primary flight controls

primary flight controls

Control surfaces that cause an airplane to rotate about its three primary axes. The primary flight controls are the ailerons, the elevators, and the rudder. See flight controls.
References in periodicals archive ?
Establishing a nose-up attitude to maximize braking is only one of the ways we can use the primary flight controls on the ground.
While servo bridal cable tensions are set during an autopilot installation, this doesn't mean the aircraft's primary flight controls were rigged.
Contract award: development of an innovative system for implementation of primary flight controls of an airplane with trainer function igc 4783504061.
Upon discovering both primary and secondary navigation systems were delivering incorrect, opposite indications, Lt Col Barnes and MSgt Austin Correctly deduced the faulty Primary Control Module, as well as the potential for further deterioration of aircraft systems with this malfunction, to include the landing gear and primary flight controls. Lt Col Barnes and MSgt Austin executed all applicable checklists, collaborated with the aircraft manufacturer's engineering division, and continued controllability and systems checks.
System 1 exclusively provides power to the primary flight controls. System 2 powers the primary flight controls, the speed brake, and non- flight-control items (the hook, refueling probe, nosewheel steering, anti-skid, normal brakes, and the landing gear).
The company's actuation systems plant in Wobaston Road, Wolverhampton - where the Boulton Paul Defiant fighter was built in World War Two - is a world leader in primary flight controls, thrust reverser actuation and high lift systems.
This AD would require the replacement of certain existing potentiometers with recently manufactured ones, the modification of the flexible couplers that attach the shafts of the potentiometers to the shafts of the primary flight controls, and the performance of repetitive calibration tests on the potentiometers.
Of these, the pitch trim system is of special importance because its proper (or improper) setting has a direct impact on the operation of the primary flight controls: the elevator, aileron and rudder.
The U-2 aircraft does not have hydraulically driven primary flight controls with a cable redundancy, and the loss of the elevator flight control cable would have prevented the pilot from maintaining lateral control of the aircraft.
It features three independent systems powering the primary flight controls and derives power from engine-driven, electrical and ram-air turbine pumps.
Conventional airplanes have three primary flight controls: ailerons to manage rolling about the longitudinal axis, elevators/stabilators to establish and maintain the desired pitch about the lateral axis, and a rudder to deal with any yawing moments around the vertical axis.
Common to both ADs is the requirement to verify proper balancing of the V-tail surfaces since they are even more sensitive to weight distribution than most primary flight controls. Installing "cuffs" on the ruddervators' leading edges served to eliminate much of the problem.--J.B.