TERMIUM Plus®
The Government of Canada’s terminology and linguistic data bank.
DRIFT INDICATOR [11 records]
Record 1 - internal organization data 2024-06-11
Record 1, English
Record 1, Subject field(s)
- Skydiving, Paragliding and Hang Gliding
- Airborne Forces
Record 1, Main entry term, English
- canopy drift
1, record 1, English, canopy%20drift
correct, officially approved
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
The horizontal movement of a canopy when inflated and without parachutist input. 2, record 1, English, - canopy%20drift
Record number: 1, Textual support number: 1 CONT
The most accurate method for judging canopy drift is the use of a wind drift indicator(WDI). 3, record 1, English, - canopy%20drift
Record number: 1, Textual support number: 1 OBS
canopy drift: designation and definition officially approved by the Army Terminology Panel. 2, record 1, English, - canopy%20drift
Record 1, French
Record 1, Domaine(s)
- Parachutisme, parapente et deltaplane
- Forces aéroportées
Record 1, Main entry term, French
- dérive sous voile
1, record 1, French, d%C3%A9rive%20sous%20voile
correct, feminine noun, officially approved
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Mouvement horizontal d'une voilure lorsqu'elle s'ouvre et sans intervention du parachutiste. 2, record 1, French, - d%C3%A9rive%20sous%20voile
Record number: 1, Textual support number: 1 CONT
La méthode la plus précise pour évaluer la dérive sous voilure est l'utilisation d'un indicateur de dérive de vent (IDV). 3, record 1, French, - d%C3%A9rive%20sous%20voile
Record number: 1, Textual support number: 1 OBS
dérive sous voile : désignation et définition uniformisées par le Groupe d'experts en terminologie de l'Armée de terre. 4, record 1, French, - d%C3%A9rive%20sous%20voile
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2022-08-11
Record 2, English
Record 2, Subject field(s)
- Skydiving, Paragliding and Hang Gliding
- Airborne Forces
Record 2, Main entry term, English
- wind drift indicator
1, record 2, English, wind%20drift%20indicator
correct
Record 2, Abbreviations, English
- WDI 1, record 2, English, WDI
correct
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 OBS
A wind drift indicator is used to determine the proper release point for jumpers on light aircraft operations. A WDI incorporates the exact drift and rate of descent characteristics of a paratrooper with a fully inflated parachute. 2, record 2, English, - wind%20drift%20indicator
Record 2, Key term(s)
- wind-drift indicator
Record 2, French
Record 2, Domaine(s)
- Parachutisme, parapente et deltaplane
- Forces aéroportées
Record 2, Main entry term, French
- indicateur de dérive du vent
1, record 2, French, indicateur%20de%20d%C3%A9rive%20du%20vent
correct, masculine noun
Record 2, Abbreviations, French
- IDV 1, record 2, French, IDV
correct, masculine noun
Record 2, Synonyms, French
Record 2, Textual support, French
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - external organization data 2021-03-18
Record 3, English
Record 3, Subject field(s)
- Compartment – Nomenclature 4.0
- Museums and Heritage (General)
Record 3, Main entry term, English
- borehole drift indicator
1, record 3, English, borehole%20drift%20indicator
correct
Record 3, Abbreviations, English
Record 3, Synonyms, English
Record 3, Textual support, English
Record number: 3, Textual support number: 1 OBS
borehole drift indicator : an item in the "Mining and Mineral Harvesting Tools and Equipment" class of the "Tools and Equipment for Materials" category. 2, record 3, English, - borehole%20drift%20indicator
Record 3, French
Record 3, Domaine(s)
- Tiroir – Nomenclature 4.0
- Muséologie et patrimoine (Généralités)
Record 3, Main entry term, French
- indicateur de pendage du puits
1, record 3, French, indicateur%20de%20pendage%20du%20puits
correct, masculine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
Record 3, Textual support, French
Record number: 3, Textual support number: 1 OBS
