by Moran Vidislavski
October 2024: Israeli F-35I jets flew 2,000 km deep into Iran, destroyed Russian-made S-300 air-defense systems, and returned home without a scratch.
Pentagon officials watched it happen in real time.
June 2025: Suddenly, the U.S. defense budget includes funding to copy the Israeli modifications.
The FY2026 budget now allocates money to study the installation of external fuel tanks on American F-35s – the exact same technology Israel has been using for years.
America abandoned that idea decades ago. After watching Israeli jets dominate, the Pentagon changed course and started copying. The timeline tells the story.
Between 2004 and 2007, Lockheed Martin conducted studies on adding external fuel tanks to the F-35. They designed a 480-gallon system, later refined to 460 gallons. Engineers solved aerodynamic issues. They tested separation mechanisms. Then, in 2007, the program was canceled.
Pentagon officials decided the F-35’s range was “good enough” compared to 4th-generation fighters and gave up.
Israel disagreed. Starting in 2016, Israeli Air Force engineers began developing their own external and conformal fuel tank systems for the F-35I Adir. They didn’t ask permission – they solved a problem the American designers insisted didn’t exist.
Israel needed the ability to strike Iran without air-to-air refueling. That means round-trip missions of 2,000 km through hostile airspace.
The standard U.S. F-35 had a combat radius of only ~670 nautical miles – not enough.
Driving distance from Helsinki Finland to Moscow is 675 miles for you IFR guys.
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1. Elbit Systems developed a 425-gallon droppable under-wing tank. It hurts stealth, but provides extended range during portions of the mission where detection isn’t critical. The tanks jettison cleanly, and the pylons are designed to minimize radar signature after release.
2. Israel Aerospace Industries (IAI), in cooperation with Lockheed Martin, developed conformal fuel tanks. These hug the fuselage, are coated with RAM (radar-absorbent material), and preserve stealth. The 800-gallon conformal system enables the long-range missions Israel required.
The engineering challenge was massive. Any change to the airframe’s shape risked ruining stealth. Israel solved problems American engineers had abandoned years earlier.
The modification process required surgical precision. Every attachment point needed radar-absorbent coating. Fuel lines had to integrate without creating radar returns. The aerodynamic profile could not change significantly.
Israel spent years solving challenges the Americans claimed were too difficult or too expensive.
October 26, 2024 proved everything.
The attack on Iran involved over 100 Israeli aircraft striking 20 military targets inside Iran. The mission required F-35I jets to fly more than 1,100 miles each way – through Syria and Iraq. Not a single aircraft used aerial refueling. None landed at a foreign base. Every jet flew to Iran, hit its targets, and returned home on internal + external fuel alone.
Pentagon officials watched. They knew U.S. F-35s could not execute that mission profile. American jets remain dependent on vulnerable tanker aircraft.
In contested environments against peers like China, tankers are prime targets. The vast distances of Asia make the Middle East look small. China’s counter-strategy specifically targets U.S. refueling tankers.
The Israeli strikes didn’t just demonstrate greater range – they proved the modifications do not degrade combat capability. F-35Is used their electronic-warfare suites to blind Iranian radars while still carrying external tanks. They penetrated airspace protected by Russian S-300s, struck their targets, and exited without losses. The technology worked exactly as Israel promised.
June 2025 brought an even larger operation. Over 200 Israeli aircraft struck Iranian nuclear facilities in “Operation Rising Lion.” Once again, F-35Is flew over 2,000 km without refueling. They destroyed several S-300 batteries and neutralized air defenses that were supposed to protect Iran’s most sensitive sites. The Pentagon could no longer look away.
The 2026 budget request revealed America’s response: the U.S. Air Force included funding to study adding external fuel tanks to its own F-35s. Documents explicitly mention exploring conformal tanks as part of the Block 4 upgrade.
