How F-15s and Stealth F-35s Could Wage War Together A fourth-generation warning radar, such as the F-15s Eagle Passive Active Warning Survivability System could help enable an F-35 jet to get close to an enemy without having to use its own radar or electronic warfare system. The Air Force is working to find new ways for the F-35 stealth fighter jet to operate in tandem with heavily armed fourth-generation fighters by taking advantage of its stealth characteristics and electronic warfare attack weapons. This is part of an effort to combine the ability to get “close” to an enemy yet still benefit from weapons available to less-stealthy aircraft armed with heavy weapons on external pylons.