Why don't any US Air Force or US Navy fighter jets put radar and ECM equipment in long protrusions between the exhaust nozzles like the Russian Su-57 and Su-27? - Quora
Flanker Radars in Beyond Visual Range Air Combat
Origins- Evolution of the Su-27 into an F-15 killer (Part-2) – Defencyclopedia
FC3 - UOAF Codex
Steam Community :: Guide :: Su-27 Flanker Beginners Guide