IR-detector 71 N


IR-detector 71 N


Heavily heat-stressed, the ill-detector converted electrical signals, which were fed into aiming calculators and presented to the driver in the form of a dot.

The IR-detector was to complement the reconnaissance radarPS-011 and fully integrated with the radar antenna system.


The IR detector was licensed built and supplied by LM Ericsson.


J 35F (was produced between years 1967-1972) was equipped with the R-tracker.


The IR detector with target seeker was located under the nose of the aircraft and its other auxiliary devices were located to the left under the shell plate in the rear fuselage of the aircraft.


A chiller for cooling the seeker's detector was manufactured by Westinghouse.


The IR detector operated in the 3.2-4.7 micrometer wavelength range.


The task was to convey relevant mine movements in the event of radar interference and/or at low flight altitude to the radar for input to radar sight 7B when firing with Hunting Robots RB27 and RB28.


The equipment allowed scanning in various reconnaissance programs as well as for target tracking in the side and height.

The target seeker's working area was 120 degrees in the lateral plane and 60 degrees in the height plane.


The driver's controls were located on the radar panel, hand control and weapon panel in the cabin and were manufactured by Saab.


The target shot was presented during reconnaissance on the radar's Indicator type B which indicated the direction to the target and in the tracking program the target information via the radar sight was supplemented with guidance information to the optimal firing point on the radar indicator type F.


Electronic radar jamming does not affect the function of the IR detector and the target aircraft cannot detect that the fighter aircraft has IR contact as the system does not send out any electronic signals.