forces and the center of mass. It gives rise to torques caused by linear accelerations that lead to acceleration-sensitive drift rates.  4, record 1, English, - unbalance

Record number: 1, Textual support number: 1 CONT

Gyro drift is caused by random and fixed torques, such as those resulting from bearing friction or mass unbalance. Mass unbalance results in a torque due to gravity.  5, record 1, English, - unbalance

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Mauvaise répartition des masses d'une pièce ou d'un ensemble tournant, qui fait que son centre de gravité n'est pas sur l'axe de rotation.  4, record 1, French, - balourd

Record number: 1, Textual support number: 1 CONT

Dans un gyroscope intégrateur flottant, un décalage de 2 nm [...] entre le centre de gravité et le centre de poussée d'Archimède produit un balourd suffisant pour créer une dérive de 10 [puissance -2] degrés par heure.  5, record 1, French, - balourd

Record number: 1, Textual support number: 2 CONT

La dérive du gyroscope [...] est causée par des couples [...] fortuits et permanents, tels que ceux résultant de la friction dans les roulements et le déséquilibre de la masse. Le déséquilibre de la masse provoque un couple dû à la gravité.  3, record 1, French, - balourd

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

The vacuum-drive heading indicator is the simplest of many types of gyro-controlled directional indicators designed to provide stable heading reference. ... Errors. The chief cause of precession, causing the card to creep or drift, is bearing friction. Normal movement of the gimbal rings produces friction, which is increased if the bearings are worn, dirty, or improperly lubricated. Other sources of precession error include unbalanced gyro components and the effect of the earth’s rotation. The latter effect depends upon the position of the instrument in relation to the earth, and is not appreciable unless a flight involves considerable change in latitude.  1, record 2, English, - unbalanced

Record number: 2, Textual support number: 2 CONT

Unsymmetrical gyroscope.  2, record 2, English, - unbalanced

Record number: 2, Textual support number: 1 OBS

mass unbalance : The characteristic of a gyro resulting from lack of coincidence of the center of supporting forces and the center of mass. It gives rise to torques caused by linear accelerations that lead to acceleration-sensitive drift rates.  2, record 2, English, - unbalanced

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

Garde-cap. Il s'agit d'un gyroscope que l'on maintient horizontal et qui définit une direction fixe dans le plan horizontal à sa dérive près. Le gyroscope est monté à la Cardan comme dans le cas du compas mais il n'est pas balourdé. Un détecteur d'horizon monté sur la caisse de tore délivre un signal proportionnel à l'inclinaison du moment cinétique; ce signal est traité et est envoyé dans un moteur couple d'axe cd qui crée un couple vertical ramenant le moment cinétique horizontal.  3, record 2, French, - balourd%C3%A9

Record number: 2, Textual support number: 2 CONT

Gyroscope balourdé.  4, record 2, French, - balourd%C3%A9

Record number: 2, Textual support number: 1 OBS

balourd : Mauvaise répartition des masses d'une pièce ou d'un ensemble tournant, qui fait que son centre de gravité n'est pas sur l'axe de rotation.  5, record 2, French, - balourd%C3%A9

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

[Of a gyro or accelerometer] the product of the inertial-sensing mass and the distance from the center of mass to the center of support measured along the pendulous axis.  2, record 3, English, - pendulosity

Record number: 3, Textual support number: 1 CONT

pendulous integrating gyroscopic accelerometer: A linear accelerometer using a single-degree-of-freedom gyro having a pendulosity along the spin axis that is servo-driven about the input axis at a rate that balances the torque induced by sensed acceleration along the input axis. The angle through which the servoed axis rotates is proportional to the integral of the sensed acceleration.  2, record 3, English, - pendulosity

Record 3,  Textual support,  French

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

The acceleration-sensitive torque caused by radial unbalance due to noncoincidence of the flexure axis and the center of mass of the rotor. Under constant acceleration, it appears as a rotating torque at the rotor spin frequency. When the gyro is subjected to vibratory acceleration along the spin axis at the spin frequency, this torque results in a rectified drift.  2, record 4, English, - radial%2Dunbalance%20torque

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 OBS

balourd : Mauvaise répartition des masses d'une pièce ou d'un ensemble tournant, qui fait que son centre de gravité n'est pas sur l'axe de rotation.  2, record 4, French, - couple%20de%20balourd%20radial

Record 4,  Textual support,  Spanish