indicateur de pendage du puits : objet de la classe «Outils et équipement d'exploitation minière et d'extraction minérale» de la catégorie «Outillage et équipement pour le traitement des matières». 2, record 3, French, - indicateur%20de%20pendage%20du%20puits
Record 3, Spanish
Record 3, Textual support, Spanish
Record 4 - external organization data 2021-03-18
Record 4, English
Record 4, Subject field(s)
- Compartment – Nomenclature 4.0
- Museums and Heritage (General)
Record 4, Main entry term, English
- drift indicator
1, record 4, English, drift%20indicator
correct
Record 4, Abbreviations, English
Record 4, Synonyms, English
Record 4, Textual support, English
Record number: 4, Textual support number: 1 OBS
drift indicator : an item in the "Aerospace Transportation Tools and Equipment" class of the "Distribution and Transportation Objects" category. 2, record 4, English, - drift%20indicator
Record 4, French
Record 4, Domaine(s)
- Tiroir – Nomenclature 4.0
- Muséologie et patrimoine (Généralités)
Record 4, Main entry term, French
- cinémodérivomètre
1, record 4, French, cin%C3%A9mod%C3%A9rivom%C3%A8tre
correct, masculine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
Record 4, Textual support, French
Record number: 4, Textual support number: 1 OBS
cinémodérivomètre : objet de la classe «Outillage et équipement de transport aérospatial» de la catégorie «Objets de manutention et de transport». 2, record 4, French, - cin%C3%A9mod%C3%A9rivom%C3%A8tre
Record 4, Spanish
Record 4, Textual support, Spanish
Record 5 - internal organization data 2017-01-13
Record 5, English
Record 5, Subject field(s)
- General Mechanics (Physics)
- Aircraft Piloting and Navigation
- Navigation Instruments
- Flight Instruments and Equipment (Aeroindustry)
Record 5, Main entry term, English
- gyro drift
1, record 5, English, gyro%20drift
correct
Record 5, Abbreviations, English
Record 5, Synonyms, English
- gyroscopic drift 2, record 5, English, gyroscopic%20drift
correct
- drift 3, record 5, English, drift
correct, noun
- drifting 4, record 5, English, drifting
correct, see observation
Record 5, Textual support, English
Record number: 5, Textual support number: 1 CONT
Angular rate gyro accuracy is characterized by two parameters: scale factor and drift. The scale factor describes the capability of the gyro to accurately sense angular velocity at different angular rates ... Gyro drift characterizes the ability of the gyro to reference all rate measurements to the nominal zero point. It appears as an additive term on the gyro output, so any actual drift away from a given or predetermined value will cause the angular errors to accumulate. 3, record 5, English, - gyro%20drift
Record number: 5, Textual support number: 2 CONT
The free gyro... can be converted to a directional reference by remounting its case with the spin axis horizontal and the indicator axis vertical. The indicator will then give the airplane's heading. Gyro drift is countered by slaving the instrument to the Earth's magnetic field, via either a separate magnetic compass or a flux valve device. 5, record 5, English, - gyro%20drift
Record number: 5, Textual support number: 1 OBS
The change in azimuth (direction) of the spin axis is often referred to as "drifting": sometimes "tilting" and "drifting" are collectively called "apparent wander." 4, record 5, English, - gyro%20drift
Record 5, Key term(s)
- gyroscope drift
Record 5, French
Record 5, Domaine(s)
- Mécanique générale (Physique)
- Pilotage et navigation aérienne
- Instruments de navigation
- Instruments et équipement de bord (Constructions aéronautiques)
Record 5, Main entry term, French
- dérive du gyroscope
1, record 5, French, d%C3%A9rive%20du%20gyroscope
correct, feminine noun
Record 5, Abbreviations, French
Record 5, Synonyms, French
- dérive gyroscopique 2, record 5, French, d%C3%A9rive%20gyroscopique
correct, feminine noun
- dérive 3, record 5, French, d%C3%A9rive
correct, feminine noun
Record 5, Textual support, French
Record number: 5, Textual support number: 1 CONT
