It should be mentioned that launching from maximum range on a maneuvering targets is not very
effective because the target can avoid the missile by performing a simple missile avoidance
maneuver. If the situation permits, wait until Rtr range is reached; this will greatly increase your
probability of kill. However, launching at, or over maximum range with launch override, can be used
to put the enemy on the defensive early.
In regards to SARH missile (R-27R, R-27ER) employment, it is required to maintain an STT lock on
the target during the missile’s entire time of flight. If the target breaks lock, and you are able to
quickly re-acquire lock, the missile will continue homing in on the target.
TO USE SARH MISSILES, YOU MUST LOCK THE TARGET IN STT MODE THE ENTIRE TIME OF MISSILE FLIGHT.
Missile Engagement with IRST as the Active Sensor
Using the "ОЛС-27" - infrared search and track (IRST) system for long-range missile combat allows
stealth attacks. The IRST is immune to active jamming, but it has much less target detection range
than radar. The R-27ET, R-27T and R-73 can all be used with the IRST system.
IRST works the in the infrared spectrum and detects targets by their thermal contrast. The "hottest"
aircraft section is the jet engines that expel hot gases and heat up the surrounding metal fuselage.
This is why infrared detection is more effective from the rear of the aircraft than the front.
Target information on the HUD is presented in the form of azimuth in the horizontal and target
elevation in the vertical. The IFF interrogator does not operate with the IRST, so be absolutely sure
that the target is an enemy aircraft before attacking.
Target acquisition, locking, and launching a missile consists of the following steps:
Step 1
To search for targets at long range, select the long range [2] mode, activate the IRST with the [O]
key and set the appropriate range scale on the HUD and HDD in km [+] and [-]. Select the best
missile for the range and target with the [D] key and confirm the selection on the HUD.
Step 2
Orient the radar azimuth scan zone in the direction of the target. On the Su-27 the azimuth scan
zone moves discretely and has three positions: central ±30 degrees, left –60 - 0 degrees and right 0
- +60 degrees. If the target is out of the central ±30 degrees zone, than it is required to move the
scan zone to the left or right by the [RShift-,] and [RShift-/] keys.
Step 3
Orient the IRST elevation scan zone in the direction of the target.
To do so, move the scan zone up or down depending on the possible target elevation with the
[RShift-;] and [RShift-.] keys. Elevation indicators are shown along the left side of the HDD. The
optimal way to search for targets is to scan along the vertical axis in small increments.
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