What does it say about a member of NATO rejecting the world’s finest combat-ready stealth fighter in exchange for a plane that won’t fly for another 15 years? Spain’s decision to reject the U.S.-made F‑35 Lightning II in favor of the Eurofighter Typhoon and the Franco‑German‑Spanish Future Combat Air System (FCAS) is greater than a purchasing decision it is a bet on European defense sovereignty, one that involves interweaving advanced aerospace technology with sovereignty politics.
The move, affirmed by Spain’s ministry of defence on August 6, is in line with Madrid’s €10.5 billion expansion plan for its military, 85 percent of which is reserved for European‑produced platforms. In the short term, Spain will increase its Eurofighter force to 115 aircraft, with 25 new fighters delivered over 2026 to 2030. The Typhoon, a 4.5‑generation swing‑role combat aircraft, is still a potent platform: its twin EJ200 turbofans provide each with 90 kN of thrust, propelling the aircraft above Mach 2 and enabling supercruise above Mach 1 without afterburners. Its canard‑delta design provides superior sustained turn rates, and its E‑Scan radar provides a 50 percent broader field of regard than fixed‑plate arrays.
But the actual strategic shift is to FCAS, a sixth‑generation “system of systems” scheduled for operational deployment in 2040. Under the European Technology Acquisition Program, FCAS will be based on a Next‑Generation Fighter (NGF) with very‑low‑observability shaping, multispectral sensor fusion, and an AI‑based combat cloud that will integrate manned and unmanned assets. Remote‑carrier drones will provide sensor reach, conduct electronic warfare, or dispense weapons, all real‑time coordinated. Safran and MTU advanced propulsion plans to merge supercruise with long range, while modularity is said to enable future developments like directed‑energy weapons or hypersonic missiles.
The engineering ambition of the program is matched by its political vulnerability. Dassault Aviation CEO Eric Trappier took a public slap at Belgium over ordering 11 additional F‑35As while pursuing full FCAS partnership, cautioning, “If [Belgium] gives up the idea of buying F‑35s, they’d be welcome, if they are not, then that’s really making a monkey out of us.” Belgian Defense Minister Theo Francken dismissed him as an “arrogant industrialist” and suggested Brussels could reconsider its €300 million FCAS investment. These conflicts reflect underlying Franco‑German tensions on workshare, with Paris allegedly making an 80 percent demand for NGF development a figure which German politicians say would be “the last nail in the coffin” for the project.
Spain’s action also takes place against a background of NATO’s new 5 percent of GDP defense spending goal, advocated by President Donald Trump. Madrid has been resisting the hike, concerned about excessive dependence on U.S. systems and the political influence inherent in the F‑35’s closely controlled software, mission data, and logistics chain. The F‑35’s ALIS/ODIN maintenance system and U.S.-managed mission data loads require that operators must not have full operational autonomy unless granted by Washington.
Technically speaking, the F‑35A has capabilities the Typhoon does not: a millimeter-measured radar cross-section, the AN/APG‑81 AESA radar with active and passive long-range modes, and sensor fusion that provides pilots with an integrated, intuitive picture of the battlespace. Its single F135 engine produces 191 kN of thrust, allowing for stealthy ingress and beyond‑visual‑range “first shot, first kill” fights. But the Typhoon’s agility, Mach 2 dash speed, and weapons versatility such as the Meteor BVRAAM and IRIS‑T render it better suited to within-visual-range combat, since even U.S. pilots have admitted in training.
The FCAS wager is that sixth-generation design will combine these advantages: sensor and stealth dominance of the F‑35 lineage, with the kinematic performance and flexibility of the Typhoon, and networked autonomy. If it arrives as projected, the NGF would be able to control swarms of attritable unmanned aerial vehicles, conduct multi-domain operations, and reconfigure software-defined systems to resurgent threats without multi-year upgrade cycles.
Nevertheless, the dangers are pressing. The €100 billion-plus program will have to avoid industrial competition, coordinate needs among three governments, and match developments by U.S. NGAD and the UK‑Italy‑Japan GCAP, both aiming at earlier entry into service. Delays would subject Spain to a capability gap during the 2030s, particularly if Eurofighter upgrades trail behind developing threats.
By rejecting the F‑35, Spain has opted for industrial involvement, operational autonomy, and long‑term technological aspirations rather than instant access to established fifth‑generation capability. Whether that wager pays off in the form of a world‑class sixth‑generation system or another cautionary tale about European defense collaboration will depend as much on political engineering as on aerodynamics and stealth paint.