Le défaut de stabilité, appelé dérive du gyroscope mesurée en degrés par heure [...], ou en degrés par seconde [...], dépend de la technologie mise en œuvre et de la qualité de la «suspension» de l'élément sensible et de son isolement vis-à-vis des influences externes (température, gravité, gaz ambiant, etc.). 4, record 5, French, - d%C3%A9rive%20du%20gyroscope
Record number: 5, Textual support number: 2 CONT
Pour l'utilisation sur les centrales inertielles, il s'est révélé nécessaire de développer des gyroscopes présentant une dérive pratiquement négligeable. Or la cause principale de cette dérive réside dans les frottements qui s'exercent sur le corps du gyroscope, dont la vitesse de rotation dépasse 20 000 tr/min. Divers moyens ont été imaginés pour créer des suspensions sans frottement [...] 5, record 5, French, - d%C3%A9rive%20du%20gyroscope
Record number: 5, Textual support number: 1 OBS
L'usage fait donner des appellations différentes à cette composante de rotation instantanée [...] : lorsqu'elle est due à un phénomène déterministe et connu, on l'appelle précession gyroscopique; lorsqu'elle est due à un phénomène aléatoire, ou bien que l'on ne maîtrise pas, on l'appelle dérive gyroscopique. 6, record 5, French, - d%C3%A9rive%20du%20gyroscope
Record number: 5, Textual support number: 2 OBS
Ce mouvement est dit «mouvement de précession» s'il est provoqué volontairement, et «dérive» s'il est dû à un élément perturbateur. 7, record 5, French, - d%C3%A9rive%20du%20gyroscope
Record 5, Spanish
Record 5, Textual support, Spanish
Record 6 - internal organization data 2015-10-23
Record 6, English
Record 6, Subject field(s)
- General Mechanics (Physics)
- Flight Instruments and Equipment (Aeroindustry)
- Launching and Space Maneuvering
- Helicopters (Military)
Record 6, Main entry term, English
- precessional motion
1, record 6, English, precessional%20motion
correct
Record 6, Abbreviations, English
Record 6, Synonyms, English
- precession 2, record 6, English, precession
correct
- precessional movement 3, record 6, English, precessional%20movement
correct
- gyroscopic precession 4, record 6, English, gyroscopic%20precession
correct
- precession of the gyroscope 5, record 6, English, precession%20of%20the%20gyroscope
correct
- gyro precession 6, record 6, English, gyro%20precession
correct
Record 6, Textual support, English
Record number: 6, Textual support number: 1 DEF
The tendency of a rotating body, when a force is applied perpendicular to its plane of rotation, to turn in the direction of its rotation 90 degrees to its axis and take up a new plane of rotation parallel to the applied force. 7, record 6, English, - precessional%20motion
Record number: 6, Textual support number: 1 CONT
Gyroscopic precession... When force is applied to a gyro, the device reacts as if the force had been applied at a point 90 degrees from the point of actual application, in the direction of rotation. Precession affects propellers, which act like gyros, and gyro instruments. Its principle effect is on the heading indicator, which tends to drift over time. 8, record 6, English, - precessional%20motion
Record number: 6, Textual support number: 2 CONT
A gyroscope will not only resist being moved out of its vertical position, it will also generate force as it attempts to travel in large, circular patterns. These patterns are most easily seen with a spinning top. As the top begins losing its energy, it never simply spirals straight down in the same direction that it was originally spinning. As it destabilizes, it will always begin slowly rotating or precessing in a slow, even circle that is in the opposite direction to its normal spinning motion. These circular patterns are known as "precessional" motions, and they are another aspect of a gyroscope’s movement that will occur either in air or in a vacuum and can be used to overcome gravity. 9, record 6, English, - precessional%20motion
Record number: 6, Textual support number: 3 CONT
