Since the invasion in 2022 I have kept a 'sand box' separate SF2 install covering Russia and the Ukraine. I keep it updated as more information becomes available and new weapons are introduced to the conflict. I re-researched and updated the information for radar and weapon performance etc. Where a key aircraft or weapon system wasn't avalible here at CA I created an accurate stand it. I made sure jamming was functional and scaled correctly with radar strength across the diffrent aircraft, missiles and SAMs.
It's not perfect but it's an accurate representation within the limits of the SF2 game engine (our modders abilities to improve it), and available accurate information on the weapon systems.
It has a few custom campaigns that follow the current order of battle information at that time.
How does the Ukrainian SU-27 fair in this 'sand box'? Not very well at all. The age of it radar, limited range of its AA-10 and lack of jamming ECM leave it particularly vulnerable. Especially once the AA-12 is in wide spread Russian service. That said using low level treetop height tactics to get close can help but any fight at medium altitude is dominated by the later generation Russian fighter, missiles and SAMs