During a recent press briefing on his visit to the White House in Washington, senior Israeli official — widely believed to be Prime Minister Benjamin Netanyahu — outlined an ambitious new national defense plan: to develop an indigenously built stealth fighter jet paired with a purpose-built unmanned combat aerial vehicle (UCAV). The core driver behind this initiative, Netanyahu has repeatedly emphasized in recent public remarks, is to eliminate Israel’s reliance on foreign military suppliers, whose political goodwill can no longer be taken for granted.
This long-simmering anxiety over supply chain vulnerability has been sharply amplified by a string of recent disruptions. The United Kingdom has suspended key military exports to Israel, while France has deliberately interfered with defense hardware shipments and blocked Israeli participation in major European defense exhibitions including Eurosatory and the Paris Air Show. These incidents add to a decades-long pattern of intermittent supply delays from the United States across multiple presidential administrations, including cutoffs of critical equipment such as Hellfire missiles, precision bombs, JDAM guidance kits, and tank ammunition under both the Obama and Biden administrations. Most recently, hostile remarks from senior figures in the current Trump administration, including Vice President J.D. Vance, have further stoked Israeli concerns about the reliability of outside suppliers.
According to Netanyahu’s outline, the full development program is expected to take 10 years to complete. But the initiative faces steep structural and financial challenges, rooted in Israel’s own history of domestic aerospace development.
Israel has a decades-long track record of building its own fighter aircraft, with mixed results. Its first domestic program, the Nesher, was developed as a derivative of the French Mirage 5, pairing a French Snecma jet engine with additional Israeli and American components. The platform served effectively in the Israeli Air Force until it was replaced by its successor, the Kfir, and updated Nesher jets were later exported to Argentina, where they saw combat action against British vessels during the 1982 Falklands War. The Kfir, the next iteration of Israel’s domestic fighter program, incorporated upgraded American avionics and a General Electric J-79 engine — the same powerplant used in the U.S. F-4 Phantom. The Kfir has been exported to multiple countries, including Colombia, Ecuador, and Sri Lanka; while Ecuador retired its fleet in 2012 after 30 years of service, seven upgraded Kfirs remain in active service with Sri Lanka as of 2026.
But Israel’s most ambitious prior domestic fighter effort, the Lavi program, ended in dramatic cancellation. Launched as an all-weather, 4.5-generation fighter platform, the Lavi quickly suffered massive cost overruns that consumed more than half of U.S. foreign military assistance allocated to Israel in the 1980s. The Israeli military openly opposed the project, arguing that its ballooning budget was crowding out other critical defense priorities, including the Merkava main battle tank and national air defense systems. At the same time, U.S. aerospace firms viewed the Lavi as a low-cost competitor to their own F-16 and F/A-18 platforms, and lobbied the Reagan administration to withdraw funding support. In 1987, the Israeli cabinet voted 12-11 (with one abstention) to cancel the program, a decision that remains controversial in Israeli defense circles to this day, with many viewing it as a devastating missed opportunity for the country’s domestic aerospace sector.
Today, the new stealth fighter and UCAV program faces many of the same obstacles that doomed the Lavi, alongside new challenges. Any full indigenous stealth development would almost certainly still require access to American or European propulsion technology, with the U.S. being the only viable major supplier. The finished aircraft would also directly compete with offerings from major American defense primes including Lockheed Martin, Boeing, and General Dynamics, meaning U.S. opposition would likely mirror the lobbying that derailed the Lavi. To move forward, Israel would likely need to negotiate a joint venture with U.S. industry or agree to export restrictions to ease competitive concerns.
Financially, the massive price tag of a full stealth development program would put significant strain on Israel’s national budget, threatening funding for other urgent defense priorities such as Iron Dome and other advanced air defense systems and precision smart weapons production. Additionally, Israel’s leading defense firms — including Israel Aerospace Industries (IAI), Elbit Systems, and Rafael Advanced Defense Systems — are already operating at full capacity to meet existing order demands and ongoing acute security requirements.
Against this backdrop, development of a standalone UCAV has emerged as a potentially more feasible alternative. Israel already has extensive experience integrating advanced unmanned aerial systems with its fleet of F-35 Adir stealth fighters, and UCAVs offer inherent stealth and performance advantages over manned platforms: removing the cockpit and pilot life support systems reduces radar cross-section, and unmanned platforms can withstand extreme G-forces that would incapacitate human pilots.
Even a UCAV program, however, would still face major hurdles. Like a manned stealth fighter, it would require an American-built powerplant, and the U.S. is already far along in development of its own Loyal Wingman collaborative combat aircraft (designated the F-47), which is scheduled to reach initial operating capability by 2030. The U.S. platform is designed specifically to augment the combat capability of F-35s, absorbing risk during strikes on heavily defended high-value targets such as enemy air defenses and command nodes, and will eventually complement the U.S. Air Force’s upcoming sixth-generation NGAD air dominance fighter that will replace the F-22 Raptor.
Ultimately, defense analysts conclude that Israel lacks the industrial depth, manufacturing capacity, and financial resources to develop both a manned stealth fighter and a new UCAV from scratch. A more pragmatic path could involve converting existing manned aircraft platforms into unmanned combat platforms, reducing development costs and timelines. As Israeli leaders weigh this critical strategic decision for the future of the country’s domestic defense aerospace sector, they will need to balance long-term strategic goals of supply independence against near-term budget realities and pressing security requirements. Most analysts expect that Israel will ultimately abandon plans for a fully indigenous manned stealth fighter, and will restructure its UCAV ambitions to align with its financial constraints and operational needs.
This analysis was contributed by Stephen Bryen, former U.S. Deputy Under Secretary of Defense, and appears originally in his newsletter *Weapons and Strategy*.