❑Introduction
• Characteristics vary greatly depending on the type of aircraft
flown.
• The most basic flight control system designs are mechanical
and date back to early aircraft.
• They operate with a collection of mechanical parts such as
rods, cables, pulleys, and sometimes chains to transmit the
forces of the flight deck controls to the control surfaces.
• Mechanical flight control systems are still used today in small
general and sport category aircraft where the aerodynamic
forces are not excessive. [Figure 1]
, Flight control Systems
Figure 1:mechanical Flight control system
,Flight Control Systems( Hydro-mechanical flight control)
, 2.1 Flight control systems (FCS)
❑ Introduction to automatic flight control
• An aircraft autopilot with many features and various
autopilot related systems integrated into a single system
is called an automatic flight control system (AFCS)
• In the early days of flying, the FCS was mechanical. By means
of cables and pulleys, the control surfaces of the aircraft were
given the necessary deflections to control the aircraft.
• Currently, a modern technique, fly-by-wire FCS is used. In
this system electrical signals are sent to the control surfaces.
The signals are sent by the flight (control) computer
(FC/FCC).