If an airplane changes suddenly from a nose up to a nose down position, as is the case during the take-off roll in a tail wheel airplane, the airplane will yaw sharply to the left as the pilot shoves the wheel forward to raise the tail. The application of right rudder compensates for the precession tendency. 7, record 6, English, - precessional%20motion
Record 6, French
Record 6, Domaine(s)
- Mécanique générale (Physique)
- Instruments et équipement de bord (Constructions aéronautiques)
- Lancement et manœuvres dans l'espace
- Hélicoptères (Militaire)
Record 6, Main entry term, French
- précession
1, record 6, French, pr%C3%A9cession
correct, feminine noun
Record 6, Abbreviations, French
Record 6, Synonyms, French
- mouvement de précession 2, record 6, French, mouvement%20de%20pr%C3%A9cession
correct, masculine noun
- précession gyroscopique 3, record 6, French, pr%C3%A9cession%20gyroscopique
correct, feminine noun
- précession du gyroscope 4, record 6, French, pr%C3%A9cession%20du%20gyroscope
correct, feminine noun
Record 6, Textual support, French
Record number: 6, Textual support number: 1 DEF
Tendance qu'a un corps en rotation, sur lequel on applique une force perpendiculairement à son axe de rotation, de tourner 90 degrés par rapport à son axe de rotation, dans le même sens que la rotation, pour finir sur un nouveau plan de rotation parallèle à la force appliquée. 5, record 6, French, - pr%C3%A9cession
Record number: 6, Textual support number: 1 CONT
Si l'on applique un couple à un gyroscope en rotation, couple appliqué sur un axe différent de son axe de rotation, il réagit à ce couple de manière à amener son axe de rotation parallèle à celui du couple appliqué, et ceci par le plus court chemin. Ce mouvement est dit «mouvement de précession» lorsqu'il est provoqué volontairement, et «dérive» lorsqu'il est dû à un élément perturbateur. 6, record 6, French, - pr%C3%A9cession
Record number: 6, Textual support number: 2 CONT
Mouvement de précession stable d'un gyroscope. 7, record 6, French, - pr%C3%A9cession
Record number: 6, Textual support number: 1 OBS
L'usage fait donner des appellations différentes à cette composante de rotation instantanée [...] : lorsqu'elle est due à un phénomène déterministe et connu, on l'appelle «précession gyroscopique»; lorsqu'elle est due à un phénomène aléatoire, ou bien que l'on ne maîtrise pas, on l'appelle «dérive gyroscopique». 8, record 6, French, - pr%C3%A9cession
Record number: 6, Textual support number: 2 OBS
précession; précession gyroscopique : termes d'usage obligatoire au Bureau de la traduction du Canada. 9, record 6, French, - pr%C3%A9cession
Record number: 6, Textual support number: 1 PHR
Précession astronomique, précession de déplacement, précession instrumentale, précession mécanique. 10, record 6, French, - pr%C3%A9cession
Record 6, Spanish
Record 6, Campo(s) temático(s)
- Mecánica general (Física)
- Instrumentos y equipo de vuelo (Industria aeronáutica)
- Lanzamiento y maniobras en el espacio
- Helicópteros (Militar)
Record 6, Main entry term, Spanish
- precesión
1, record 6, Spanish, precesi%C3%B3n
correct, feminine noun
Record 6, Abbreviations, Spanish
Record 6, Synonyms, Spanish
- precesión giroscópica 2, record 6, Spanish, precesi%C3%B3n%20girosc%C3%B3pica
correct, feminine noun
Record 6, Textual support, Spanish
Record number: 6, Textual support number: 1 DEF
Movimiento cónico de rotación, en torno de una posición media, que toma en el espacio el eje de los cuerpos que giran sobre sí mismos con movimiento giroscópico. 1, record 6, Spanish, - precesi%C3%B3n
Record 7 - internal organization data 2003-01-10
Record 7, English
Record 7, Subject field(s)
- Skydiving, Paragliding and Hang Gliding
- Special-Language Phraseology
Record 7, Main entry term, English
- parachuting session
1, record 7, English, parachuting%20session
correct
Record 7, Abbreviations, English
Record 7, Synonyms, English
Record 7, Textual support, English
Record number: 7, Textual support number: 1 CONT
... the WDI(wind drift indicator) is normally dropped at the beginning of any parachuting session... 1, record 7, English, - parachuting%20session
