ARRESTOR BARRIER SYSTEM
Arrester barrier is a system installed at the end of the runway to stop the
forward movement of an aircraft overshooting the runway, in case of a
rejected take off or emergency landing, with minimal damage to aircraft or
injury to the crew. Availability of the system is, therefore, an essential
requirement for flying operations. Indian Air Force (IAF) has arrester
barrier at all of their bases for aircrafts up to 20.4 ton mass (MiG,
Jaguar, Mirage, Kiran, etc). The induction of SU-30 aircraft in IAF
necessitated the need of arrestor barriers for 40 ton class aircraft since
the existing barriers cannot be used for more than 20.4 ton class aircraft.
DRDO has successfully developed arrestor barriers for 40 ton class aircraft.
The barrier is raised with
the help of stanchion system on a command received through remote control
located in ATC tower, when emergency arresting of an aircraft is required.
As the net envelopes the aircraft, the pull exerted on the net releases the
net bottom from the net anchors and breaks the shear pins in the shear-off
couplings, releasing the net top from the suspension system. The purchase
tapes attached to the net end loops are pulled through the fair-lead tubes
paying out the two energy absorber tape drums, thereby turning the rotary
hydraulic brakes. This action generates a uniform braking force, which
smoothly decelerates the aircraft to a safe stop.