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POSITION APPROXIMATE [11 records]

Record 1 2017-10-17

English

Subject field(s)
  • Aircraft Propulsion Systems
CONT

The term feathering refers to the operation of rotating the blades of a propeller to an edge-to-the-wind position for the purpose of stopping the rotation of the propeller whose blades are thus feathered and to reduce drag. Therefore, a feathered blade is an approximate in-line-of-flight position, streamlined with the line of flight. Some, but not all, propellers can be feathered. Feathering is necessary when an engine fails or when it is desirable to shut off an engine in flight. The pressure of the air on the face and back of the feathered blade is equal, and the propeller will stop rotating. If it is not feathered when its engine stops driving it, the propeller will "windmill" and cause drag.

OBS

feathering: term officially approved by the International Civil Aviation Organization (ICAO).

Key term(s)
  • feathering operation

French

Domaine(s)
  • Propulsion des aéronefs
CONT

La mise en drapeau est assurée par le moteur de changement de calage lui-même.

OBS

mise en drapeau : terme uniformisé par l'Organisation de l'aviation civile internationale (OACI).

Key term(s)
  • manœuvre de drapeau
  • passage en drapeau

Spanish

Campo(s) temático(s)
  • Sistemas de propulsión de aeronaves
OBS

puesta en bandera : término aceptado oficialmente por la Organización de Aviación Civil Internacional (OACI).

Save record 1

Record 2 2015-02-24

English

Subject field(s)
  • Aircraft Propulsion Systems
DEF

A propeller the blades of which have been rotated so that the leading and trailing edges are nearly parallel with the aircraft flight path to stop or minimize drag and engine rotation.

CONT

The term "feathering" refers to the operation of rotating the blades of a propeller to an edge-to-the-wing position for the purpose of stopping the rotation of the propeller whose blades are thus feathered and to reduce drag. Therefore, a feathered blade is in an approximate in-line-of-flight position, streamlined with the line of flight. Some, but not all, propellers can be feathered. Feathering is necessary when an engine fails or when it is desirable to shut off an engine in flight. The pressure of the air on the face and back of the feathered blade is equal, and the propeller will stop rotating. If it is not feathered when its engine stops driving it, the propeller will "windmill" and cause drag. Another advantage of being able to feather a propeller is that a feathered propeller creates less resistance(drag) and disturbance to the flow of air over the wings and tail of the airplane.

OBS

feathered propeller: term and definition standardized by the Glossary for Pilots and Air Traffic Services Personnel Committee; term officially approved by the International Civil Aviation Organization (ICAO).

French

Domaine(s)
  • Propulsion des aéronefs
DEF

Hélice dont les pales ont été tournées de manière à ce que les bords d'attaque et de fuite soient presque parallèles à la trajectoire de vol pour réduire ou éliminer la traînée et la vitesse de rotation du moteur.

CONT

Si l'on fait pivoter les pales au-delà de la position normale de grand pas jusqu'à ce que la corde soit parallèle à la direction du vol, de façon à présenter la résistance minimale, on dit que l'hélice est en drapeau. Cette position des pales est particulièrement utile sur un multimoteur, car elle permet de réduire la traînée de l'hélice d'un moteur en panne. Elle offre aussi un moyen commode d'arrêter une hélice et de l'empêcher de tourner «en moulinet»; cela réduit le risque d'aggraver les dommages d'un moteur ayant subi un bris mécanique.

OBS

hélice en drapeau : terme et définition normalisés par le Comité sur le Glossaire à l'intention des pilotes et du personnel des services de la circulation aérienne; terme uniformisé par l'Organisation de l'aviation civile internationale (OACI).

Spanish

Campo(s) temático(s)
  • Sistemas de propulsión de aeronaves
CONT

[...] si un motor se para en el aire, el piloto orienta las palas de la hélice en su posición de mínima resistencia al aire (hélice bandera).

OBS

hélice en bandera: término aceptado oficialmente por la Organización de Aviación Civil Internacional (OACI).