Record 7, French
Record 7, Domaine(s)
- Parachutisme, parapente et deltaplane
- Phraséologie des langues de spécialité
Record 7, Main entry term, French
- session de saut en parachute
1, record 7, French, session%20de%20saut%20en%20parachute
proposal, feminine noun
Record 7, Abbreviations, French
Record 7, Synonyms, French
Record 7, Textual support, French
Record 7, Spanish
Record 7, Textual support, Spanish
Record 8 - internal organization data 2001-08-30
Record 8, English
Record 8, Subject field(s)
- Flight Instruments and Equipment (Aeroindustry)
- Aircraft Piloting and Navigation
- Navigation Instruments
- Launching and Space Maneuvering
Record 8, Main entry term, English
- unbalanced
1, record 8, English, unbalanced
correct
Record 8, Abbreviations, English
Record 8, Synonyms, English
- unsymmetrical 2, record 8, English, unsymmetrical
Record 8, Textual support, English
Record number: 8, 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 8, English, - unbalanced
Record number: 8, Textual support number: 2 CONT
Unsymmetrical gyroscope. 2, record 8, English, - unbalanced
Record number: 8, 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 8, English, - unbalanced
Record 8, French
Record 8, Domaine(s)
- Instruments et équipement de bord (Constructions aéronautiques)
- Pilotage et navigation aérienne
- Instruments de navigation
- Lancement et manœuvres dans l'espace
Record 8, Main entry term, French
- balourdé
1, record 8, French, balourd%C3%A9
correct
Record 8, Abbreviations, French
Record 8, Synonyms, French
- dyssymétrique 2, record 8, French, dyssym%C3%A9trique
Record 8, Textual support, French
Record number: 8, 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 8, French, - balourd%C3%A9
Record number: 8, Textual support number: 2 CONT
Gyroscope balourdé. 4, record 8, French, - balourd%C3%A9
Record number: 8, 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 8, French, - balourd%C3%A9
Record 8, Spanish
Record 8, Textual support, Spanish
Record 9 - internal organization data 2001-06-22
Record 9, English
Record 9, Subject field(s)
- General Mechanics (Physics)
- Aircraft Piloting and Navigation
- Navigation Instruments
- Flight Instruments and Equipment (Aeroindustry)
Record 9, Main entry term, English
- precession re-adjustment
1, record 9, English, precession%20re%2Dadjustment
correct
Record 9, Abbreviations, English
Record 9, Synonyms, English
Record 9, Textual support, English
Record number: 9, Textual support number: 1 CONT
A significant advantage of the HI (heading indicator) over the magnetic compass is its steadiness in turbulence and various aircraft movements... the compass have several errors introduced during turns, acceleration and deceleration. The HI is unaffected by these maneuvers and by turbulence, and is a reliable instrument as long as the precession re-adjustment is made in timely fashion. 1, record 9, English, - precession%20re%2Dadjustment
Record number: 9, Textual support number: 1 OBS
Gyroscopic precession. The reaction of a gyro when a force is applied to the spinning wheel. When force is applied to a gyro, the device reacts as if the force had been applied at a point 90 degrees from the point of actual application, in the direction of rotation. Precession affects propellers, which act like gyros, and gyro instruments. Its principle effect is on the heading indicator, which tends to drift over time. 2, record 9, English, - precession%20re%2Dadjustment
Record 9, French
Record 9, Domaine(s)
- Mécanique générale (Physique)
- Pilotage et navigation aérienne
- Instruments de navigation
- Instruments et équipement de bord (Constructions aéronautiques)
Record 9, Main entry term, French
- correction de l'erreur de précession
1, record 9, French, correction%20de%20l%27erreur%20de%20pr%C3%A9cession
feminine noun
Record 9, Abbreviations, French
Record 9, Synonyms, French
Record 9, Textual support, French
Record number: 9, Textual support number: 1 OBS
