Hello,
concerning the incident over Syrte in the year1981 it is not clear if the Su-22 or Su-22M were armed with either the R-3S or the more advanced R-13M. It can be that an R-3s was fired by mistake or that an R-13M was fired with an “limited” head-on look. If the seek of an R-13M were close to the heat source it could be possible to look on head-on. But the distance was normally too close as that the missile could guide properly. Therefore, the term “Limited” Head-On capability.
To solve the problem in game I propose:
a Give the missile an all-aspect capability,
reduce the "max. Launch Range" and/or the "max Seeker Range", reduce the "Seeker Gimble Limit", reduce the "Max Turn Rate" & reduce the "Seek Track Rate".
The exact values must be determined by “try and error”.
Since the Su-22 and the Su-22M don’t have a proper aiming system for air-to-air combat with missiles, you have to archive an look-on via PKI (boresight).
Attached may some additional information about the FON over Syrte.