• What is Fly By Wire and how does it work?.
• Why do we need FBW?.
• Where do we use it?.
• Future Developments
Introduced By NASA in the1970’s.
FBW was first developed for military aviation and
later came in to civil aviation.
Initially FBW was analogue and later developed in to
The supersonic Concorde was the first civil aircraft to
have an analogue Fly By Wire system.
What is FBW?.
It is a flight control system in which the control actions are
transmitted by wire.
The control parameters are carefully developed and validated in
order to produce maximum operational effect without compromising
safety and reliability.
This technology is designed to overcome the limitations of the
existing mechanical and hydro-mechanical flight control system.
How does it work?.
The concept uses a highly reliable computer and electronic
flight control system, rather than the conventional
mechanical or hydraulic-based systems, to stabilize and
maneuver an aircraft.
The computers “read” position and force inputs from the
pilot’s controls and aircraft sensors.
Computers solve differential equations to determine the
appropriate command signals that move the Control surfaces
to carry out the intentions of the pilot.
Why do we need it?.
Flight envelope protection.
Increase in stability and handling qualities( Possibility of flying
Turbulence suppression and consequent decrease in fatigue
loads (increased passenger comfort).
Weight and maintenance and overall cost reduction.
Reduction in pilot training cost(easier to fly and easier to
integrate autopilot facility ).
There is no Manual Override if there is a malfunction
of the computer.
There is no mechanical feedback to the pilot.
The impacts of these disadvantages is minimal because
A. Computer systems used in FBW has proved highly
reliable and safe operation.
B. Manufacturers have developed springs and linkages
which are computer controlled and give the pilots
the same feel as a conventional aircraft.
NASA Space shuttle
Used in civil aircrafts like Boeing 777 and
Airbus A320, Airbus A380 etc.
UAV’s and Stealth Helicopter (Comanche)
Used in the military for Advanced Fifth Generation
Fighters(F22-Raptor) and Bombers(B2).
Where do we use it?.
MORDERN AIRCRAFT USING THE DIGITAL FLY BY WIRE
Two new developments in the FBW will be
Fly By Wireless and
Fly By Optics
There are many derivatives of this technology in the automobile
Steer By Wire(NISSAN)
Brake By Wire(BREMBO-F1)
Drive By Wire
Fly By Wire is an extremely safe and reliable
technology which can be embraced. It is one of
the greatest breakthrough in the aviation history.
It has good scope of improvement over the
coming years and is definitely worth investing.