Erreur de précession. Les forces de friction présentes dans le système gyroscopique engendrent la précession. Cette précession occasionne un «glissement» ou une «dérive» d'environ 3 degrés dans la lecture de l'instrument et ce, à toutes les 15 minutes. Le gyroscope est aussi sujet à la précession apparente. L'inertie gyroscopique garde le gyroscope fixe dans l'espace de sorte qu'il ne bouge pas par rapport à l'espace. Cependant, la terre qui tourne en dessous du gyroscope donne à ce dernier un mouvement apparent par rapport à la terre. La rotation de la terre cause une dérive apparente, ou précession, qui varie avec la latitude [...] L'erreur de précession, à la fois mécanique et apparente, doit être corrigée à intervalles réguliers, c.-à-d. toutes les 15 minutes. 2, record 9, French, - correction%20de%20l%27erreur%20de%20pr%C3%A9cession
Record 9, Key term(s)
- correction des erreurs de précession
- correction de la précession
Record 9, Spanish
Record 9, Textual support, Spanish
Record 10 - internal organization data 2001-06-21
Record 10, English
Record 10, Subject field(s)
- Flight Instruments and Equipment (Aeroindustry)
- Aircraft Piloting and Navigation
- Navigation Instruments
Record 10, Main entry term, English
- slaving
1, record 10, English, slaving
correct
Record 10, Abbreviations, English
Record 10, Synonyms, English
Record 10, Textual support, English
Record number: 10, Textual support number: 1 DEF
The use of a torquer to maintain the orientation of the spin axis relative to an external reference, such as a pendulum or magnetic compass. 2, record 10, English, - slaving
Record number: 10, Textual support number: 1 CONT
The free gyro... can be converted to a directional reference by remounting its case with the spin axis horizontal and the indicator axis vertical. The indicator will then give the airplane's heading. Gyro drift is countered by slaving the instrument to the Earth's magnetic field, via either a separate magnetic compass or a flux valve device. 3, record 10, English, - slaving
Record 10, French
Record 10, Domaine(s)
- Instruments et équipement de bord (Constructions aéronautiques)
- Pilotage et navigation aérienne
- Instruments de navigation
Record 10, Main entry term, French
- asservissement
1, record 10, French, asservissement
correct, masculine noun
Record 10, Abbreviations, French
Record 10, Synonyms, French
Record 10, Textual support, French
Record number: 10, Textual support number: 1 DEF
Action de mettre un mécanisme sous la dépendance d'un organe régulateur qui, actionné par des appareils commandés, réagit sur le circuit de commande en vue d'imposer à l'ensemble certaines conditions. 2, record 10, French, - asservissement
Record number: 10, Textual support number: 1 OBS
Sur les petits appareils comme le Cessna 182RG, le pilote règle le conservateur de cap pour qu'il coïncide avec le compas avant le décollage, et le réajuste périodiquement pendant le vol pour être sûr qu'il reste synchronisé avec le compas. Le conservateur de cap dérive parce qu'il est basé sur un gyroscope, sujet avec le temps à la précession. En règle générale, le conservateur de cap ne doit pas dériver de plus de 3 degrés toutes les 15 minutes. Les appareils plus importants sont équipés de conservateurs de cap asservis qui maintiennent l'instrument correctement aligné avec le compas. 3, record 10, French, - asservissement
Record 10, Spanish
Record 10, Textual support, Spanish
Record 11 - internal organization data 2001-06-21
Record 11, English
Record 11, Subject field(s)
- General Mechanics (Physics)
- Astrophysics and Cosmography
- Chemistry
- Aircraft Piloting and Navigation
Record 11, Main entry term, English
- precess
1, record 11, English, precess
correct, verb
Record 11, Abbreviations, English
Record 11, Synonyms, English
Record 11, Textual support, English
Record number: 11, Textual support number: 1 CONT
