Key Points and Summary – Israel’s F-35I Adir exists because the U.S. barred F-22 exports, forcing Jerusalem to seek a stealth jet it could tailor for Iran.
-The Adir pairs fifth-gen stealth and sensors with Israeli C4, electronic warfare, and the option to integrate local weapons.
-Declared operational in 2017, it made the F-35’s first combat debut and later intercepted Iranian drones, then featured prominently in June 2025’s 12-Day War against Iran—opening lanes through air defenses and enabling massed follow-on strikes.
-With TR-3/Block 4 upgrades and range enhancements coming, the Adir remains Israel’s spear tip for long-range, contested-airspace missions—even as adversary defenses evolve.
F-35I Adir: Israel’s Customized Stealth Jet—and How It Fought Iran
For two decades, Israel eyed the F-22 as the ideal “first-night” penetrator against high-end air defenses.
That door never opened: U.S. export restrictions kept the Raptor at home.
With the F-22 off the table, Jerusalem pivoted to the F-35—but only if it could hard-wire Israeli brains into the jet.
Washington ultimately granted unusual latitude, letting Israel integrate a domestic command-and-control layer, adapt electronic warfare, and preserve the option to add Israeli weapons—flexibility no other F-35 customer received.
The goal was simple: a stealth jet Israel could truly own in software, data, and tactics for the Iran problem set.
From Delivery to Dominance: the F-35I Adir Timeline
Israel received its first F-35s in late 2016 and declared initial combat readiness the following year. Within months the Air Force publicly acknowledged combat use—marking the F-35’s first operational strike anywhere.
Those early sorties set the template: stealthy ISR-strike packages slipping through dense air defenses to hit sensitive targets, feeding real-time intelligence across the force, and quietly shaping larger campaigns.
As squadrons matured, the jet became Israel’s preferred spear tip for contested-airspace jobs that demanded reach, discretion, and quick kill-chain closure.
F-35I Adir Fighter. Image Credit: Israeli Air Force.
What Makes the F-35I Different
At the heart of the Adir is a bespoke Israeli command-and-control layer—built on open architecture—to fuse on-board and off-board sensors, tailor threat libraries, and push targeting data to other shooters in real time.
Think of it as an Israeli “app stack” running alongside the jet’s native mission systems. It gives the IAF autonomy to iterate software rapidly, integrate new kill chains, and respond to adversary adaptations without waiting on a long U.S. baseline update cycle.
Electronic Warfare with an Israeli Accent
The standard F-35 carries a powerful EW suite; Israel negotiated the space to augment and adapt that envelope with domestic tech.
The result is an F-35I Adir tuned to the emitters it cares about most—regional SAMs and radars derived from Russian families—allowing crews to jam, deceive, and survive with profiles tailored to local threat behavior.
Survivability is not cloaking; it’s constant electronic problem-solving, and that’s where the Israeli layer earns its keep.
Weapons and Growth Path
From the outset, Israel sought the option to integrate local munitions internally to preserve stealth, along with a dedicated test aircraft to accelerate that work. Beyond specific stores, the strategic point is freedom of action: the Adir lets Israel mate its preferred effects—stand-off, precision, or specialized seekers—to fifth-gen access.
F-35I Adir. Image Credit: Creative Commons.
As TR-3 hardware and Block 4 software roll in, the jet gains more processing, new sensors and weapons options, and better threat-library handling—the kind of growth headroom Israel wanted for a long campaign against a learning adversary.
Range: The Eternal Constraint
Iran is far and tankers are vulnerable. Israel has explored multiple ways to stretch the Adir’s legs—from careful refueling concepts and routing to work on external tanks for specific mission sets. Range is improving through both tactics and hardware evolution, but planning still assumes contested tanking and smart ingress/egress through defended airspace.
Combat Record Before 2025: Paving the Way
Israel didn’t wait for a major Iran fight to blood the jet. The Adir’s first publicized combat was in 2018; subsequent years saw intercepts of Iranian drones and, notably, the shoot-down of a cruise missile launched from Yemen. Each engagement refined electronic orders of battle, sensor-fusion playbooks, and joint processes with fourth-generation “bomb trucks.” By the time the bigger fight arrived, the Adir community had already rehearsed the rhythms of stealthy access paired with massed follow-on fires.
The 12-Day War with Iran: How the Adir Fought
Israel opened with synchronized strikes across Iran aimed at nuclear infrastructure, missile forces, and air defenses. Multiple waves of aircraft, coordinated electronic attack, and long-range precision fires sought to blind key radars and fracture command-and-control.