Save record 2

Record 3 2013-10-11

English

Subject field(s)
  • Signalling and Illumination (Air Transport)
  • Air Navigation Aids
CONT

A direction sign has a black inscription on a yellow background and is used to identify the intersecting taxiways toward which an aircraft is approaching. The sign is, whenever possible, positioned to the left-hand side of the taxiway and prior to the intersection. A direction sign will always contain arrows to indicate the approximate angle of intercept. Direction signs are normally used in combination with location signs to provide the pilot with position information.

French

Domaine(s)
  • Signalisation (Transport aérien)
  • Aides à la navigation aérienne
CONT

Panneau de direction : Ce type de panneau porte, en noir sur fond jaune, une inscription qui annonce une intersection de voies de circulation dont s’approche un aéronef. Chaque fois que possible, le panneau est placé du côté gauche de la voie de circulation et avant l’intersection. Il contient toujours des flèches pour indiquer l’angle approximatif de l’intersection. Généralement, un panneau de positionlui est adjoint pour confirmer la position de l’aéronef.

Spanish

Save record 3

Record 4 2003-10-27

English

Subject field(s)
  • Chronology
  • Geology
DEF

A specific or approximate position on the geologic time scale of a past geologic event.

French

Domaine(s)
  • Chronologie
  • Géologie
DEF

Emplacement précis ou approximatif sur l'échelle géologique d'un événement géologique passé.

Spanish

Save record 4

Record 5 2001-09-03

English

Subject field(s)
  • Symptoms (Medicine)
DEF

A clinical test of co-ordination and position or joint sense in the upper limbs : the patient is asked to approximate the tips of both index fingers in space.

French

Domaine(s)
  • Symptômes (Médecine)

Spanish

Save record 5

Record 6 2000-07-11

English

Subject field(s)
  • Prostheses
  • The Eye
DEF

A lens placed in the posterior chamber, between the iris and posterior lens capsule, in the approximate position of the removed crystalline lens, following cataract surgery.

French

Domaine(s)
  • Prothèses
  • Oeil
OBS

Lentille de chambre postérieure : base de données Pascal.

Spanish

Save record 6

Record 7 1999-11-03

English

Subject field(s)
  • Boring and Drilling (Mines)
  • Geological Research and Exploration
  • Oil Drilling
DEF

A crude map used in the field, showing the approximate position of the structures.

French

Domaine(s)
  • Sondage et forage miniers
  • Recherches et prospections géologiques
  • Forage des puits de pétrole
DEF

[Carte] utilisée en forage et montrant la position approximative des structures.

Spanish

Save record 7

Record 8 1997-09-17

English

Subject field(s)
  • Maneuvering of Ships
OBS

Enables the satellite navigator to compute a satellite fix anywhere in the world when the approximate position is not known to within 60 miles.

Key term(s)
  • auto locate
  • auto-locate

French

Domaine(s)
  • Manœuvre des navires

Spanish

Save record 8

Record 9 1996-11-25

English

Subject field(s)
  • Hydrology and Hydrography
DEF

A rod with a weight at the bottom so that it floats in a vertical position; it gives the approximate mean velocity of the water between the bottom of the rod and the water surface; usually timed through a "float run".

OBS

velocity rod; rod-float: standardized by ISO.

Key term(s)
  • rod float

French

Domaine(s)
  • Hydrologie et hydrographie
DEF

Bâton flottant lesté à sa base de façon qu'il se déplace dans le courant en position presque verticale; la partie immergée du bâton peut être de longueur réglable.

OBS

bâton lesté; bâton de vitesse; perche flottante : normalisés par l'ISO.

Spanish

Campo(s) temático(s)
  • Hidrología e hidrografía
DEF

Barra flotante con un lastre en su base de manera que se desplaza en una posición casi vertical; la porción sumergida puede ser regulable.

Save record 9

Record 10 1984-06-01

English

Subject field(s)
  • Water Transport

French

Domaine(s)
  • Transport par eau

Spanish

Save record 10

Record 11 1976-06-19

English

Subject field(s)
  • Telecommunications

French

Domaine(s)
  • Télécommunications
OBS

(aviation) Histoire 109, p. 548

Spanish

Save record 11

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