TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

Most of the drift occurred 50 million to 80 million years ago. They attributed it to the mantle wind or the influence of a nearby mid-ocean spreading center that can capture a plume and divert it from its track.  1, record 1, English, - mantle%20wind

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

Les vents mantelliques. Le manteau de la Terre a ses vents, comme l'atmosphère. [...] Évidemment, on parle de vents qui ont une vitesse de quelques centimètres par année [...]  1, record 1, French, - vent%20mantellique

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

... a center drift may be driven... Powder economy may be a consideration, as blasting from radial holes parallel to the plane of the face is more effective than from holes normal to the face.  2, record 2, English, - center%20drift

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

Une galerie centrale [...] est percée d'un bout à l'autre du tunnel. Pour l'élargissement, on dispose les marteaux sur une colonne horizontale dans l'axe du tunnel. Les trous sont orientés radialement [...] Ce système est économique en explosif [...]  3, record 2, French, - galerie%20centrale

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

The microwave beam from the satellite solar power station(SSPS) is triggered by a pilot signal beamed from the center of the receiving antenna to provide the necessary phase control to produce a coherent beam. Otherwise, if the beam were to drift, its coherence would be lost, the energy dissipated, and the resulting power density would approximate normal communication signal levels on Earth.  2, record 3, English, - satellite%20solar%20power%20station

Record 3,  Textual support,  French

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, 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 4, English, - unbalance

Record number: 4, 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 4, English, - unbalance

Record 4,  Textual support,  French

Record number: 4, 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 4, French, - balourd

Record number: 4, 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 4, French, - balourd

Record number: 4, 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 4, French, - balourd

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, 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 5, English, - unbalanced

Record number: 5, Textual support number: 2 CONT

Unsymmetrical gyroscope.  2, record 5, English, - unbalanced

Record number: 5, 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 5, English, - unbalanced

Record 5,  Textual support,  French

Record number: 5, 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 5, French, - balourd%C3%A9

Record number: 5, Textual support number: 2 CONT

Gyroscope balourdé.  4, record 5, French, - balourd%C3%A9

Record number: 5, 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 5, French, - balourd%C3%A9

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, 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 6, English, - radial%2Dunbalance%20torque

Record 6,  Textual support,  French

Record number: 6, 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 6, French, - couple%20de%20balourd%20radial

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 DEF

Velocity changes of an object moving along a straight line or vector through the center of gravity.  3, record 7, English, - translational%20acceleration

Record number: 7, Textual support number: 1 CONT

Gyroscope drift rate effects are usually classified into three groups. The first group is independent of applied acceleration... The second group includes effects proportional to translational acceleration. This group covers such things as static unbalance of the inner gimbal assembly, i. e., the displacement between the center of support or buoyancy and the center of mass.  4, record 7, English, - translational%20acceleration

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 CONT

Selon [...] [le Principe d'Équivalence (PE) (postulat de Albert Einstein]), un effet d'accélération (inertie) et un effet gravitationnel (attraction entre deux masses gravitationnelles) sont équivalents. [...] les «sphères de Galilée» restent toujours l'idée maîtresse pour tester le PE. Notre idée est de tirer parti de la situation zéro-g pour comparer l'accélération angulaire de deux masses, plutôt qu'une accélération de translation, ce qui nous donnerait l'opportunité de faire «exploser» théoriquement la précision des résultats.  3, record 7, French, - acc%C3%A9l%C3%A9ration%20de%20translation

Record 7,  Textual support,  Spanish