The Adir’s role: stealth ingress for ISR and suppression tasks, prying open corridors through radar networks, and cueing follow-on F-15I and F-16 formations.
From night one, the jet functioned as both scalpel and scout—finding, fixing, and finishing, and then handing off targets for massed effects.
F-15I Fighter from Israel. Image Credit: Creative Commons.
Iran tried to say it shot down the F-35I, but that was clearly a lie. And, in fact, the F-35I dominated the skies, with many members of the Israeli military telling me over the last few months the Adir could fly anywhere it wanted in Iran, and likely Tehran would never know where it was until it was too late.
Trading Blows
Iran responded with massed drones and ballistic missiles. Israel and regional partners intercepted the bulk of inbound salvos, while Adir packages pressed their own counter-air and suppression missions. Claims that Iran downed F-35s never materialized in credible reporting; the fleet kept flying. The broader lesson was the importance of endurance at high operational tempo: launching, recovering, turning jets quickly, and maintaining a steady pressure on enemy sensors even as the threat tried to saturate defenses.
Deep Targets, Sensitive Sites
Within days, imagery and battle-damage reporting showed significant hits on missile bases and critical nodes supporting nuclear and ballistic programs.
Not every target can be ascribed to a specific platform, but the pattern was clear: fifth-gen packages were central to disabling radars, SAM batteries, and C2 hubs that shielded deeper infrastructure. That is precisely the mission set the Adir was purchased to execute—open doors, keep them open, and enable repeated strikes under a protective blanket of stealth and EW.
U.S. Entry and the Final Turns
As U.S. forces joined with their own strikes against Iranian nuclear sites, Israel’s Adirs helped maintain corridors and suppress adversary sensors. Israeli aviation also targeted airfields and aircraft on the ground to limit Iran’s ability to contest strike windows. A ceasefire followed, with Israeli leadership signaling that the operation had degraded key elements of Iran’s missile and nuclear support networks.
F-35I Adir Fighter from Israel. Image Credit: Creative Commons.
Throughout, Adirs consistently appeared in the most demanding target sets—the ones that required both access and exquisite targeting.
What the F-35I Adir Proved
Access at scale: It penetrated layered air defenses repeatedly, on a tight battle rhythm.
Team play: It fused intelligence for fourth-gen formations, multiplying overall effects.
Resilience: Despite massed enemy fires—including attempts to damage bases—the fleet sustained operations and held the initiative.
Technical Takeaways from Wartime Employment
Sensor fusion + C4: The Israeli overlay let crews tailor threat-library updates and push targeting faster to other shooters—vital in a fluid, multi-axis campaign where windows opened and closed in minutes.
EW Agility: Adapting EW profiles against Iranian emitters (and their derivatives) mattered as much as radar signature. Survivability was a function of both stealth and rapid electronic adaptation.
Range and tankers: Assertions that Adirs struck “without tankers” are speculative at best. Operational reality likely involved a blend of smart routing and aerial refueling. Range remains a design and tactics focus going forward.
What Comes Next: Upgrades, Scale, and Deterrence
Israel is expanding the fleet while rolling in TR-3/Block 4 upgrades—more computing power, enhanced sensors, and additional weapons. Pair that with continued iteration of Israeli C4/EW and likely range enhancements, and the Adir stays relevant against denser defenses and new radar sets.
The concept that drove the entire procurement—Israeli control of mission systems, data, and the growth path—keeps the jet on a steep capability curve. Adversaries will adapt; the point is Israel can adapt faster.
Bottom Line
Israel didn’t get the F-22, so it built something different: a stealth jet it could truly own.
The F-35I Adir is less a copy of America’s F-35A and more a platform Israel keeps teaching new tricks. In the 12-Day War, it did exactly what it was designed to do—open doors, blind defenses, and set conditions for decisive effects at range.
The next iteration will only make it more dangerous.
About the Author: Harry J. Kazianis
Harry J. Kazianis (@Grecianformula) is Editor-In-Chief and President of National Security Journal. He was the former Senior Director of National Security Affairs at the Center for the National Interest (CFTNI), a foreign policy think tank founded by Richard Nixon based in Washington, DC. Harry has over a decade of experience in think tanks and national security publishing. His ideas have been published in the NY Times, The Washington Post, The Wall Street Journal, CNN, and many other outlets worldwide. He has held positions at CSIS, the Heritage Foundation, the University of Nottingham, and several other institutions related to national security research and studies. He is the former Executive Editor of the National Interest and the Diplomat. He holds a Master’s degree focusing on international affairs from Harvard University.
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