If the gyroscope were a perfect instrument, it would be possible to determine the position of a satellite or a space vehicle with respect to its own fixed axes. But a gyroscope precesses... A very good gyroscope only precesses a few thousandths of a degree of arc in an hour, but at the end of a week the error is about one degree and it is twenty-five degrees at the end of six months. 2, record 11, English, - precess
Record number: 11, Textual support number: 2 CONT
The HI [heading indicator] gyroscope may precess in small amounts over time. Therefore, the HI should be checked against the compass in 15 minute intervals. 3, record 11, English, - precess
Record number: 11, Textual support number: 1 OBS
Gyroscopic precession. The reaction of a gyro when a force is applied to the spinning wheel. When force is applied to a gyro, the device reacts as if the force had been applied at a point 90 degrees from the point of actual application, in the direction of rotation. Precession affects propellers, which act like gyros, and gyro instruments. Its principle effect is on the heading indicator, which tends to drift over time. 4, record 11, English, - precess
Record number: 11, Textual support number: 2 OBS
precession: A comparatively slow gyration of the rotation axis of a spinning body about another line intersecting it so as to describe a cone. 5, record 11, English, - precess
Record 11, French
Record 11, Domaine(s)
- Mécanique générale (Physique)
- Astrophysique et cosmographie
- Chimie
- Pilotage et navigation aérienne
Record 11, Main entry term, French
- précessionner
1, record 11, French, pr%C3%A9cessionner
correct, see observation
Record 11, Abbreviations, French
Record 11, Synonyms, French
- précesser 2, record 11, French, pr%C3%A9cesser
see observation
Record 11, Textual support, French
Record number: 11, Textual support number: 1 CONT
Comment pointer les gyros ?: [...] il suffit de commander les couples adéquats pour faire précessionner S2 en [phi] et [psi], jusqu'au bon alignement sur l'étoile choisie. 3, record 11, French, - pr%C3%A9cessionner
Record number: 11, Textual support number: 2 CONT
[...] une roue de vélo soutenue à une extrémité de son axe précessionne à l'horizontale. 4, record 11, French, - pr%C3%A9cessionner
Record number: 11, Textual support number: 3 CONT
Le proton va donc précesser en décrivant un cône parallèle ou antiparallèle selon son niveau d'énergie. 5, record 11, French, - pr%C3%A9cessionner
Record number: 11, Textual support number: 4 CONT
Dans un virage dérapé, le gyroscope «précesse» du côté du virage. Une fois l'avion revenu au vol rectiligne en palier, l'instrument indique un virage dans la direction du dérapage. Dans un virage normal, le gyroscope «précesse» du côté du virage. Le mécanisme de redressement du gyroscope corrige rapidement l'erreur de précession. 6, record 11, French, - pr%C3%A9cessionner
Record number: 11, Textual support number: 5 CONT
[...] on peut montrer en mécanique qu'un gyroscope soumis à un moment de force (par exemple, une toupie inclinée reposant sur sa pointe et soumise à son poids) précesse, c'est-à-dire que son axe de rotation décrit un cône en une période beaucoup plus longue que celle de sa rotation propre. 7, record 11, French, - pr%C3%A9cessionner
Record number: 11, Textual support number: 1 OBS
précession : Mécanique physique. Mouvement conique décrit, autour d'une position moyenne, par l'axe de rotation propre d'un corps animé d'un mouvement gyroscopique. 8, record 11, French, - pr%C3%A9cessionner
Record number: 11, Textual support number: 2 OBS
précesser; précessionner : À ce jour (2000), les deux termes ne sont pas répertoriés dans les dictionnaires courants; cependant, les deux formes sont largement attestées dans les textes les plus pointus sur Internet, avec un léger avantage pour «précesser». L'usage ne semble pas avoir tranché en faveur de l'un ou de l'autre. On pourrait penser cependant que la forme «précessionner» est plus conforme aux principes de création par dérivation en français. 9, record 11, French, - pr%C3%A9cessionner
Record 11, Spanish
Record 11, Textual support, Spanish
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