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SERVOCOMMANDE DIRECTION [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2011-04-18

English

Subject field(s)
  • Aeronautical Engineering and Maintenance
CONT

The rudder actuator is a tandem actuator, having two internal piston areas for each hydraulic source (A & B). The actuator is capable of positioning the rudder panel with either one or both main hydraulic sources available, though with one source inoperative a reduced rudder panel deflection would result due to blowdown at higher airspeeds. Flow of hydraulic fluid to the rudder actuator is controlled by the dual servo-valve. This is a complex dual concentric cylinder with an outer and inner slide. During normal rudder pedal inputs sufficient rudder panel deflection is catered for by the primary (inner) valve alone. However, should a larger panel deflection be required or a higher rate rudder input be commanded, the secondary (outer) sleeve moves in addition to port extra fluid to the actuator. Movement of the outer sleeve is typically no more than 1 mm. Position of both sleeves of the servo valve is controlled by a complex mechanism of bell cranks, input rod and summing lever, the geometry of which is such as to provide movement of the sleeves in relation to the body of the valve.

OBS

Equivalent found on a cutaway diagram of a Boeing 767.

OBS

rudder actuator: term standardized by ISO.

French

Domaine(s)
  • Aérotechnique et maintenance
OBS

servocommande de direction : terme normalisé par l'ISO; vérin de direction: terme uniformisé par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Maintenance.

Spanish

Save record 1

Record 2 1987-05-22

English

Subject field(s)
  • Helicopters (Military)
  • Flight Instruments and Equipment (Aeroindustry)
OBS

Term officialized by the ATSC - Helicopters.

French

Domaine(s)
  • Hélicoptères (Militaire)
  • Instruments et équipement de bord (Constructions aéronautiques)
OBS

Terme uniformisé par le CUTA - Hélicoptères.

Spanish

Save record 2

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