Fly by Light in Aeroplanes Systems - Analysis

Fibre optic cables are widely used in telecommunication and network. It is known for its properties which is lighter than standard copper cable, able to bring multiple signals in single cable, no electric current mixed up in cable television, cheaper than copper cable connection because it is made from silica (goblet), and does not

List of abbreviations

  1. FBW- Fly-by-Wire
  2. FBL- Fly-by-Light


At the first level of aviation, airplane utilized wires and pulleys for control buttons also called mechanised linkage. This wires and pulleys become pull and press system to go the trip control's surfaces at the expense of the pilot's effort. Utilizing the cords and pulleys, every causes work on the airline flight control surfaces are being transmitted to the cockpit control and believed straight by the pilots that they have to counter these causes using their own strength without any assistance. Early plane were compact and the plane can only take a flight at a slower acceleration thus aerodynamic push is not strong so that it is possible to manoeuvres the aeroplanes.

With new appearing technology and conflict in those days, air superiority is becoming an advantage. Aircraft needs to fly faster, hold more payload and strong. This is when hydraulic systems plays an important role in airplane control system. By using hydraulic systems, aeroplanes can travel faster because of the pilot does not have to put extra effort to move the control areas with increasing aerodynamic forces. Hydro-mechanical control system is a system which mechanised linkages are connected to the hydraulic system. This technique utilized wires, pulleys, and gears at the cockpit control and hydraulic system consist of pipes, reservoir, valves and pushes at the control surfaces. With hydro-mechanical system, the aerodynamic forces acting on the control surfaces are not noticed by the pilots rendering it easy to settings. Stay shaker and artificial feedback are the methods to replicate the aerodynamic makes acting on the control floors to the cockpit control. It had been to ensure that the pilot does not manoeuvre the aeroplanes beyond its limitation.

Although the hydro-mechanical system provides plenty benefits to the pilot, it was deemed as heavy, hard to maintain and not sensible for larger airplane as the cords would need to run over a long distance of aircraft fuselage.

Commercial airplane nowadays are bigger, faster and fly higher than before. Hydro-mechanical control system may not able to hold the complicated and hypersensitive controls made for passenger's comfort. Nowadays, majority commercial airliners use Fly-by-Wire system. FBW system replaces the cords, pulleys and gears with copper wires which carries electrical impulses from the cockpit control to the control surfaces. FBW get rid of the needs to keep up with the cords, pulleys or the gears thus lowering weight of the airplane. FBW is very useful due to it being electronically control by pcs which take care of the autopilot system and aeroplanes system.

Although FBW is recognized as your best option available today, it is still must be upgrade. Copper line can only hold one signal for every wire which means for an individual system that may needs four signs, it requires four copper wires. Because of this nature, typical airplane with FBW will have a bundles of copper wiring as well as for maintenance side, dealing with bundles of wires does take time and whole lot of manpower. FBW system is still regarded as heavy because of the amount of copper cords included and caging due to susceptible to electromagnetic rate of recurrence.

Fly-by-Light is a technology that might be the solution for future aeroplanes development. FBL technology is not a new thing but the research is slowly and gradually improvement as it still being tested and research because the 90's. Although FBL may not be implemented in forseeable future but the concept have been use in the current inflight entertainment system which utilised fibre optic cable television to accommodate all passenger's desire.


In the world of aviation, safety comes first, earnings comes second and followed by everything else. The info gather in this analysis might verify that FBL has prospect of future aeroplanes development. Aeroplanes manufacturers and aviation providers such as flight companies and private industries always be consider more reliable airplane, weight-fuel keeping and easy to maintain. This study will prove whether it is possible or never to repla