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GYRO STEERING [2 records]

Record 1 2002-07-16

English

Subject field(s)
  • Astrophysics and Cosmography
  • Navigation Instruments
  • Aircraft Piloting and Navigation
CONT

From 1954-56 Greenaway served with the USAF Strategic Air Command on many arctic Flights aboard B47 and B52 aircraft. At this time he worked on gyro steering techniques and developing the Earth Convergency Grid which was put to civil use by Scandinavian Airline System on their trans polar flights.

CONT

RTW [residual transport wander] is the difference between Earth convergency (EC) and map convergency (MC), however it is expressed as a rate since the error depends also upon the vehicle velocity. Therefore the average RTW rate is a function of earth convergency, map convergency and elapsed time.

French

Domaine(s)
  • Astrophysique et cosmographie
  • Instruments de navigation
  • Pilotage et navigation aérienne
CONT

La déviation apparente résiduelle (R.T.W.) est la différence entre la convergence de la Terre et la convergence sur la carte; cependant elle est exprimée en taux, puisque cette erreur dépend aussi de la vitesse du véhicule. Alors le taux moyen de la déviation apparente résiduelle dépend de la convergence de la Terre, la convergence sur la carte et aussi du temps écoulé.

CONT

Sur une carte, on a relevé au point A une inclinaison grille de 22,5° et au point B une inclinaison grille de 5,5°. Entre ces deux points la convergence terrestre est de 19°.

Spanish

Save record 1

Record 2 2001-06-22

English

Subject field(s)
  • Flight Instruments and Equipment (Aeroindustry)
  • Aircraft Piloting and Navigation
  • Navigation Instruments
CONT

Any spinning object posesses gyroscopic characteristics. The central mechanism of the gyroscope is a wheel similar to a bicycle wheel. It’s outer rim has a heavy mass. It rotates at high speed on very low friction bearings. When it is rotating normally, it resists changes in direction. The gyroscope exhibits two predominant characteristics. Rigidity in space. Precession.

CONT

The gyro has been applied as a controller in the steering systems of ships, planes, and torpedos. In these applications, the important gyroscopic characteristic being used is rigidity in space, i. e. the spinning gyroscope maintains it orientation in space.

Key term(s)
  • gyroscopic characteristics

French

Domaine(s)
  • Instruments et équipement de bord (Constructions aéronautiques)
  • Pilotage et navigation aérienne
  • Instruments de navigation
CONT

De façon générale, les gyrovibrants sont des systèmes mécaniques dont certains modes de vibration présentent des propriétés de type gyroscopique. Dans le travail en cours, on s'intéresse plus particulièrement aux gyrovibrants dont le système mécanique sous-jacent est constitué par une coque mince. [...] Plus spécifiquement, les objectifs sont de 1.Mieux comprendre les phénomènes mécaniques qui sont à la base des propriétés gyroscopiques des gyrovibrants en général, et des coques résonnantes en particulier; [...]

Key term(s)
  • propriétés gyroscopiques

Spanish

Save record 2

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