This is a complete reversal of the 2007 decision to abandon external tanks. The document states clearly: “Assess feasibility and decompose requirements for integration of external fuel tanks to support extended-range missions.”
American engineers will now study how Israel solved the stealth and aerodynamic challenges that defeated Lockheed Martin a decade earlier.
The strategic driver: China. The Pentagon understands a potential Pacific war requires enormous range.
The copying goes beyond just fuel tanks. Pentagon officials have openly said they are learning from Israel’s overall approach to the F-35I.
In 2023, Under Secretary of Defense William LaPlante testified to Congress that Israel’s experience provides “critical insights” for sustaining F-35 operational readiness in high-intensity combat. He specifically highlighted that Israel kept 35 of its 39 jets mission-capable during wartime – a decisive metric for the Pacific theater.
F-35 program manager Michael Schmidt has said the Pentagon is learning “a great deal” from Israel’s F-35I operations. He called Israeli readiness rates “excellent” – far higher than U.S. rates. Schmidt emphasized that Israel’s modifications and maintenance approaches serve as an important model.
Even in electronic warfare, America is copying Israeli innovation.
Israel replaced the standard AN/ASQ-239 EW suite with home-grown Elbit systems. The Israeli modification proved highly effective against Russian systems in Iran. The Pentagon now admits the Israeli EW suite directly contributed to the destruction of S-300 batteries.
British Chief of the Defence Staff, Admiral Tony Radakin, publicly stated that Israeli F-35s “effectively took down almost the entire Iranian air-defense network.”
| What a pity Prime Minister Sir Keir Starmer angered Israel so badly with that Palestine thing that Britain’s been cut off from the source. |
In weapons carriage: Israel routinely operates the F-35I in “Beast Mode” with heavy external loads – something the U.S. long avoided. Combat experience proved the advantages sometimes outweigh the stealth penalty.
Israel also led the world’s first operational use of the F-35 in combat (Syria 2018), the first air-to-air kills of Iranian drones (2021), and the first integration with systems like Iron Dome and David’s Sling. All because of operational requirements the Americans never faced.
The F-35I + F-15I teaming concept is another model the U.S. is copying – using the F-35I as an airborne sensor network to empower legacy fighters. The Pentagon has called this a core principle for the Pacific theater.
The budgetary impact is enormous: Israeli modifications created capabilities the U.S. thought would require a 6th-generation fighter. Israel spent millions – America saved billions.
Pentagon officials have admitted: “Israel’s combat experience is saving the United States billions of dollars.”
Israel has become a real-world combat laboratory providing actual data for American development.
The relationship has flipped: once the U.S. taught Israel about the F-35. Today the U.S. learns from Israel.
Restrictions on modifications have been gradually lifted, and American engineers now study Israeli solutions.
June 2025 was the final proof. F-35Is struck the enrichment facilities at Natanz and Fordow – among the best-defended sites on earth. They penetrated, hit their targets, and exited unscathed. The S-300s failed.
Israeli EW paralyzed Russian radars. Conformal tanks provided the range. Israeli maintenance ensured 100% availability.
The Pentagon understood immediately: if Israel can penetrate Russian systems in Iran, the U.S. can penetrate Chinese systems.
The Israeli solution is exactly what America needs.
The 2026 budget funding fuel-tank research is the official admission: America is copying Israel’s F-35 modifications – because they simply work better than the original American spec.
Approximately $432 million has been allocated for ongoing F-35 upgrades – including capabilities Israel has operated for years.
Reality: America is now relying on innovations developed by Israel in actual combat.
Israel built what the Americans said was “too hard.” October 2024 and June 2025 proved Israel was right.
F-35I jets destroyed Russian defenses, struck targets 2,000 km from home, and demonstrated capabilities America didn’t have.
The world’s most powerful military is copying innovations from a country the size of New Jersey – because the Israeli innovations simply work.
The next war will be decided by those who learned the right lessons from real combat. Israel taught those lessons.
America is finally writing them down.