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.
 


Arrestor Barrier System

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.
The energy absorption (max. 13.5 million Joules) in this system is based on water twister technology. This arrester barrier system can arrest the fighter aircraft of 20 ton to 40 ton at a speed of 160 knots. The aircraft stops after a run out distance of 270 m after engagement in the system. Clearance for service-use of barrier has been accorded by Centre for Military Airworthiness & Certification.