![]() ![]() Primary flight control capability is essential for safety, and this aspect is dramatically emphasized in the modern unstable (military) airplanes, which could be not controlled without the continued operation of the primary flight control surfaces. ![]() canards, with additional pitch control and stabilization.swing wings, with an articulation that allows sweep angle variation.tailerons, or stabillisers-ailerons (independently controlled).flaperons, or trailing edge flaps-ailerons extended along the entire span:.elevons on delta wings, for pitch and roll control, if there is no horizontal tail.Modern aircraft have often particular configurations, typically as follows: pitch, roll and yaw control, basically obtained by deflection of elevators, ailerons and rudder (and combinations of them) those indicated in blue form the secondary flight control: high-lift and lift-dump devices, airbrakes, tail trimming, etc. Those indicated in red form the primary flight control, i.e. Aircraft have a number of different control surfaces: 6.1 shows the classic layout for a conventional airliner. The number and type of aerodynamic surfaces to be controlled changes with aircraft category. 6.1 – Flight control surfaces on airlinerĪ further evolution of the servo-assisted control is the fly-by-wire technique, based on signal processing of the pilot’s demand before conversion into actuator control. automatic stall and spinning protection įig.stabilisation and control of unstable airplanes, that have commonly higher performances.compensation for deficiencies in the aerodynamics of the basic airframe.One of the great additional effects after the introduction of servomechanisms is the possibility of using active control technology, working directly on the flight control actuators, for a series of benefits: Nowadays two great categories of flight control systems can be found: a full mechanical control on gliders and small general aviation, and a powered, or servo-assisted, control on large or combat aircraft. The introduction of larger airplanes and the increase of flight envelopes made the muscular effort of the pilot, in many conditions, not sufficient to contrast the aerodynamic hinge moments consequent to the surface deflection the first solution to this problem was the introduction of aerodynamic balances and tabs, but further grow of the aircraft sizes and flight enveops brought to the need of powered systems to control the articulated aerodynamic surfaces. This technique survived for decades and is now still used for small airplanes. Soon after the first flights, articulated surfaces were introduced for basic control, operated by the pilot through a system of cables and pulleys. The architecture of the flight control system, essential for all flight operations, has significantly changed throughout the years. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
December 2022
Categories |